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Horizontal Wells 2019 Challenges and Opportunities
- Conference date: May 27-31, 2019
- Location: Kaliningrad, Russia
- Published: 27 May 2019
41 - 60 of 74 results
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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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