Kataganskiy District
Geomechanical modeling and multi-stage hydraulic fracturing dolomite reservoir of the Verkhnechonskoye oil and gas condensate field
Kuleshov, Vasiliy (LLC Tyumen Petroleum Research Centre) | Pavlov, Valeriy (LLC Tyumen Petroleum Research Centre) | Pavlyukov, Nikolay (LLC Tyumen Petroleum Research Centre) | Musin, Evgeny (LLC Rosneft - Peer Review and Technical Development Center) | Cherkasov, Sergey (LLC Rosneft - Peer Review and Technical Development Center) | Samoilov, Mikhail (LLC Rosneft - Peer Review and Technical Development Center) | Khokhlov, Danil (JSC Verkhnechonskneftegaz) | Kozyrev, Alexander (JSC Verkhnechonskneftegaz)
ABSTRACT: Taking into account Biot constant and anisotropy of elastic properties of reservoir rocks, 3D geomechanical modeling was performed, integrated into the process of planning designs and execution of hydraulic fracturing/MSHF operations. The object under the study is represented by a low-temperature carbonate-dolomite reservoir, that complicate the process of developing hydrocarbon reserves by a system of horizontal wells with MSHF was carried out on them. The geological feature of the formation is the presence of clay barrier of insignificant thickness, which cause high risks of hydraulic fracturing breakthrough in the underlying highly permeable gas-saturated intervals. As a result, the construction of a high-quality geomechanical model and its synchronous adaptation together with hydraulic fracturing models become the necessary condition to achieve the planned goals of field development.
- Geology > Geological Subdiscipline > Geomechanics (1.00)
- Geology > Rock Type > Sedimentary Rock > Carbonate Rock > Dolomite (0.61)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock (0.48)
- Geophysics > Seismic Surveying (0.70)
- Geophysics > Borehole Geophysics (0.48)
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > Kataganskiy District > East Siberian Basin > Nepa-Botuoba Basin > Verhnechonskoye Field (0.99)
- Asia > China > Sichuan > Sichuan Basin (0.99)
Problem of Gas Breakthrough Solved through Installation of Recompletion Assembly with Autonomous Gas Inflow Control Devices AGICD in Oil Producing Wells
Ivanova, Ekaterina Yurievna (NPK Filtr LLC) | Khokhlov, Danil Igorevich (JSC VCNG) | Shangin, Andrey Viktorovich (JSC VCNG) | Nesterov, Pavel Vladimirovich (JSC VCNG) | Britov, Evgeniy Vitalevich (JSC VCNG) | Arzamastsev, Georgiy Georgiyevich (NK Rosneft PJSC)
Abstract During the field tests in oil producing wells at the Verkhnechonskoye field there were autonomous gas inflow control devices (hereinafter referred to as AGICD) applied for the first time as part of a recompletion assembly. The recompletion technology is based on a well completion design solution with AGICD which consists in dividing the liner into intervals, equalizing the total inflow and restriction of the inflow of adverse fluids in producing wells with increasing flowrates of adverse fluids as well as wells shut in due to water/gas breakthroughs. The recompletion assembly is run into the previously lowered liner equipped with sand screens and divided into several zones by swellable packers. The new assembly essentially features the classical completion assembly but comprising original 73-mm-tubing-based equipment such as a shoe, cup packers, a packer hanger, and centralizers. The equipment design allows for its complete retrieval if necessary. Since oil contains a lot of solids and deposits of asphalts, resins, and paraffins, the recompletion assembly has a flush valve enabling acid cleanout of the pay zone of the formation during the operation. In order to prepare for the recompletion assembly to be run in, intense analytical work was done to study the candidate wells and geological conditions and peculiarities of the Verkhnechonskoye field, to analyze the open hole logging data and the oilfield geophysics vs. its hydro-dynamic model data. During the field trials, recompletion assemblies were run in two wells of the Verkhnechonskoye field and monitored to assess their operation with AGICD within a set period of time. Then the equipment was pulled out and the wells were monitored again without AGICD. The findings provided the basis for the assessment of the equipment operation. The analysis of the trials results showed that the equipment is prepared, run in the hole and retrieved in normal mode. The qualitative AGICD performance indicators are based on the stable well operation within the total nonfailure operating time after the recompletion assembly is run in the hole. The quantitative AGICD performance indicators are defined by the achieved gas ratio decrease and oil flowrate rise. The trials also confirmed the convergence of the AGICD expected and field-proven performance indicators which makes it possible to plan precisely well operation modes when using recompletion equipment. The trials findings prove that the recompletion technology is reasonable for wells with high rates of non-targeted fluids as well as idling wells (due to water/gas breakthrough) to make them active again.
Organizing, monitoring, and operating a temporary underground gas storage at Verkhnechonskoye field in Eastern Siberia (Russian)
Ignatyev, N. A. (Tyumen Oil Research Center LLC) | Shvets, V. S. (Tyumen Oil Research Center LLC) | Levanov, A. N. (Tyumen Oil Research Center LLC) | Zakharova, E. V. (Tyumen Oil Research Center LLC) | Yaschenko, S. A. (Tyumen Oil Research Center LLC) | Zyryanov, K. M. (Verkhnechonskneftegas JSC) | Zavernin, N. V. (Verkhnechonskneftegas JSC) | Musin, R. A. (Verkhnechonskneftegas JSC)
Eastern Siberia is a relatively new and intensively developing oil and gas production region in Russia. One of the largest fields is the Verkhnechonskoye oil-gas-condensate field in the Irkutsk region. This field was launched into commercial development in 2008. With increasing oil production, there arose a question of associated petroleum gas utilization. The first design documents provided for the use of gas for own needs such as power and heat generation and oil treatment. However, that required only insignificant portion of produced associated petroleum gas. Building a commercial power plant to provide electricity to the north of the Irkutsk region and the Republic of Sakha (Yakutia), as well as supplying gas to the Sibur’s gas processing plant in Kirensk were also considered as possible solutions to the problem. However, significant amounts of power were unclaimed in the region, and the need to build an extended export gas pipeline threatened the project economics. To prevent air pollution by flaring and to preserve valuable fluids, it was decided to organize temporary underground gas storage by injecting the produced associated petroleum gas into a reservoir with the potential for future sales when the gas infrastructure of the region is developed enough. The accumulated experience, developed approaches and technological solutions can be applied to objects in Eastern Siberia with similar geological and physical characteristics.
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > Kataganskiy District (0.70)
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > Irkutsk (0.45)
- Reservoir Description and Dynamics > Storage Reservoir Engineering > Natural gas storage (1.00)
- Reservoir Description and Dynamics > Unconventional and Complex Reservoirs > Gas-condensate reservoirs (0.88)
- Facilities Design, Construction and Operation > Processing Systems and Design > Gas processing (0.88)
A Successful Experience in Using Short Gauge PDC Bits for Drilling with Point-the-Bit Rotary Steerable Systems under Geological Conditions of Verkhnechonskoye Field
Abaltusov, Nikolay Valerevich (Weatherford) | Garaev, Azat Zyavitovich (Weatherford) | Klabukov, Andrey Vyacheslavovich (Weatherford) | Averkin, Aleksey Viktorovich (Rosneft) | Pavlenok, Maksim Konstantinovich (Rosneft) | Smolin, Evgeniy Aleksandrovich (Rosneft)
Abstract The investigations, conducted by many companies, show that a long gauge PDC bits, which are used during operations with "point-the-bit" Rotary Steerable Systems (RSS), allows for mitigating the bit vibrations and improve steerability. But in this paper, we shall present the usage of the short gauge PDC bits when drilling with this type of RSS in a pay zone, which is characterized by hard streaks. More tight shaled-out interlayers were encountered in pay zone when developing a peripherical part of Verkhnechonskoye field. On the boundary of the rocks of different hardness a number of formation "pushes" (short intervals with a sharp change of the inclination) increased significantly. A continuous operation in the formation "push" intervals resulted in downhole equipment damages. When conducting kick-off operations in an open hole in multilateral wells with the use of "point-the-bit" RSS and the long gauge bits a quantity of failures reached 60 %. For that reason, it was necessary to kick off using a BHA with a downhole motor; but in this case additional runs are required. A hypothesis was made that the usage of short gauge PDC bits will help to promptly correct the wellbore trajectory when formation "push" occurs, as well as allow for drilling a few laterals over one run. Deviation from the standard design made it possible to reduce a number of runs when drilling multilateral wells, increase an average rate of penetration and significantly reduce frequency of Dogleg Severity exceedance events when passing through hard streaks.
- Asia > Russia > Ural Federal District > Yamalo-Nenets Autonomous Okrug > Purovsky District > West Siberian Basin > Central Basin > Tazovskoye Field (0.99)
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > Kataganskiy District > East Siberian Basin > Nepa-Botuoba Basin > Verhnechonskoye Field (0.99)
- Asia > Russia > Far Eastern Federal District > Sakha Republic (Yakutia) > East Siberian Basin > Nepa-Botuoba Basin > Chayandinskoye Field (0.98)
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > East Siberian Basin > Sayan-Angara-Lena Basin > Levoberezhnoye Field (0.97)
- Well Drilling > Drilling Operations > Directional drilling (1.00)
- Well Drilling > Drilling Equipment (1.00)
- Well Drilling > Drill Bits (1.00)
Optimization of the Verkhnechonskoye Field Development Process by Mapping Geomechanical Properties and Stresses
Kuleshov, Vasiliy (LLC Tyumen Petroleum Research Centre) | Pavlov, Valeriy (LLC Tyumen Petroleum Research Centre) | Pavlyukov, Nikolay (LLC Tyumen Petroleum Research Centre) | Korolev, Dmitriy (LLC Tyumen Petroleum Research Centre) | Samoilov, Mikhail (LLC Rosneft Peer Review and Technical Development Center) | Kozyrev, Aleksandr (JSC Verkhnechonskneftegaz)
Abstract On the basis of geological, hydrodynamic and 1D geomechanical models based on full-wave sonic log, results of AVO-inversion from 3D seismic survey, a 3D/4D sector geological and geomechanical model of the Verkhnechonskoye field has been constructed. A large number of vertical wells with the availability full-wave sonic log data and its uniform distribution over the field area allowed us to characterize the research interval in details in terms of elastic and strength characteristics. A wide range of input data was used to calibrate the model: MDT and XPT data, core laboratory studies, and hydraulic fracturing data. It was the first time for the VCH1 and VCH2 groups formations of the Verkhnechonskoye oil and gas condensate field geomechanical model was introduced into the permanent geological and technological model of the field. A comprehensive approach has been implemented to assess the geomechanical risks of hydraulic fracturing over the field area with calibration based on the actual results of hydraulic fracturing.
- Geology > Geological Subdiscipline > Geomechanics (1.00)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock (0.30)
- Geophysics > Borehole Geophysics (1.00)
- Geophysics > Seismic Surveying > Surface Seismic Acquisition (0.49)
- Geophysics > Seismic Surveying > Seismic Interpretation (0.34)
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > Kataganskiy District > East Siberian Basin > Nepa-Botuoba Basin > Verhnechonskoye Field (0.99)
- Oceania > Australia > Victoria > Bass Strait > Gippsland Basin (0.89)
- Asia > Thailand > Gulf of Thailand > Western Basin (0.89)
Challenges in the Development of Saline Terrigenous Reservoirs of Eastern Siberia Field
Levanov, Andrey (TNNC) | Ignatyev, Nikita (TNNC) | Ostyakov, Evgeniy (TNNC) | Vinogradov, Igor (TNNC) | Busuek, Elena (TNNC) | Cherepkova, Anna (TNNC) | Yaschenko, Sergey (TNNC) | Schetinina, Natalya (TNNC) | Semenov, Aleksey (VCNG) | Nesterov, Pavel (VCNG) | Musin, Roman (VCNG) | Dolgov, Igor (VCNG) | Komarov, Andrey (VCNG) | Chirgun, Aleksandr (VCNG)
Abstract At present, Russia's oil production in a number of large Eastern Siberia fields (Verkhnechonskoye, Talakanskoye, Yaraktinskoye) has reached or approached its maximum designed levels, therefore, the fields have progressed to the second stage of development or to the beginning of the third stage experiencing production declines. Thus, these fields can be categorized as brownfields. At the Verkhnechonskoye oil and gas condensate field, for the first time in the history of domestic oil and gas production the geologists came across a highly mineralized productive cross-section with the pore space partially or completely filled with salt. This determined the distinctive development features of the main target - the Verkhnechonsky horizon (Vch) (99.8% of the field's production). A distinctive feature of this paper is the description of the approaches to the development of the Verkhnechonsky horizon associated scaling formation and control using a wide range of geological and geophysical tools. The value of the work lies in the summary of lessons learned when managing reserves production and well operation processes at a large Eastern Siberia field, the development of which is complicated by the presence of salts in the pore space, which was the starting point of accumulating the knowledge on salt reservoir development. The experience based on a range of approaches and technical solutions can be applied to similar Eastern Siberia reservoirs with similar geological and physical characteristics.
- Geology > Rock Type > Sedimentary Rock > Clastic Rock (0.69)
- Geology > Mineral > Halide > Halite (0.51)
- Geology > Rock Type > Sedimentary Rock > Carbonate Rock (0.46)
- Geophysics > Borehole Geophysics (1.00)
- Geophysics > Seismic Surveying (0.69)
- Reservoir Description and Dynamics > Reservoir Fluid Dynamics > Flow in porous media (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Exploration, development, structural geology (1.00)
- (4 more...)
A Case Study of the Verkhnechonskoye Field: Theory and Practice of Eastern Siberia Complex Reservoirs Development
Chirgun, A.. (Verkhnechonskneftegaz) | Levanov, A.. (Tyumen Petroleum Research Center) | Gordeev, Y.. (Rosneft Oil Company) | Lazeev, A.. (Rosneft Oil Company) | Timchuk, A.. (Western Siberia Scientific and Research Institute of Geology and Geophysics)
Abstract A number of large greenfields has lately been brought into development in Eastern Siberia, Russia, one of which being the Verkhnechonskoye oil and gas condensate field. There, for the first time in the history of domestic oil and gas production at regional scale, geologists faced a high-mineralized section, where the pore space of productive horizons is partially or fully filled with salt, which defines differential characteristics when developing new assets. This study highlights the field development in the context of uncertainties, and the risk control strategy. It describes solutions for well operation in low temperature formations and for maintaining the oil-rate plateau using new approaches to development of sections of low formation reservoir properties (FRP) and under-gas-cap zones with the contact reserves of oil.
- Europe (1.00)
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > Kataganskiy District (1.00)
- Geology > Mineral (1.00)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock (0.69)
- Geophysics > Seismic Surveying (1.00)
- Geophysics > Borehole Geophysics (1.00)
- Reservoir Description and Dynamics > Reservoir Fluid Dynamics > Flow in porous media (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Exploration, development, structural geology (1.00)
- (7 more...)
Evolution of Approaches to Oil Rims Development in Terrigenous Formations of Eastern Siberia
Levanov, A.. (Tyumen Petroleum Research Center) | Kobyashev, A.. (Tyumen Petroleum Research Center) | Chuprov, A.. (Tyumen Petroleum Research Center) | Yashchenko, S.. (Tyumen Petroleum Research Center) | Musin, R.. (OJSC Verkhnechonskneftegaz) | Chirgun, A.. (OJSC Verkhnechonskneftegaz) | Svyashchenko, A.. (LLC Taas-Yuriakh Neftegazodobycha) | Grinchenko, V.. (LLC Taas-Yuriakh Neftegazodobycha) | Ovchinnikov, A.. (LLC Irkutsk Oil Company) | Burdakov, D.. (LLC Irkutsk Oil Company) | Zimin, S.. (LLC Irkutsk Oil Company)
Abstract Evolution of approaches to the development of oil rims is presented, based on the results of full-scale development of large oil and gas fields of East Siberia (Verkhnechonskoye, Srednebotuobinskoye, and Yaraktinskoye) put into production, in which a significant share of oil reserves (29% to 69%) is concentrated in the areas having a gas cap on top (figure 1). Production from these fields is confined to clastic reservoirs which in a number of key parameters are geologically similar, and at the same time in other key parameters are substantially different. A distinctive feature of the publication is the description of the process of change of solutions for the development of oil rims, where simulation models were used as the main tool of investigation. All available technologies and the efficiency of their combined application were assessed for each reservoir, taking into account their unique geological structure (areal and crosssectional heterogeneity, reservoir permeability, presence of an aquifer). The value of this work lies in systematization of practical experience of designing the development of, and operating the oil rims of the three large oil and gas fields in East Siberia, which forms a knowledge base for the development of the second stage oil and gas fields of the region. The accumulated pool of technological solutions adopted for implementation covers a range of various geological conditions of the productive clastic reservoirs.
- Europe (0.94)
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > Kataganskiy District (0.93)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock (1.00)
- Geology > Mineral (0.94)
- Geology > Sedimentary Geology > Depositional Environment (0.93)
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > Irkutsk Basin > Yaraktinskoye Field > Mot Formation > Podparfinov Sandstone (0.97)
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > East Siberian Basin > Sayan-Angara-Lena Basin > Levoberezhnoye Field (0.97)
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > Kataganskiy District > East Siberian Basin > Nepa-Botuoba Basin > Verhnechonskoye Field (0.94)
- (3 more...)
Support of East Siberian Oilfield Developing Based on Reservoir Simulation
Levanov, A. N. (Tyumen Petroleum Research Center) | Smirnov, A. S. (Tyumen Petroleum Research Center) | Komkov, A. E. (Tyumen Petroleum Research Center) | Klinovaya, Y. S (Tyumen Petroleum Research Center) | Anuryev, D. A. (Tyumen Petroleum Research Center) | Musin, R. A. (Verkhnechonskneftegas) | Gorbatko, E. A. (Verkhnechonskneftegas)
Abstract Nowadays, geological and simulation models are an essential tool used for design and support of oil and gas field development. At the same time, creation and application of models is technically complex and requires nontrivial approaches and solutions. This paper describes the experience of application of modeling for support of drilling and development optimization of one of the largest fields in Eastern Siberia. A distinctive feature of the publication is a compilation of tools of geological and simulation modeling, including experience in dealing with applications for the period from the start of field development to the achievement of the maximum hydrocarbon production. Approaches to creation and rapid response updating of geological and simulation models of a complex productive formation are described. These models incorporate a large number of different geophysical data and are used for a rapid response to field development and production drilling support. The value of the work lies in the integration of a large set of geophysical and field data into a single geological and simulation model and its further effective use.
- Europe (1.00)
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > Kataganskiy District (0.47)
- Geology > Mineral (0.94)
- Geology > Rock Type > Sedimentary Rock (0.47)
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > Kataganskiy District > East Siberian Basin > Nepa-Botuoba Basin > Verhnechonskoye Field (0.99)
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > Irkutsk Basin > Yarakta Field (0.99)
- Asia > Russia > Siberian Federal District > Irkutsk Oblast > East Siberian Basin > Sayan-Angara-Lena Basin > Levoberezhnoye Field (0.97)
Abstract Verkhnechonskoye oil and gas field is characterized by complicated geological structure, which places restrictions on well profile, selection of BHA and the time required for hole conditioning prior to casing running and cementing. The objective of this paper was to run a number of experiments aimed at drilling process optimization and reduction of horizontal well construction time at Verkhnechonskoye field thanks to drilling 178-mm production casing section in one run. The testing consisted of two phases. In the first phase 178-mm section was drilled in two runs. At first, maximum rate of penetration was maintained before the first complicated interval – the Middle Motskaya sub-suite – was encountered. Then the assembly was pulled out of hole, and LWD tools were included in the BHA. Upon completion of drilling and during POOH standard procedures were followed, and production casing was immediately run in hole. Then the experiment was run to drill the production casing section in one run using BHA which initially included a set of logging tools. Both experiments were used to successfully test the downhole motor with a specially designed oil-resistant elastomer. During the first series of experiments the time of 178-mm section drilling reduced by 12 to 30 hours, depending on the depth of production casing running. Then, the interval was drilled in one run using LWD tools, and about two days were saved. Also, the mudstone interval remained exposed for a much shorter period (almost 2 days), which reduced the risk of caving. Using logging tools while drilling enabled the Customer’s geology department to receive the data in real time, which gave them a better understanding TVD depth of production casing running. The practice of drilling ahead with similar BHA including full LWD suite in other wells showed that significant depth and rigidity of the assembly made it impossible to use it, if the azimuth of the well changed by over 60°. At the casing setting depth exceeding 2700 m even without changes in azimuth, in lower intervals issues were encountered with transferring weight on bit while slide drilling, which resulted in significantly lower rate of penetration. Another result of the experiment refers to the downhole motor with the oil-resistant elastomer. It worked throughout its warranty operating life – 147 hours of circulation – which allows recommending the motor for using with oil-based mud systems. The experience obtained at Verkhnechonskoye field may be used at other fields with similar geology, primarily in Irkutsk region.