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Horizontal Wells 2019 Challenges and Opportunities
- Conference date: May 27-31, 2019
- Location: Kaliningrad, Russia
- Published: 27 May 2019
74 results
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Evolution of Well Placement Methods Introduced on the Field of Volga-Ural Oil and Gas Province
Authors D. Nazipov, S. Lebedev, V. Sayfitdinova, V. Dunaev and V. PermyakovSummaryVast experience has been gathered in drilling horizontal wells in the Volga-Ural oil and gas province in both carbonate and clastic rocks. In order to overcome the risks, related to geological uncertainties, and achieve the wells’ objectives, almost all available logging-while-drilling technologies, related to geosteering, have been utilized. Three representative wells have been reviewed to demonstrate the advantages and drawbacks of the three geosteering methods.
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Well Placement Improves Understanding of Complex Geological Conditions in North Truva Field, Kazakhstan
Authors D. Nazipov, P. Bybin, T. Popov, M. Medvedev, A. Makhambetov, M. Sharov, M. Kozhakhmetov, Wang Song Po, Chen Bo, Fan Ping, Zhang Xian Cun, Miao Qian You and Yu WeiSummaryA horizontal well was planned to be placed in two target intervals within limestone formation. The pre-job study was performed to identify the best fit LWD technology for the two target intervals. Due to the difference in properties, different measurements and technologies were chosen. The application of the carefully chosen technologies proved their effectiveness and relevance and enabled successful geosteering, improved structural behavior understanding and made it possible to evaluate petrophysical properties of the reservoir rock in real time.
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Microseismic Investigations Capabilities for Design of Horizontal Wellbore and Multistage Hydraulic Fracturing for Tatneft Pjsc
Authors I.R. Sharapov, R.S. Khisamov, N.A. Nazimov, R.F. Husainov, S.A. Feofilov and V.A. RyzhovSummaryResults of microseismic surveys from the surface are presented by the example of a 700 m long horizontal wellbore drilled in a top part of structure in carbonate deposits of Zavolzhskiy horizon. These results include microseismic monitoring of the active fractures network and multistage hydraulic fracturing monitoring. Results of microseismic monitoring of multistage hydraulic fracturing are supported by data of spectral noise logging and high-sensitivity thermometry of horizontal wellbore, conducted during well completion after multistage hydraulic fracturing.
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Optimization of Horizontal Well Drilling and Hydraulic Fracturing Based on the Predictyion of Tectonogenic Fracturing
By M. ZubkovSummaryAn original technique based on the use of the deformation and acoustic properties of a full-sized core in combination with paleomagnetic studies, which allows to determine the direction of the “main stress” in the sedimentary layer, is considered. Examples of the application of the optical-polarization and tectonosedimentation methods for predicting areas of tectonogenic fracturing and decompaction are given. The results obtained using these methods can be used in planning horizontal drilling and hydraulic fracturing of productive strata.
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Horizontal Wells the Key Technology for Oil Extraction from Undersaturated Deposits of Vikulovskaya Suite on Krasnoleninskoe Field
Authors A. Glebov, I. Likhoded, D. Emelyanov and A. ZharkovSummaryCurrent work presents the results in evolution of drilling vikulovskaya suite since 2013 and up to 2019 on Krasnoleninskoe field. It has been possible to improve the project by optimization and structuring the approaches, which were implemented to enhance drilling efficiency of such a complex reserves: 1) detailed planning strategy of drilling each well from a pad; 2) additional exploration during production drilling, retesting with fracturing of old wells; 3) a multivariable planning strategy for trajectory of horizontal wells; 4) enhanced operational support while drilling; 5) completion optimization for horizontal wells with multistage hydraulic fracturing; 6) planning the optimal number of stages for fracturing on horizontal wells; 7) increasing of horizontal well length and number of fracturing stages.
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Using of Heat Sourses in Horizontal Well for Pay Zones Allocation
Authors R. Sharafutdinov, R. Valiullin, T. Khabirov, A. Ramazanov, V. Fedotov and I. NizaevaSummaryThermohydrodynamic methods are widely used for diagnostics of horizontal wells. Generally, horizontal wells have low local flow velocity and small pressure drop. Thus, flow spinners may not work and temperature logs can be uninformative for pay zones allocation. In this regard, a promising approach is the use of heat marks for pay zones allocation and inflow profiling. Features of temperature distribution in the wellbore in the presence of heat sources are considered in this paper. In addition, there is an analysis of field data with temperature marks formed by well tractor, which is used for tool and induction heater conveyance.
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The Method of Quantitative Evaluation of the Confirmation of the Forecast for the Structural 3D Model for the Horizontal Section of Wells
More LessSummaryGeological support of drilling the horizontal section of wells, the three-dimensional geological model performs a large number of functions. One of the main ones is a reliable prediction of the reservoir structure along the projected wellbore. With an increase in the number of horizontal wells, the issue of quantitative evaluation becomes more relevant and it becomes possible to test the method of assessment for adequacy, compliance with the qualitative assessment and analysis of the results obtained. The main objective of the study is to determine quantitative evaluation criteria, which allow to reliably characterize the confirmation of the model and differentiate the drilling results in detail. Analysis of the research results was carried out in two main directions. To achieve the main goal, the construction of the total histograms of the calculated values was performed. An assessment was made to determine the well rating according to the degree of confirmation of the model. The second direction was to test the hypothesis about the presence of a correlation relationship between the characteristics of the project well: the length of the horizontal section, the power of the target interval, the average distance of the environmental wells, with the model correction value.
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Gazprom Neft Approach to Horizontal Well Production Logging Improvement. Case Studies
Authors M. Kremenetskiy, A. Ipatov, M. Kolesnikov, A. Sharipov and E. PahomovSummaryThe article presents the experience of Gazpromneft Company’s specialists in the field of production logging informative value improvement for horizontal wells and wells with complex completion. The potential for increasing the capabilities of the production logging increased mostly by the use of more informative measurement technologies. Production logging technology enhancement presented for different logging environment.
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Assisted Geosteering while Drilling Through Machine Learning Techniques
Authors I. Denisenko, I. Kuvaev, O. Kushmantsev and I. UvarovSummaryAssisted geosteering technique allows to substantially improve the quality of the well placement for modern wells drilled in complex geological settings with high ROP. The paper shows some cases built based on the real data illustrating how this new approach can influence drilling decisions in real time.
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Results Gained from Application of Dielectric and High-Resolution Nuclear-Magnetic Resonance Complex for Assessment of Fluid Type in A Borehole and in Core
Authors V. Murzakaev, N. Belousova, A. Bragin, V. Skirda, A. Alexandrov, T. Abdullin and M. AmerkhanovSummaryThe Work contains results of high resolution equipment application based on Nuclear Magnetic Resonance and its integration with Waveform Dielectric Logging when evaluating the type of fluid which saturates the pore space.
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Borehole Acoustic Reflection Survey in Horizontal Wells for Evaluation of Fractured Reservoirs
Authors Y. Karpekin and A. PushkarskySummaryYurubcheno-Tokhomskoe oilfield in east Siberia comprised of very low porosity fractured dolostone reservoir, which is being developed by horizontal wells. Formation evaluation program includes ultrasonic-image and acoustic logs to characterize fracture network and identify permeable fractures. Up to several thousand individual fractures might be identified over horizontal well section, however production logs demonstrate that producing intervals are discrete, short and not evenly spaced. Stoneley wave permeability indicators are not consistently successful in identifying producing intervals due to plugging off permeable fractures by LCM material. To overcome this limitation, we modified acquisition program to include borehole acoustic reflection survey (BARS) that allows to identify big fractures extending far from a wellbore. A novel processing technique has been devised to image fractures oblique and perpendicular to the borehole axis. Production logs confirmed flowing fractures identified on BARS and demonstrated a complex pattern of oil, water and gas influx from specific fracture types. BARS and PLT data allow localization of fractured interval requiring acid stimulation to clean off plugging material. Theory of the method and a case study of BARS data interpretation in horizontal well are discussed.
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Specifics of Maturing and Geonavigation in Hotizontal Sections More than 1 Km Length and Multi-Lateral Wells
Authors A. Antonov and D. ZhukovSummaryEarly stages of Piltun development were associated with multireservoir completion. These wells are producting from reservoirs with different properties. After several years different reservoirs had been depleted differently which increased complexity of surveillance. This circumstances pushed subsurface engineers of Sakhalin Energy Investment Company Ltd. to focus on maximizing production from dedicated areas within certain reservoirs. The best solution was found within horizontal wells. Here we’d like to share our experience of constructing and planning horizontal wells. How these wells would be navigated within the reservoir? What risks and gain are associated with them taking into account offshore factors of the field development?
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Application of Azimuthal Density Data in Geosteering Process of Horizontal Wells. Main Advantages, Limitations and Interpretaion Mistakes
By D. KlychevSummaryIn present moment using real-time data of wellbore images in horizontal wells is widely used. Wellbore images helps to determine DIP angle and DIP azimuth of layer. This data simplify well trajectory adjustment and decrease risks of wrong decisions. But they also has some geological and technological limitations which influenced on interpretation. Knowing this limitations will help to correctly understand images data and prevent wrong decisions
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Fault Interpretation in 3D Seismic Data and Their Verification with Horizontal Wells Data on the Example of the Caspian Sea Oil-Fields
Authors A.V. Gorban and I.N. KerusovSummaryLogging while drilling does not allow for predicting in advance the approach to fault. Estimation of the fault displacement using borehole data is ambiguous in homogeneous formations without significant contrast of physical properties, or in the presence of lateral facies changes. Therefore, very important tasks of interpretation of seismic data are: fault identification and clarification of fault displacement. Detailed interpretation of seismic data in combination with borehole data reliably allows to identify faults, including small-scale (vertical displacement 3-5 meters ), to reveal spatial distribution of faults, to clarify fault displacement and thus to reduce the risks and uncertainties while drilling horizontal wells, and update the geological model of the field at the development stage.
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3D Petrophysics (Hawe) for Geosteering and Geological Tasks
Authors A. Kolomytsev and V. KolesovSummaryBasic well logs interpretation is done based on radial model, which was initially developed and proved its reliability in vertical wells. Applying of this approach for high angle wells may cause false results. Because tool measurements are influenced by formations at the distance with different properties. All this above adds the complexity into petrophysical interpretation - true formation properties evaluation. The new approach for HAWE is 3D petrophysics. This approach include detailed petrophysical and geological modelling using multiscale information: borehole images, well logs, geosteering and seismic data. This work explains the methodology of loggig-while-drilling data interpretation in three-dimensional space. The results of several wells interpretation are compared with standard approach (coaxial - cylinder model) and with 3D. The difference in formation properties and NTG are shown for both methods with the recommendation of 3D approach.
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Ultra Deep Lwd Technology Application in Reservoir with High-Amplitude Faulting
SummaryIn this article described Ultra deep LWD technology application in reservoir with high-amplitude faulting of Filanovskogo field in Caspian region. Filanovskogo field developing by drilling multi-lateral wells. The main geological uncertainties are lateral changes, faults with high amplitude, decreasing of thicknesses and properties. Base on production program for drilling multi-lateral well was set few goals which was achieved by using Ultra deep LWD technology applied, presented in this article.
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Features of Gas Inflow Into the Slanted Gas Wells
Authors S.K. Sokhoshko and M.A. Rojas-MikheevaSummaryThe features of gas inflow to the slanted gas well are considered. The gas filtration rates in the bottom-hole zone of the slanted well are calculated taking into account the existing inflow profile and the dependence on the zenith angle of the wellbore and its length along the formation. It is noted that by increasing the zenith angle and the borehole length, the law of gas filtration in the bottom hole zone of the slanted well changes from nonlinear to linear with constant pressure draw-down.
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The Experience of Geosteering while Drilling Wells with Horizontal Completion in the Upper Jurassic Sediments of West Siberia
By V. NemovaSummaryWe consider the successful experience of geosteering while drilling of extended (1000-1500 m) horizontal wellbores to the Upper Jurassic deposits of Western Siberia under conditions of an extremely limited well data during drilling based on a detailed structural framework, planned drilling trajectory and data of GR and sludge available during drilling. This experience is an example of the successful import substitution of the expensive LWD service.
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Experience in the Study of Core from A Horizontal Well Borehole Drilled in the Sands of the Vendian East Siberia
Authors A.V. Plyusnin, I.A. Vakhrusheva, Y.I. Gilmanov and A.P. VilesovSummaryThe object of research in this work is the core of two horizontal wells, first drilled by an oil company on the territory of the Mirny ledge in the north-eastern part of the Nepa-Botuobinsky anteclise. The core characterizes terrigenous sediments of the Buk suite of the Tyr horizon of the upper Vendian. Such formations are characteristic of delta complexes, in which low-density prodeltovy clay deposits form diapirs in overlying sandy sediments. In the vertical wells of the license area, such formations have not been previously diagnosed, although they can be very important in geological and hydrodynamic modeling of the reservoir and its development. Thus, the forecast of exploratory and production drilling should be based on a reliable geological and geophysical model of the target object. To achieve this, it is necessary to have a spatial understanding of the structure of the tank and the change in its filtration-capacitive lateral. Studying the core from the horizontal wellbore and the subsequent correct use of the results of such studies will help to determine these objectives, which will allow the Company to reduce geological and economic risks.
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Experience of Using Flexible Tubing Technology When Working with Hard-To-Recover Oil Reserves in Western Siberia
Authors V. Karpov and N. ParshinSummaryWe consider the successful experience of using flexible tubing technology when conducting multi-stage hydraulic fracturing in wells with horizontal completion located in sediments with hard-to-recover oil reserves using the example of Bazhenov Formation and AC3 formation in Western Siberia. The successful experience of combined use of coiled tubing and reusable sleeves, simultaneous use of hydraulic fracturing fleets and coiled tubing fleets is shown.
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Individual Fracture Evaluation in Multiple Hydraulically Fractured Horizontal Wells by Well Testing and Production Logging
Authors E.I. Grishina and A.V. BuyanovSummaryThe Paper presented usage of Well Testing and Production logging in Horizontal wells in low permeability reservoirs. The obtained test results were reviewed in order to estimate parameters of each individual fracture and reservoir permeability using production contribution of each fracture by PLT and bottom-hole pressure and surface liquid rate of tested wells. Optimal testing technology and interpretation methodology is justified by numerical modeling.
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The Use of New Seismic Data Processing Methods to Predict Changes in Reservoir Properties During the Design of Horizontal Wells
Authors E. Anokhina and G. ErokhinSummaryThe new VPRTM seismic data processing method calculates various field attributes that allow you to take a fresh look at the usual section and more accurately estimate the parameters of the reservoir and also correct the trajectory of the horizontal wellbore. The relationship between data logging GK, NGK, PZ and caliper and the various parameters calculated by the method VPRTM, show high sensitivity to changes in petrophysical parameters in the reservoir.
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Horizontal Wells. Why Can’T Trust the Logging while Drilling Depth and Is It All Bad?
Authors A. Bokarev, I. Malikova, M. Lavrentyev and M. RizvanovSummaryThe theater begins with a hanger, and all measurements in a well begin with depth. Depth answers the simple question “Where?”. The location of pays, fluid contacts, and intervals of workover jobs - depth is responsible for all this. Traditionally, depth measurement tools are wireline cable or drill pipe. The error is different, as well as the mechanisms of its appearance. In vertical wells, measured by cable, as a rule, the problem of depth error is easily solved with a downlog. But in HAHZ wells the cable is used extremely rarely, logging while drilling is used. In this case, the error of depth measurement can reach up to 10-15 m of measured deoth and 3-5 m in vertical depth. Nomber of horizontal wells in Russia is growing every year, and today more than a third of wells drilled in Russia have a horizontal section. Adding to this figure - higly inclined wells, measured on pipes, we will get a significant reason to revise the problem of the depth measured on pipes and learn how to refine it. The purpose of the paper is to assess the factors that distort the depth while drilling and propose ways to refine it.
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Gas-Oil Contact Determination in Horizontal Wells while Interpreting Lwd Data in Pokur Formation
Authors I. Malikova, Y. Kosharnaya, A. Bokarev and M. LavrentievSummaryPetrophysical interpretation of Triple-Combo LWD in horizontal wells for Pokur formation of oil/gas-condensate fields of Western Siberia is associated with several uncertainties. The reason is the reservoirs of Pokur formation are characterized with high shale volume and therefore with low-contrast formation resistivity. In this case traditional approach to Petrophysical Reservoir Estimation of LWD data based on resistivity cutoff will not work accurately and consistently and more to the point, will not allow to detect fluid contacts in horizontal wells. Furthermore Triple-Combo log data in conditions of shaly reservoir will not demonstrate qualitative indicators of gas saturation such Neutron-Density crossover. However advanced Wireline logs in pilot well will allow to build a volumetric litho-fluidal model for the similarly-named formation and afterwards, applying this model to LWD data in horizontal wells, will allow to solve a fluid contacts detection challenge.
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Development of Complex Carbonate Reservoirs of High-Viscosity Fields with Systems of Adjustable Intervals of Horizontal Wells
Authors V.A. Sudakov, L.I. Minikhairov, D.K. Nurgaliyev, A.Sh. Miyassarov, R.R. Khuzin and D.A. SalikhovSummaryThis paper presents optimization of the well spacing, taking into account the injection of water at certain points in time, the potential breakthroughs of water from the WOC area and the geometry of the wells using reservoir simulation. It was shown an assessment of the technology effectiveness of separately-alternate work of the horizontal wells in complex carbonate reservoirs of the Bashkir stage based on reservoir simulation results. The efficiency of the proposed technology is shown in comparison with traditional methods of horizontal wells operation.
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First Advanced Mud Logging Measuruments in Russia
Authors A.A. Karev, A. Mingazov, M. Ivashin and A. TsiklakovSummaryAdvanced mud logging meusuruments was used on the field where fluid contacts between gas, oil and water hardly complicated on triple combo measuruments. This technology demonstrate rebost quantitative measuruments which was proved by sampling fluid tool.
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The Use of Digital Information Systems to Improve the Efficiency of Field Development Using Horizontal Wells
Authors R. Studinsky, R. Zulkarniev, R. Asmandiyarov and D. VorobyovSummaryTo calculate the efficiency of horizontal fracturing on horizontal wells, a module has been developed that allows to evaluate the effect of primary and repeated multiple fracturing.The module takes into account the increase in the number of stages of multiple fracturing, the half-length and width of the crack, allows you to assess the risks of breakthrough clay barriers and choose the best option of intensificationFor the selection of wells for sealing drilling, an algorithm was implemented to identify the undeveloped areas of the reservoir with the calculation of the effectiveness of geological and technical measures and the risk assessment in each zone.
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Features of the Wells at the Field. V. Filanovsky Under Conditions Complicated by Tectonic Disturbances and High Lateral Heterogeneity
Authors I. Khaliullov, M. Golenkin and A. AlekseevSummaryOil and gas condensate field im. V. Filanovsky is located in the Northern part of the Caspian sea, 150 km from Astrakhan. The field has been developed since 2016 by drilling horizontal wells from offshore platforms. Drilling of wells involves a number of risks, such as changes in the geological structure of the field, the presence of discontinuous tectonics, lateral heterogeneity, etc. For example, well # X demonstrated a high effectiveness of the implementation structure of works for well construction at OOO «LUKOIL-Nizhnevolzhskneft» using software Petroventkomplekt, allowing to solve a wide range of tasks as in the pre-simulation and in real-time.
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Development of Terrigenous Reservoirs Drilling and Completion Technology for Horizontal Wells
By I. NekrasovaSummaryThe complex of oil-based technological fluids is developed in ООО LUKOIL-Engineering in order to work with the productive formation presented water sensitive terrigenous rocks: invert-emulsion drilling fluid and waterless acid-micellar breaker are presented. The evaluation method of invert-emulsion filter cake destruction by breaking compositions is considered. Requirements to breaking compositions depending on the nature of the pollution zone are formulated. Methodological approaches to evaluating the impact of fluids on the reservoir properties are presented. This technological fluids complex has been used successfully in the fields of Perm region, the results of well hydrodynamic research methods have proved technical and economic efficiency for an integrated approach.
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Approaches to Justifying Combined Development Systems Based on Technology Maps (A Case Study of Np8 and J2-6 Reservoirs of Novoportovskoye Oil and Gas Condensate Field)
Authors R.R. Badgutdinov and I.V. PerevozkinSummaryAt the designing stage of Novoportovskoye field development, a decision was made to drill 1,000-1,500 m horizontal wells. In 2015-2016, the project team developed a technology plan that included an assessment of technological availability to drill complex design wells and selection of geological targets for testing and subsequent economic evaluation.
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Application of Gti Data on Terrigenous Strata of Western Siberia in Order to Increase the Efficiency of Well Placement and Optimal Placement of Hydraulic Fracturing Ports
Authors R. Minikeev, T. Rakhimov, N. Nebogin and R. ChyapukasSummaryIdeas about geological and technological research (hereinafter referred to as GTI) as the basis of a system for providing information for the construction of wells, solving a wide range of geological and technological problems at all stages of well construction. In this paper, we studied the methodology for analyzing GTI data, presented statistics of the correlation of the results obtained with GIS data and their interpretation, selected the optimal group of data analysis techniques at a qualitative and quantitative level. The main problem that has been touched in the work is the lack of information on the sections providing maximum inflows to the ports of the multi-stage hydraulic fracturing in horizontal wells. The statistical material on the flow profiles of 33 horizontal wells, geophysical data, as well as data of geological and technological studies of wells in the drilling process are considered.
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New Approach to Determine Saturation in Complicated Geological Conditions
Authors A. Zozuly, M. Miletsky, A. Mityagin, L. Urmatseva, V. Kuzakov and A. CheprasovSummaryThe comparison of two independent methods for determining the coefficient of oil and gas saturation is discussed. The most common method for estimating the coefficient of oil and gas saturation is the use of the Dakhnov -Archi equation, where input parameters are the porosity coefficients, resistance, and empirical coefficients m, n. When constructing a petrophysical model, especially when interpreting the nature of saturation, in horizontal wells it is necessary to take into account the influence of various factors on the logging data. Estimation of the oil and gas saturation coefficient may become more complicated in the case of low contrast of resistance between water-saturated zones and zones with the presence of hydrocarbons. In this paper, an example of successful resolution of a similar problem in a target interval with low resistance values is considered using the advanced set of logging methods in the drilling process. A detailed analysis of the data obtained during the drilling process made it possible to clarify the saturation coefficient in the low-resistance section, and also identify the saturation coefficient in areas with free water below the level of oil-water contact (OWC).
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Application of Horizontal Wells in Unconsolidated Reservoirs
By N. IvantsovSummaryField tests show that screens in horizontal wells limit the sand production, but do not prevent the destruction of rocks in the reservoir. The analysis indicates geomechanical issues are constantly occurring in the reservoir. In the process of water cut development while waterflooding, a sharp increase in sand production indicates geomechanical issues have place not only in near-wellbore zone, but also in remote areas of the formation. As a result of the rock destruction in the channels of filtration between wells, there is an accelerated increase in water cut, a risk of a water bypass event arises. Negative geomechanical issues, enhanced by reservoir heterogeneity and viscous instability of the displacement front, lead to a sharp decrease in sweep efficiency and eventually to decrease in final recovery. The performed laboratory geomechanical experiments and combined geomechanic-hydrodynamic modeling allowed to estimate geomechanical risks for different geological settings and to develop optimal modes of horizontal wells operation in the conditions of unconsolidated reservoir of the field under consideration
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Look behind the Borehole Wall. Resistivity Images while Drilling
Authors S. Kochneva, V. Sayfitdinova, V. Dunaev, V. Baryakh and V. PermyakovSummarySpecial characteristics of carbonate formations, i.e. complex structure of pore space, inhomogeneity of reservoir properties, etc. determine the processes of geological reserves allocation, field development and oil and gas production. For each perspective formation, it is necessary to adopt its own drilling strategy with optimized suit of geosteering methods. In this paper, several examples of well placement jobs for different stratigraphic units (Bashkirian stage, Tournai stage and the Famennian) with usage of resistivity images while drilling service were discussed. Trajectory change decisions depending on the position of sweet spots and in accordance with identified by the images structural dips were analyzed. Resistivity imaging while drilling service provides an opportunity of acquisition of high quality borehole wall images that could be used for a variety of tasks, such as for geological model adjustment in real-time, trajectory changes while drilling, etc. That method is very suitable for thin laminated formations (such as carbonates) and is irreplaceable in the palette of geosteering techniques.
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The Results of the Geophysical Work and the Introduction of A Multi-Sensor System for Permanent Monitoring of Horizontal Wells Novoportovskoye Oil and Gas Condensate Field
Authors V.O. Kosolapov, V.I. Virt, D.R. Bakhitov and R.R. BadgutdinovSummaryThe report describes the results of field and geophysical studies at the Autonomous field, the problems of oil and gas condensate field development, the importance of geophysical control over the development and implementation of multi-sensor technology for the registration of the wellbore in real time
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Well Treatment Formation Zone with Foaming Composition to Reduce Associated Gas Production in the Development of Oil and Gas Condensate Field
Authors D.R. Bakhitov, V.I. Virt, V.V. Ilikbaev, E.N. Pavlov and V.O. KosolapovSummaryThe results of the study is the gas-blocking properties of the compositions on the core are described. The hydrodynamic reservoir model is adapted to the study data. The simulation of well treatment with the use of different compositions and different volumes was carried out. The optimal design of well treatment was developed, according to which horizontal well were treated.
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Unconventional Approach to Resistivity Inversion for Real-Time Well Placement and Geosteering in Complex Geology
Authors A. Mosin, V. Mogilatov, I. Kuvaev and I. UvarovSummaryProactive geosteering involves having deep reading LWD measurements sensible to the surrounding formation and software for processing upcoming data in real-time. Electromagnetic (EM) measurements or resistivity measurements obtained from LWD EM tools contain sufficient information and are widely used in proactive geosteering. The iterative process of running forward modelling computations in order to obtain model parameters which are matching the real-time resistivity measurements is called deterministic inversion. Deterministic inversion method requires significant computing power and may result in slow performance on geosteering engineers’ laptops. This paper proposes to use unconventional approach to inversion (linearized inversion) that uses linear approximation of forward modeling in horizontally-layered formation based on modified Born and Doll approximation. Application of linearized inversion approach shows good performance and reliable results for real-time proactive geosteering.
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Close Proximity Well Monitoring and Potential Well-To-Well Collision Avoidance Technique Using Reservoir Mapping while Drilling
Authors N.E. Vedernikov, E.A. Bolychev, D.S. Leontev and A.S. ShakirovaSummaryGeological constrains quite often compel to drill wells with reduced center-to-center distance. Managing well to well collision risk is a complex challenge when the potential collision zone is located in the horizontal section of the well, with uncertainties in the range of +/- 20 m. Reservoir mapping technology was intended to be used as unconventional method to reduce the risk of collision to an acceptable level. This paper describes the non-traditional utilization of reservoir mapping while drilling technology. It would be of benefit when planning horizontal wells in close proximity, especially ones above/below one another as demonstrated in our case study. Case study is presenting the drilling horizontal well in 15 m center-to-center distance from completed horizontal well minimizing risks of collision and vertical uncertainty.
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Determination the Geosteering Difficulty Index (Gdi) and Well Classificaiont
Authors M. Golovchenko, K. Kudashov, V. Filimonov and T. RakhimovSummaryBased on 8000 drilled wells the critical factors were determined, influencing of geosteering efficiency, and their contribution were defined. The method of estimation of geosteering difficulty index (GDI) of horizontal wells is created. The classification of wells according to GDI were done, which will further allow us significantly optimize the resources in the planning and drilling of horizontal wells (design documents, time, personnel, composition of BHA, etc.) and improve the efficiency of geosteering.
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Optimize New Drilling in Uncertainty of the Geological Basis
Authors A.Y. Sentsov, I.V. Ryabov, N.S. Polyakova, A.A. Ankudinov and S.I. GrachevSummaryDrilling of horizontal wells is economically more efficient than drilling directional
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Modern Technologies of Horizontal Wells Survey: Comparison of the Effectiveness of Methods, Technologies and Approaches
By I. NovikovSummaryMarker technologies for determining well flow profiles are made based on quantum reporter markers located in the polymer shell of the proppant or in the granulate used in the production liner. The data obtained with the dynamics of changes in the flow profile over time allows us to optimize the grid of the wells during field development. A marking agent containing quantum dots can be applied both to the proppant (in the case of multiple hydraulic fracturing) and integrated into cemented and non-cemented liners, for multibranch wells according to all TAML classifications. The marker research method for building well flow profiles based on markers has several advantages over traditional logging and allows solving the following tasks: • Building an inflow profile in wells with cemented and non-cemented liners without fracturing. • Create an inflow profile in wells with multiple hydraulic fracturing. • Determine the contribution of each zone or wellbore (in multibranch wells) to water and hydrocarbons. • Identification of high water cut formations. • Localization of remaining oil in the reservoir. • Increased oil recovery factor. • Further development of fields, considering the uneven use of oil in the reservoir.
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Generalization of Design Solutions and Actual Experience in the Implementation of Development Systems with Multistage-Fracturing and Multilateral Wells
Authors I. Sokolov, A. Kokorin, V. Kramar and A. MoskalchukSummaryCurrently, technologies for the construction of horizontal wells with multistage hydraulic fracturing and multilateral wells are being actively used to develop fields in Western Siberia. At the same time, the used waterflood systems are often not adapted to the use of these technologies. Maintaining reservoir pressure, in most cases, is conducted by standard injection wells. The use of horizontal injection wells is quite rare and has the status of pilot work. Well placement is carried out according to classic development systems invented for vertical wells. The report summarizes the experience of designing and actual implementation of development systems using horizontal wells with multi-stage hydraulic fracturing and multilateral wells in the fields of LUKOIL-Western Siberia LLC, conclusions and recommendations were made.
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Complex Approach to the Development of Unconventional Reservoirs in the Republic of Belarus
Authors P. Povzhik, D. Serdziukou and A. HaletskiSummaryStarting from 2017, Belorusneft is actively working on the study of non-traditional collectors in order to assess the prospects for their industrial development. To date, considerable experience has been gained in studying unconventional reservoirs of I-III packs of the Rechitskoye field, obtained as part of a comprehensive research program, which allowed substantiating the drilling of an appraisal well and moving from cameral to field work. This article will present the main approaches to the study of unconventional reservoirs, based on the integration of core study methods, well logging and seismic data. Integration of methods for studying unconventional reservoirs allows you to remove a number of geological uncertainties, to determine the most favorable (potentially productive) areas for well placement.
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Integrated Approach for Monitoring of Sagd Wells Efficiency Basing on the Optical fiber Temperature Sensing and Geochemical Monitoring of Production
Authors M. Shipaeva, V. Sudakov, А. Lomonosov, D. Nurgaliev and S. UsmanovSummaryOne of the most effective technologies for extracting super-viscous oil is Steam-Assisted Gravity Drainage technology (SAGD). SAGD involves a pair of horizontal wells which drilled into the oil reservoir, one a few meters above the other. The length of horizontal sections on heavy-oil deposits in Tatarstan is 700-1000m. The deposit considered is heterogeneous from the point of view of lithology and saturation. Since SAGD wells are expensive and the horizontal wellbore filter is very long, to make SAGD profitable, it is necessary to optimize the downhole equipment. Special attention should be paid to determining the intervals of flow of a horizontal well and distribution of the drainage areas in the reservoir. In the process of industrial implementation of the SAGD technology, it becomes necessary to establish the optimum injection point for steam and a pump in horizontal wells. The proposed approach allows increasing the effectiveness of horizontal wellbore in the heavy-oil fields. Distributed Temperature Sensors (DTS) are widely used in Tatarstan. In this paper, the joint use of the results of DTS and an innovative approach based on geochemical monitoring of the process of developing heavy-oil fields to address some of the shortcomings in the use of DTS is considered.
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Fracturing Engineering in Limited Data Conditions - Diagnostic Injections by Coiled Tubing in a Low-Permeability Reservoir
Authors A. Lisitsyn, A. Bochkarev and N. ParshinSummaryThe coupled use of CT and Fracturing fleets made it possible to successfully conduct a Step rate test, which resulted in determination of closure pressure in ultra-low permeability conditions. Obtained results were used to adjust the 1D geomechanical model, as well as the plan of the multiple hydraulic fracturing. Second aspect of CT fleet usage during the multi-stage hydraulic fracturing treatment is bottomhole pressure monitoring, which is used to prevent critical situations.
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The Algorithm for Calculating a Multi-Stage Hydraulic Fracturing for a Horizontal Well
Authors R.R. Kopeikin and A.M. ShagiakhmetovSummaryAn algorithm for calculating a multistage hydraulic fracturing for a horizontal well is proposed. An analysis of various methods for calculating the flow rate of horizontal wells was carried out: Joshi, Dikken, Guo. In result, models, that give the most approximate result to the production data, were chosen. Also method of calculating the optimal number of fractures in a multi-stage hydraulic fracturing was tested. All calculations were made for the conditions of the oil and gas condensate field of the Yamal-Nenets autonomous district.
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Markers Technology Implementation Improves Western Siberia Field Development
Authors K. Saprykina, A. Anopov, E. Malyavko, K. Ovchinnikov and I. FedyainovSummaryDrilling and completing horizontal wells are the global trend and a key technical solution to improve hydrocarbon production. The objectives of production logging in horizontal wells are the following to obtain data about petroleum reservoir, to evaluate its properties and to forecast the dynamics of hydrocarbon extraction. In this regard, the contribution of wellbore intervals to the total well production is an essential knowledge for operating companies. This article provides an overview of using markers technology as an alternative method of production logging in horizontal wells based on results of implementation in Western Siberia oilfield development.
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Evolution of Completion and Continuous Monitoring Systems for Extremely Long Horizontal Wells on the Example of the Y. Korchagin Field
Authors A.A. Senkov, O.I. Abramenko, M.T. Nukhaev, I.R. Mukhametshin, A.R. Galimzyanov and E.V. PopovaSummaryDespite the significant development of drilling technologies (currently there is an opportunity to drill wells with a large departure from the vertical and significant penetration through the reservoir), there is a fairly wide range of issues related to the completion and monitoring of fluid inflow in horizontal wells. This paper presents the experience of LUKOIL-Nizhnevolzhskneft in the implementation of various completion and continuous monitoring systems for extremely long horizontal wells at the Y. Korchagin field located on the shallow shelf of the Northern Caspian Sea.
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Advanced Inflow Profiling Technologies
Authors E.V. Pitsyura, R.R. Enikeev, D.V. Orlov, O.N. Zhuravlev and R.S. UmurzakovSummaryThe paper describes the use advanced technologies for monitoring the inflow profile of production wells. The technologies are based both on the inclusion of the flow metering devices into the completion and on the installing of the flow metering devices into already working wells. The work was carried out to monitor the operation of production wells, finished with wire and mesh filters, including the multilateral wells. The inclusion of tracers into the completion was carried out to measure the inflow rate of oil and water, including to assess the productivity index of each interval or each well in the multilateral separately. After the wells are put into operation, sampling of the well fluid at the wellhead and regular analysis of the content of tracers allows determining the interval profile of oil and water inflow. The work was carried out at several dozen wells of the Russian, Okunevskoye, Vaneganskogo fields in 2016 - 2019 (work continues - scaling). The results of real-time flow profiling are shown, including studies of the productivity index of each interval as well as each well in multilateral wells.
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Experience of the Participation in the Import-Substituting Technologies Development and Implementation Project: Logging while Drilling
Authors V. Kolesov, V. Voltornist, M. Latypov, K. Sklyar and N. KayurovSummaryThe paper describes the results of the pilot-testing of the logging while drilling (LWD) using LUCH-M-2014 on the OOO “RN-Yuganskneftegaz” locations. There is showed the service organization complexity during the drilling, which affected the quality of the data of the first wells. There are described the problems and applied solutions for the working process improvement. Due to the conducted work the first approved by the Public Joint Stock Rosneft Oil Company and by the National Reserves Committee of the Federal Subsoil Management Agency national producer of logging while drilling equipment has entered the domestic market. The expected effect for OOO “RN-Yuganskneftegaz” during 2019-2020 should be saving up to 40 000 hours annually for the inclined wells construction.
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Design of Logging-While-Drilling Data Quality Analysis Algorithms for A Geosteering Software Module
Authors A. Perlova and A. KarimovSummaryIt is quite common for LWD tools to be unstable and the acquired data to be of poor quality. Poor quality LWD data could lead to inaccurate assessment of reservoir properties and net pay, which consequently lead to incorrect decisions during geosteering, uncertainties in completion and wrong assessment of expected productivity of wells. In the paper, authors discuss possible approaches for LWD data quality control and propose algorithms for its creation as a QC module in a geosteering software. This module is expected to be used in order to minimize the uncertainties connected with poor quality LWD data.
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Geomechanical Support of Well Drilling in the Samotlor Field
Authors D. Malyutin, O. Grachev and A. PuchkovSummaryAgainst the background of the continuing decline in total oil production in Western Siberia, the importance of horizontal wells and sidetracks is increasing, especially in the fields that have been developed for a long time. One of these fields is the giant Samotlor field, discovered in 1965 and having a multi-layer structure with locally developed areas of both reduced reservoir pressure (because of long-time development) and increased reservoir pressure (due to the uncompensated effect of water injection). These facts complicate the drilling of wells with large zenith angles, narrow the safe drilling window and ultimately lead to non-productive time. In 2018, Samotlorneftegaz JSC decided to use geomechanical support in the drilling process for complex objects. A full cycle of geomechanical support includes pre-drilling analysis, 1D geomechanical modeling, geomechanical support and post-drilling analysis. The article presents the algorithm of geomechanical support and some results.
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Optimal Duration Planning of Well Tests for Horizontal and Fractured Wells
Authors P. Glechikov and S. FedotovSummaryThe problems of planning of well tests by the methods of pressure build-up or drawdown curves registration are considered in the article.The existing approaches to the estimation of the time of the radial filtration start are analyzed. Based on the results of modeling and analysis of actual examples of the studies, a criterion of achieving the start time of the radial fi ltration depending on the productivity for horizontal and fractured wells was obtained.Examples of using the obtained relationships to assess the reliability of PBU interpretation parameters are presented
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Selection of Optimal Sidetracking Options for Underground Gas Storage Wells
Authors E. Kotlyarova, A. Ermolaev and S. EfimovSummaryThe aim of the work is to develop an algorithm for selecting options for side-chasing (horizontal) wellbores in underground gas storages. Unlike the existing methods, similar in purpose, the algorithm selects the most cost-effective options and distributes them across a group of wells that are connected by a general requirement for the total peak gas withdrawals from the underground gas storage.
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Identification of Flow Zones by Spectral Noise Logging in Horizontal Wells at A Low Differential Pressure
Authors R. Minakhmetova, V. Pimantyev, S. Vasilyev, N. Boltunov and A. ShkaranSummaryNowadays profitable oil production from low-permeable reservoirs is possible only by reservoir development acquiring horizontal wells. One of the methods for controlling the parameters of fluid drainage into horizontal wells is a conventional production logging survey consisting of mechanical spinner, temperature survey etc. Production flow profile identification in the horizontal wells drilled to carbonate reservoir is challenged not only by the influence of complex well construction, but also by low specific inflows along a horizontal well. This paper presents some cases on production profile identification in producing horizontal wells at low pressure drop, which were surveyed by spectral noise logging to detect active reservoir zones along the horizontal wellbore. Temperature modelling was used to quantify the inflow profile in these cases. All performed surveys consisted of gas lift based flowing and shut-in measurements in order to increase the informative and accuracy of the production logging survey.
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Integrated Interpretation of Well Log Data, Multilayer Bed Boundary Detection Service and 3D Seismic Inversion for Purposes of Well Planning and Well Placement of Horizontal Wells
SummaryTyumenneftegaz together with the Schlumberger successfully carried pilot project on well planning and well placement of horizontal wells using methodical approach of integration of well log data, 3D seismic data and Multilayer Bed Boundary Detection Service
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Optimization of Multilateral Wells Drilling Technology with Hybrid Multistage Hydraulic Fracturing for Achimov Deposits
Authors A. Evdokimova and D. PerminovSummaryIn this work the concept of reservoir development of the Achimov formations is considered. It consists the drilling of multilateral wells and carrying out a hybrid multistage hydraulic fracturing unit in them. The main aim of this approach is to increase the drainage area and maximize the efficiency of development reserves. In addition to this, the construction of a multilateral wells in comparison with two separate horizontal wells is economically viable and also it allows to reduce the number of slots on the cluster pad. In turn, the hybrid multistage hydraulic fracturing allows to create an extensive network of cracks by changing various injection fluids at high speeds. Consequently, this approach lets to technological (increase of oil recovery) and economical (cheaper) efficiency. It can be recommended to the development of Achimov formations.
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Modern Mudlog Usage in Horizontal Drilling for Complex Eastern Siberia Geology
Authors V. Vorobyev, A. Kushnikov, M. Podberezhniy, A. Rotaru and V. BakhurskiySummaryIn the season 2018-2019 at Ignyalinskoye field of Gazpromneft-GEO, pilot works were carried out to apply the technology of the modern mudlog. In addition to high-precision gas logging, a modern complex of research of mud was used, which allows to quickly determine its elemental and mineral composition. Based on the logging and mudlog data, the properties of the reservoir and the points of the packers for hydraulic fracturing were determined. The data of the modern mudlog can be used for well placement and allocation of reservoirs, which allows to optimize the work program for the well and reduce the cost of its construction. Only within the framework of pilot works, it was possible to reduce the cost of the well by 4.5%.
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Using of Seismic Data for Geosteering During Drilling of Extra-Long Horizontal Wells on Caspian Shelf
Authors P.F. Popova, N.V. Buleeva, M.J. Golenkin and A.S. ShtunSummaryAt last years on Caspian shelf of Russia were discovered some oilfields in terrigenous and carbonate rocks in wide stratigraphic range - from middle Jurassic to Paleogen.
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Analysis of Multifrac Gas-Condensate Accumulations at the Stage of Additional Exploration in the Fields of Eastern Siberia
Authors K.V. Pushnikov and R.R. SafinSummaryAnalysis of multifrac gas-condensate accumulations at the stage of additional exploration in the fields of Eastern Siberia
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Development of Well Completion Technologies at Verkhnechonskoye Oil and Gas Condensate Field
Authors N.V. Manshin, A.N. Levanov, A.S. Smirnov, N.A. Ignatiev, S.A. Yashchenko, G.V. Grekov, A.I. Budko and A.S. ChirgunSummaryDevelopment of well completion technologies at Verkhnechonskoye oil and gas condensate field
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Features of the Development of the Ach6 Object at the Imilorskoye Field Using Multi-Stage Fracking Technologies. Problems, Technological Solutions
Authors A.V. Bukharov, E.N. Malshakov, N.V. Boldenko, V.I. Shalamova, A.V. Kuznetsov and E.V. ShkandratovSummaryFeatures of the development of the Ach6 object at the Imilorskoye field using multi-stage fracking technologies. Problems, technological solutions
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Technological Techniques for Conducting Geophysical Studies of Existing Horizontal Wells, Taking Into Account the Geological Field Conditions of the Field and Tasks
Authors R.K. Yarullin, R.A. Valiullin, A.R. Yarullin, A.S. Ramazanov and T.R. HabirovSummaryTechnological techniques for conducting geophysical studies of existing horizontal wells, taking into account the geological field conditions of the field and tasks
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Hindsight Analysis of Field-Analogues, As An Instrument for Further Survey Buildup Aiming to Make Business Decision Refer to Large-Scale Oil and Gas Projects at Appraisal Stage
Authors D. Tengelidi and L. GaydukovSummaryGeological models based on well data and 3D seismic are insufficient instruments for making strategic development decision relative to fields / reservoirs with very complex reservoir architecture (deltaic/continental deposits). An addition knowledge can be received from analogue field study but is often restricted by superficial comparison of basic characteristics that do not answer to the question about optimal field development.
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Practical Aspects of Using the Results of Well Log Data interpretation in Horizontal Wells
Authors E. Shkunov, A. Chashkov, E.Cherepanova Cherepanova and S. MutaevSummaryThe proposed algorithm for processing the azimuthal density image makes it possible to obtain more reliable information about the petrophysical properties of the reservoir and to clarify the effective thickness of the lithotypes crossed by a horizontal well. In relation to horizontal wells, a comprehensive analysis of well log data, the azimuthal density image, 3D seismic data and surface logging results makes it possible to more reliably determine the position of faults. The information obtained was used to adjust the well completion scheme, as a result of which a positive effect was obtained during hydraulic fracturing. The structural interpretation results clarified the fault and structural models.
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Аggregation of 2D and 3D Approaches in Planning and Geological Monitoring of Drilling Horizontal Wells and Sidetracks in Llc «Bashneft-Dobycha»
Authors A. Petrov, A. Nugaeva and A. SuleymanovSummaryOne of the most effective methods for brown-field development optimization is drilling horizontal wells or sidetracking with the purpose to involve into development remaining recoverable oil reserves.Conventionally, analytic approach (2D) based on initial and remaining oil thicknesses maps is used for evaluation of remaining recoverable oil reserves when planning new wells and sidetracks. In this case production rates are calculated with following assumptions: reservoir properties are homogeneous, pressure, volume and temperature fluid properties are constant, reservoir pressure and oil saturation also are constant in well drainage area.It should be noted that, planning and implementation of well drilling projects in PJSC Bashneft Oil Company are based on complex approach, including:- analytical evaluation (2D) of remaining recoverable oil reserves,- 3D - reservoir simulation for reliable calculation of remaining recoverable oil reserves and determination of well drilling efficiency, - geological monitoring of well drilling in real time. Complex approach application consisting of 2D-analytical and 3D - numerical methods improves evaluation reliability of remaining recoverable oil reserves and allows to perform multivariate well predictions of oil production taking into account all existing geological risks.The detailed description of algorithms application for planning and implementation well drilling projects and obtained results will be considered in this work.
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New Solutions for the Implementation of Well Logging in Difficult Conditions
Authors A. Nazarov, I. Chernykh, A. Savich and A. ShumilovSummaryThe issues of well logging (in drilled and production horizontal wells) from the standpoint of their implementation in difficult conditions are considered. Proposed new technologies and special equipment to perform re-search in complex mining and geological conditions. The experience of the implementation of research by the Lateral technological complex of various modifications with different methods of stimulation of inflow is de-scribed. It is shown that the use of these technologies and special equipment allows to carry out research in hori-zontal wells with a full range of well logging and successfully achieve the goals.
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Improvement of the Effectiveness of Geosteering Using A Comprehensive Analysis of Seismic Data
Authors G. Kazantsev and K. ZaboevSummaryIn this paper, the authors propose a new approach to determine the most likely position of a well in a seismic field and, as a result, to refine structural plan in the drilling area. Authors identify the relationship between petrophysical parameters obtained during drillingandprognostic propertycubes, which are obtained as a result of deterministic simultaneous inversion.
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Development Optimization of Hard-To-Recovery Hpht Fields Using Horizontal Wells with Multistage Hydraulic Fracturing
Authors Y. Golovatskiy and T. KryuchkovaSummaryIn recent years many Russian oil companies in order to maintain stable production started to develop tight and particularly low permeability fields. Most of the tight fields in Russia were discovered in the 70s - 80s, but were not developed due to the presence of other more accessible and cheaper alternatives and also due to the lack of economically viable technologies. Improvement of technology of drilling horizontal wells with multistage hydraulic fracturing and tax incentives for tight field development allowed Russian oil companies to begin active development of the fields which were previously of no interest for economic reasons. Improving the construction of horizontal wells with multistage fracturing and the introduction of tax incentives for the development of hard-to-recovery fields allowed Russian oil companies to begin active development of fields that had not previously been of interest for economic reasons. The example of Achimov formation development shows solutions to optimize the development, which allowed to move from drilling horizontal wells of small length with multiple hydraulic fracturing to wells with a longer horizontal section with significantly reducing the number of wells. Technical difficulties that were solved for successful drilling and completion of elongated wells under HPHT conditions were discussed.
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Multilateral Wells Under the Combined Column As A New Stage of Drilling Technologies
Authors D. N Sirotin, I.A. Grunov and I.R. MukhametzyanovSummaryThe combination of modern technological solutions described in this work allowed to reduce the capital costs of well construction. Two sections: a production column and a liner are combined into a combined production column, as well as an integrated technology for the construction of multilateral wells of a new design - "fishbone" allowed to significantly reduce the time of the entire well construction cycle.
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Optimization of Development of Oil and Gas Rims Using New Technologies
Authors Y. Golovatskiy, T. Kryuchkova, A. Gryaznov and I. IshimovSummaryThe presented novel approaches for oil and gas rims development enable the increase in hydrocarbon extraction using multilateral horizontal wells. Based on 3D static modelling results, it became possible to trace multilateral well trajectories of several types, which can enable much higher oil recovery efficiency. The important point was implementing appropriate well completion selection, which will increase the production efficiency by alignment of the inflow profile along a wellbore and isolation of undesirable water breakthrough intervals. The correct choice of inflow control devices (ICD) allows to get more uniform recovery of reserves. The proposed well completion design workflow is flexible to variable geological and technological factors and allows the ability to apply sophisticated well construction. Additional installation of the sliding sleeve for multiple hydraulic fracturing ports enables to make either acid fracturing (for carbonates) or proppant fracturing (for clastics) separately in any chosen interval. The comparative analysis of well performance showed that the performance of the designed horizontal wells in term of cumulative oil recovery is much higher versus conventional vertical wells. This enables the development of a deposit by less number of wells and ensures its economical efficiency, even despite of higher horizontal well price.
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Strongly Improving Hole Cleaning Management in Highly Deviated and Horizontal Well Using Surface Cuttings Rate Measurement Technology
Authors A. Kushnikov, E. Carcione, A. Martocchia, D. Monteiro, D. Partyko and A. AykasSummaryThis paper covers actual instances of how the service reduced potential NPT/ILT through identified and mitigated issues related to real time hole cleaning, drilling and hydraulics optimization, correct hole volume for cementing, and in some extend the effectiveness and efficiency of viscous pill for stuck pipe avoidance in horizontal and extended reach wells.
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Problems of Interpretation of the Welltest of Horizontal Wells
By D. ListoykinSummaryThe paper presents the experience of Gazpromneft in the interpretation of well testing (hydrodynamic studies of wells) of horizontal wells, horizontal wells with multi-stage hydraulic fracturing.
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Petrophysical Rock Properties of Botuobinsky Horizon Based on Results of Studies in Vertical and Horizontal Wells of East-Siberian Field
Authors A. Fadeev and T. DolganovaSummaryBotuobinsky horizon lithological and petrophysical properties research results are presented. The paper shows the results of comparative analysis of laboratory study of cores from several vertical wells and one horizontal well. Also, a conclusion has been drawn on the similarity of petrophysical properties of differently directed wells
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