Method for determining limit well spacing of chemical flooding after reservoir steam soak in heavy oil reservoir

被引：0

作者：

Cui C. ^{[1
]}

Zheng W. ^{[2
]}

Zhu Y. ^{[3
]}

Yuan F. ^{[3
]}

Xia X. ^{[4
]}

Wu Z. ^{[1
]}

Teng S. ^{[1
]}

机构：

[1] School of Petroleum Engineering in China University of Petroleum (East China), Qingdao

[2] Bohai Petroleum Institute, Tianjin Branch, CNOOC China Limted, Tianjin

[3] Exploration and Development Research Institute, SINOPEC Shengli Oilfield Branch, Dongying

[4] SINOPEC Research Institute of Safety Engineering, Qingdao

来源：

Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2022年 / 46卷 / 01期

关键词：

Heavy oil reservoir; Limit well spacing; Numerical simulation; Viscosity reduction chemical drive;

D O I：

10.3969/j.issn.1673-5005.2022.01.011

中图分类号：

学科分类号：

摘要：

Considering the time-varying characteristics of oil phase and water phase viscosity, a reservoir numerical simulation system for viscosity reduction chemical flooding after steam soak was established. On the basis of the distribution of reservoir parameters after steam soak and the changes of parameters during viscosity reduction chemical drive process, the driving pressure gradient and the starting pressure gradient between injection and production wells were obtained from the simulation calculation. The calculation method of the chemical well driving limit well spacing after the steam stimulation of the heavy oil reservoir was developed, and the technical limit well spacing practical chart was produced. The well pattern was deployed in the Ng31-42 layer of Shengli Oilfield according to the technical limit well spacing chart. It is shown when the mass fraction of viscosity reducer is constant, the limit well spacing increases with the initial crude oil mobility increasing. When the initial crude oil mobility is constant, the limit well spacing increases with the mass fraction of viscosity reducer increasing. The formation pressure of the Ng31-42 layer of Shengli Oilfield is restored to 96.80% of the original formation pressure, and the recovery is increased by 14.92% in 5 years. © 2022, Editorial Office of Journal of China University of Petroleum(Edition of Natural Science). All right reserved.

引用

页码：97 / 103

页数：6

共 22 条

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