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Horizontal Wells 2021
- Conference date: May 24-28, 2021
- Location: Online
- Published: 24 May 2021
51 - 68 of 68 results
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Management of the development of the Tazovsky oil and gas condensate field with a thin oil rim of high-viscosity oil with a massive gas cap
SummaryThe PK1 formation of the Tazovsky NGCM is a massive gas deposit with a thin oil rim, underlain by water over the entire area The field development strategy provides for the simultaneous operation of the oil rim and the gas cap. The involvement of oil fringe reserves is supposed to be realized by a grid of horizontal and multi-hole wells (the length of the GS is ∼2000 m, the MZS is 4000 m). To draw in the gas cap reserves, it is proposed to introduce horizontal gas wells (length 1500 m)
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Horizontal wells of considerable length as the only possible solution for the cost-effective involvement of high-viscosity oil reserves in the development of the thin oil rim of the Tazovskoye field PK formation
SummaryIn general, the experience of the development of continental deposits shows that the approach to drilling should be iterative, i.e. accompanied by continuous analysis of the data obtained and improvement of further drilling technology and strategy as training and experience gain, development and operation of horizontal wells of considerable length and wells of more complex design (MZS, FB).
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Automation of the construction of geosteering models adapted for LWD data
Authors N.A. Palchikovskaya, A.S. Trushin, N.S. Ismagilov and E.V. VarzegovSummaryOriginal geosteering model i.e. simulated geological section contains uncertainty, that is reflected in the discrepancy between the model data along the horizontal well and the actual logs. In order to remove discrepancy geosteering specialists manually correct the structure of the section using specialized software. However, it is a laborious and time-consuming process,that is why the automation of the construction of geosteering models adapted for logging while drilling (LWD) data is actual nowadays. This paper presents an algorithm, which automatically corrects the structure of the section and provides the model, which is transformed in such a way that sampling along the well gives a synthetic log approximately coinciding with the actual log. The algorithm has additional functionality that allows to set the user's requirements to the final model.
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Goomechanics as part of integrated approach of HW drilling
More LessSummaryIn the age of digitalization and artificial intelligence, the main challenge is to provide a cross-functional integration: any updated data have to be considered by all team in order to reduce risk, time and cost. This article introduces case of drilling horizontal wells with integrated approach to optimize drilling performance in Eastern Syberia which reduced drilling time more than twice. Geomechanical model was used as integration tool of geophysical, drilling, logging, coring, testing and fracturing data.
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Feasibility study for optimizing the design of double-barrel wells of the D33 field on the Baltic Sea shelf
Authors N. V. Krivosheev, N. N. Krivosheeva, R. A. Shadchnev and D. N. SharapovSummaryDrilling of offshore oil and gas wells remains one of the most important activities of the Russian oil and gas industry in the coming years. The issue of geological exploration and the profitability of the development of offshore fields is still acute. The D33 field is located on the shelf of the Baltic Sea within the boundaries of the Baltic license area. The depth of the sea within the field varies from 60 to 80 m. The purpose of the work is to increase the efficiency of drilling wells and the profitability of the development of offshore fields by optimizing the design of double-barrel wells. Several schemes of drilling of the D33 field with the reconstruction of the well trajectories are proposed. Technical and economic calculations were performed, which resulted in optimization of the design of double-barrel wells at the D33 offshore field. The cost of well construction was estimated according to the basic and optimized version, the results showed that the savings in the construction of a well according to the optimized version will be 5.5%.
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Application of The Controlled Radial Drilling Technology in The Tournaisian Reservoir at PJSC «Tatneft»
Authors I.Z. Farkhutdinov, A.I. Bashirov, A.K. Abdullin, V.A. Makarenko and I.R. GalasSummaryIn October 2020, PJSC Tatneft carried out pilot work on drilling radial channels with subsequent acidizing at the Novo-Elkhovskoye field. This technology was tested in the Tournaisian carbonate reservoir. As a result, it was possible to more than double the productivity index of the wells and to increase the oil production rate at one of the two wells. At the same time, unforeseen factors were identified in the course of work for the second well, which made it possible to gain additional experience and revise the criteria for selecting a potential well stock. This article describes the work that was first carried out in the above productive formations. Based on the results of the work carried out, the set geological and technical tasks were completed, further pilot work is planned in order to determine effective methods and technology application boundaries. Terrigenous reservoirs are considered, as well as reservoirs with a thickness of 2.5 meters and higher. It is also planned to perform hydrodynamic simulation to determine the optimal length of channels in specific geological conditions, to assess technical and economic performance.
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Development of an approach for hydraulic fracturing operations and a decision-making methodology in the Sredne-Nazymskoye field
Authors A.M. Yanaev, A.I. Lisitsyn, P.V. Lupanov, D.A. Korobitsyn, V.B. Karpov and N.V. ParshinSummaryThe object of the research is the Upper Jurassic deposits YuK-01 of the Sredne-Nazym field. The main features of the Yak-01 Upper Jurassic deposits are the complexity of the structure of the deposits, high heterogeneity of properties along the section, lateral and ultra-low matrix permeability. Currently, it remains relevant to determine the approach to the development of hydraulic fracturing designs in the field. The main difficulty is the lack of research, which makes it difficult to find solutions at the design and execution stages. An incomplete set of well logging leads to the impossibility of building a correlation between well flow rates and hydraulic fracturing designs. At the initial stage of development, vertical wells were completed with hydraulic fracturing using a "standard" design. “Standart” design is an injection schedule of 30 tons of proppant with a constant increase in the concentration of proppant (hereinafter CSP), injected onto a cross-linked gel with a flow rate of 3.5–4.5 m3/min, which limited the possibility of changing other technological parameters’ hydraulic fracturing, such as: volume and viscosity of the liquid; the volume of the buffer stage; mass and concentration of proppant, etc. This article presents the developed approach to the design of hydraulic fracturing schedules in the Sredne-Nazymskoye field and the results of its application. Additional attention is paid to highlighting the process of developing hydraulic fracturing schedules, as a result of which the proposed approach was developed.
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Complex cross-segment modelling approach applying for productive increase of horizontal wells with multi-stage hydraulic fracturing in Achimov formation conditions
Authors D.I. Torba, A.I. Lisitsyn, A.K. Gula, A.V. Bochkarev, A.E. Glazyrina, Yu.S. Berezovskiy and D.V. MetelkinSummaryAchimov deposits development is always a challenging process that frequently requires application of innovative approaches. Horizontal drilling in non-uniform lithology is frequently accompanied by circulation, wellbore stability losses and other complications. Hydraulic fracturing stimulation does not always result in productivity increase, which reduces profitability of development. Due to the incomplete understanding of geological and geomechanical specifics of Achimov deposits, - formations with complex heterogenous structure, low permeability, presence of low-amplitude structural dislocations, - the controlled use of features of formation is hindered and, in turn, makes it necessary to develop an innovative strategy of their surveillance and stimulation. In purpose to optimize an existing development strategy of Achimov deposits in Vingayakhinskoe oilfield, we have developed and applied an approach involving complex cross-segment modelling. 1D and 3D geomechanical models have been built in view of the applied approach. Development of hydraulic fracturing designs, efficiency of which has been evaluated with respect to such reservoir modeling results as predicted production rate and cumulative production, have been the next step, performed for different geological and geomechanical conditions. Thus, the principal feature of applied approach is coupling between geomechanical modeling, complex multivariant hydraulic fracturing modeling and reservoir modeling with the target to maximize production.
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Quality control and correction of magnetic directional measurements while drilling horizontal wells
Authors A. Kashirin and T. BataevSummaryPrinciples of magnetic directional surveys, QA\QC and correction using SC, MSA and BHA Sag methods. Examples of utilizing during real wells drilling.
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Application of geomechanical modeling tools to create a reservoir pressure model and reduce drilling Accidents at a oilfield in the northern part of the Yamal-Nenets Autonomous District
Authors A.E. Melkov, A.E. Glazirina, A.K. Gula, Yu.V. Ovcharenko and A.V. BochkarevSummaryThe main purpose of this work is to create a model of reservoir pressure to reduce accidents during drilling (gas occurrence, drilling fluid absorption). The field has a complex geological structure, an increased coefficient of abnormal reservoir pressure in the target formations and zones of local increase in reservoir pressure The features of the oildield are: • Growth of reservoir pressure in the Achimov strata • Presence of a zone of increased anomaly coefficient in the Ach 17-0 formation (1,7–1,9) To solve these tasks, a combination of geomechanics and geological modeling methods is used
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Implementation of the technology of chromate desorption systems to optimize the position of the well relative to the contact boundaries in the development of oil rims
Authors P. Lyutoev, D. Kuznetcov, I. Nikishin, I. Platonov, M. Nukhaev and V. KabanovSummaryThis paper presents a new technology for determining the inflow profile during the development of oil rims using chromate-desorption systems, which makes it possible to solve one of the critical problems when using long horizontal and multilateral wells - optimizing the position of the well relative to the contact boundaries to prevent early water and gas breakthroughs.
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Results of pilot testing of technology for monitoring gas and water breakthrough intervals using chromate desorption systems in the development of fields in the Caspian Sea
Authors A. Senkov, O. Abramenko, I. Nikishin, I. Platonov, M. Nukhaev and V. KabanovSummaryThe presented work describes a new technology for detecting gas and water breakthrough in long horizontal wells during field development in the Caspian Sea. This technology made it possible to determine the intervals of gas breakthrough using a mini-chromatograph directly in the field and did not require processing in a specialized chemical laboratory.
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Unconventional reservoirs brittleness prediction for improving multistage hydraulic fracturing efficiency in horizontal wells
Authors I.Z. Karimov, B.S. Plotnikov, R.P. Volkov and D.S. IgnatovaSummaryUnconventional reservoirs, in terms of their totality of properties, are unique geological objects for which there are no generally accepted and widely tested effective methods for studying cores, interpreting well logging and seismic forecasting. For the effective development of this type of reservoir, as a rule, horizontal wells with multistage hydraulic fracturing are used, providing the maximum possible stimulated volume of rocks (SRV) and an increase in the initial and accumulated production rates. The result of hydraulic fracturing largely depends on the brittleness of the rocks and the presence of zones of natural fracturing. Prediction of these properties in the interwell spacing is a complex task that requires modern seismic processing and interpretation approaches
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Performance of casing connection for horizontal oil wells
Authors A. Agishev and A. NurgalievSummaryThere is a tendency to complicate drilling techniques in the Russian Federation and in the world. It is caused by increase the number of horizontal wells and increase the length of the laterals. Casing with thread connections while run in hole operation in deviated and horizontal wells are subjected to combined loads caused by axial load, bending load, differential pressure. The most critical point of casing string is the thread connection. 50%-80% compression efficiency of connection becomes insufficient. This article describes results of FEA (finite element analysis) for API Buttress and TMK UP CWB connections and full scale test for TMK UP CWB 177.8 х 9.19 N80.
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Improving the efficiency of horizontal wells research on the example of a horisontal exploration well at one of the exploration projects of GPN-GEO
Authors V. Bakhurskiy, V. Vorobiev and M. PodberezhnySummaryImproving the efficiency of horizontal wells research on the example of a horisontal exploration well at one of the exploration projects of GPN-GEO. Using of tracer research allows you to link geological data and assess the production potential of a horizontal well.
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The technology of a modern approach to the calculation of hydrocarbon reserves and risk assessment when drilling horizontal wells using all geological and geophysical information
Authors E.E. Radionova and A.G. AlekseevSummaryThe technology of a modern approach to the calculation of hydrocarbon reserves and risk assessment when drilling horizontal wells using all geological and geophysical information
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