V.A. Vanin, T.M. Malysheva
DOI: https://doi.org/10.25689/NP.2023.4.262-274
Abstract
The paper describes the correlation problem of the Daginskaya (Dagi) Series of Lower-Middle Miocene productive formations on a case study of a large offshore gas-condensate field on Sakhalin, which has not yet entered the operational phase. The field has included to the list of the main deposits forming the mineral resource base of the Sakhalin region [1]. The reservoir structure is significantly complicated by high-amplitude faults. When building the author's model of the field, the specialists of the corporate scientific center managed to justify a more correct and logical correlation of productive deposits in comparison with the previous one. The maximum adjustment of the formation markers that was required reached 70 m. within the reservoir height of about 300 m. This led to the reinterpretation of 3D seismic data over the entire area of the field (>100 km.2). The main reason is the large–scale erosion of the Upper-Dagi sediments (more than 100 m.), but it was a local event, related to the southern part of the “B” field. As a result, the sand bodies formed in the conditions of the Amur paleodelta in the new model gained greater lateral consistency, the discontinuity of reservoirs was significantly reduced, a 14 % increase in reserves was obtained, and the characteristics of forecast production profiles were improved.
The paper shows paleotectonic and geodynamic processes that led to erosion and redeposition of sediments. The prospects of additional lateral and vertical exploration of the field by are described.
References
2. V.V. Kharakhinov, 2010, Oil and gas geology of the Sakhalin Region, Moscow, Scientific World. (in Russian)
3. How rifts are formed in brief, 2023, Educational portal www.obrazovanie-gid.ru, Moscow. (in Russian)
4. V.A. Zhemchugova, 2012, Practical application of reservoir sedimentology in modeling of hydrocarbon systems, Gubkin Russian State University of Oil and Gas. (in Russian)
5. V.S. Shein, V.A. Ignatova, 2007, Geodynamics and prospects of oil and gas content of sedimentary basins of the Far East, VNIGNI, Moscow. (in Russian)
Authors
V.A. Vanin, Chief Manager, Administration for Geology and Development of New and Foreign Production Assets, Tyumen Petroleum Research Center LLC
79/1 Osipenko Str., 625002 Tyumen, Russia
E-mail: VAVanin@tnnc.rosneft.ru
T.M. Malysheva, Chief Specialist, Administration for Geology and Development of New and Foreign Production Assets, Tyumen Petroleum Research Center LLC
79/1, Osipenko st., Tyumen, 625002, Russian Federation
E-mail: TMMalysheva@tnnc.rosneft.ru
For citation:
V.A. Vanin, T.M. Malysheva Utochnonnaya model' gazokondensatnogo mestorozhdeniya na shel'fe Sakhalina [Updated model of an offshore gas-condensate field on Sakhalin]. Neftyanaya Provintsiya, No. 4(36), 2023. pp. 262-274. DOI https://doi.org/10.25689/NP.2023.4.262-274. EDN VJFSUK (in Russian)