TY - GEN

T1 - Efficiency of using a proxy model for modeling of reservoir pressure

AU - Yudin, Evgeniy Viktorovich

AU - Markov, Nikolay Sergeevich

AU - Kotezhekov, Viktor Sergeevich

AU - Kraeva, Svetlana Olegovna

AU - Makhnov, Andrei Vasilyevich

AU - Trubnikov, Nikita Pavlovich

AU - Gorbushin, Leonid Arkadevich

N1 - Publisher Copyright: Copyright 2021, Society of Petroleum Engineers.

PY - 2021

Y1 - 2021

N2 - The presented paper is devoted to the development and testing of a computational tool for assessment of the reservoir pressure and prompt generation of the pressure maps of collectors. The tool is based on a proxy model that allows to solve the two-dimensional diffusion equation for unsteady liquid filtration using the boundary element method. To expand the applicability of the proxy model, an algorithm for automated parameter adaptation was developed. This algorithm allows to exclude knowingly unreliable data or low-quality data from modeling. This is achieved due to analyzing the correlation between the injection, production and bottom-hole pressures for the entire well stock over the history of the reservoir development. In addition, this paper describes an approach to modeling two-phase oil and gas filtration based on the use of pseudofunctions. This approach considers the influence of gas on the oil filtration process. The use of pseudofunctions allows us to linearize the diffusion equation for two-phase filtration and to solve it using the boundary element method in the same manner as for the case of oil filtration without gas. To demonstrate the results of the proxy model validation, examples of its use for generating the pore pressure maps for two real collectors are given. The average values of the reservoir pressure at the wells calculated using the proxy model are compared with the results of the corresponding well tests and with the traditional isobar maps. The analysis showed that the average deviation of the proxy model from the real reservoir pressures is less than 10%.

AB - The presented paper is devoted to the development and testing of a computational tool for assessment of the reservoir pressure and prompt generation of the pressure maps of collectors. The tool is based on a proxy model that allows to solve the two-dimensional diffusion equation for unsteady liquid filtration using the boundary element method. To expand the applicability of the proxy model, an algorithm for automated parameter adaptation was developed. This algorithm allows to exclude knowingly unreliable data or low-quality data from modeling. This is achieved due to analyzing the correlation between the injection, production and bottom-hole pressures for the entire well stock over the history of the reservoir development. In addition, this paper describes an approach to modeling two-phase oil and gas filtration based on the use of pseudofunctions. This approach considers the influence of gas on the oil filtration process. The use of pseudofunctions allows us to linearize the diffusion equation for two-phase filtration and to solve it using the boundary element method in the same manner as for the case of oil filtration without gas. To demonstrate the results of the proxy model validation, examples of its use for generating the pore pressure maps for two real collectors are given. The average values of the reservoir pressure at the wells calculated using the proxy model are compared with the results of the corresponding well tests and with the traditional isobar maps. The analysis showed that the average deviation of the proxy model from the real reservoir pressures is less than 10%.

UR - http://www.scopus.com/inward/record.url?scp=85118428640&partnerID=8YFLogxK

U2 - 10.2118/SPE-206553-MS

DO - 10.2118/SPE-206553-MS

M3 - Conference contribution

AN - SCOPUS:85118428640

T3 - Society of Petroleum Engineers - SPE Russian Petroleum Technology Conference 2021, RPTC 2021

BT - Society of Petroleum Engineers - SPE Russian Petroleum Technology Conference 2021, RPTC 2021

PB - Society of Petroleum Engineers

T2 - SPE Russian Petroleum Technology Conference 2021, RPTC 2021

Y2 - 12 October 2021 through 15 October 2021

ER -