M.N. Ufimtseva, A.V. Bochkarev, O.A. Bondarenko, D.V. Grandov
DOI: https://doi.org/10.25689/NP.2023.4.194-207
Abstract
From the experience of oil fields development, it is known that besides natural gas cap in formations, during field development there can be secondary processes of dissolved gas break out with technogenic formation of free gas containment areas. This, among other things, causes gas to breakthrough into bottomhole and drastically increase field gas-oil ratio (as opposed to approved gas content). Consequently, estimation of dissolved gas recovery based on approved gas content cannot be considered correct.
Initial reservoir pressure virtually corresponds to bubble-point pressure in gas and oil reservoirs. Current reservoir pressure over production history often lower than bubble-point pressure even with on-time implementation of reservoir pressure maintenance system so gas breaks out directly within the reservoir which results in increase of field oil-gas ration relative to approved gas content. In such case it is not sufficient to use gas content determined from deep oil samples under laboratory conditions to calculate historical dissolved gas production data. It is also necessary to take into account field oil-gas ration measurements taken directly at the well using mobile multiphase metering unit (MPMU) as well as gas measurement at gathering points (BPS, gathering station). Utilization of all available field information will allow the most reliable estimation of dissolved gas recovery [1, 2].
Therefore, there is a practical need for an analytical tool that can quickly solve the problem of separating historical and current production data.
References
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3. Ufimtseva M.N. Four stages of production redistribution at the multilayer field X under conditions of multiphase filtration. Ekspozitsiya Neft Gaz [Exposition Oil Gas]. 2022, No. 8, pp. 60–64. (in Russian)
4. Vremennyi metodicheskii podkhod k obosnovaniyu izvlekaemykh zapasov rastvorennogo gaza dlya ekspluatatsionnykh obektov mestorozhdenii UVS gruppy kompanii PAO “Gazprom neft” [Temporary methodological approach to substantiation of recoverable dissolved gas reserves for production facilities at hydrocarbons fields of “Gazprom neft”]. Records of Expert and Engineering Council hearings dt. 18.09.2018, No. 11. (in Russian)
Authors
M.N. Ufimtseva, Chief Specialist, Tyumen Petroleum Research Center LLC
79/1, Osipenko st., Tyumen, 625002, Russian Federation
E-mail: mnufimtseva@tnnc.rosneft.ru
A.V. Bochkarev, Head of Department, Department of Field Development Support, Tyumen Petroleum Research Center LLC
79/1, Osipenko st., Tyumen, 625002, Russian Federation
E-mail: avbochkarev3@tnnc.rosneft.ru
O.A. Bondarenko, Project Chief Engineer, Tyumen Petroleum Research Center LLC
79/1, Osipenko st., Tyumen, 625002, Russian Federation
E-mail: oabondarenko2@tnnc.rosneft.ru
D.V. Grandov, Chief Manager, Project Management Office, Tyumen Petroleum Research Center LLC
79/1, Osipenko st., Tyumen, 625002, Russian Federation
E-mail: dvgrandov@tnnc.rosneft.ru
For citation:
M.N. Ufimtseva, A.V. Bochkarev, O.A. Bondarenko, D.V. Grandov Analiticheskaya metodika razdeleniya poputnogo i rastvorennogo gaza na krupnom mestorozhdenii Zapadnoy Sibiri [Analytical procedure of associated and dissolved gas separation at large field of Western Siberia]. Neftyanaya Provintsiya, No. 4(36), 2023. pp. 194-207. DOI https://doi.org/10.25689/NP.2023.4.194-207. EDN QIGQKL (in Russian)