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Horizontal Wells 2019 Challenges and Opportunities
- Conference date: May 27-31, 2019
- Location: Kaliningrad, Russia
- Published: 27 May 2019
1 - 20 of 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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