Numerical Simulation for Data Analyses of First Gas Hydrate Trial Production Test in Shenhu Area

被引：0

作者：

Cui W. ^{[1
]}

Xiao J. ^{[1
]}

机构：

[1] Academy of Advanced Interdisciplinary Studies, Qilu University of Technology (Shandong Academy of Sciences), Ji'nan

来源：

Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2022年 / 47卷 / 05期

关键词：

Deviation; Natural gas hydrate; Numerical simulation; Permeability; Petroleum geology; Production well pressure; Shenhu area;

D O I：

10.3799/dqkx.2022.089

中图分类号：

学科分类号：

摘要：

After the first successful trial production in the Shenhu area of the South China Sea in 2017, many scholars have used numerical methods to simulate this process, but the simulation results have always been deviated from the data of actual trial production. In order to explore the reasons for the deviation, a mathematical model is established for depressurization discovery in a two-dimensional cylindrical coordinate system, and a corresponding program is developed in this study, to simulate not only the non-uniform distribution of reservoir parameters such as permeability and so on, but also the impact of dynamic parameter such as the wellbore pressure on the production process. Making full use of the flexibility of the autonomous program, the reasons for the deviation are obtained through numerical experiment analysis: (1) The muddy silt-type reservoir has water sensitivity, and the fresh water produced by the decomposition of hydrate causes clay swelling, which makes the permeability decrease; (2) The production well pressure must be taken as the dynamic input parameter. Based on this, the permeability model was revised, and the time-varying pressure in production well was dynamically input. The simulated gas production obtained is very close to the trial production data, making the numerical simulation of depressurization closer to the actual situation. © 2022, Editorial Department of Earth Science. All right reserved.

引用

页码：1890 / 1900

页数：10

共 27 条

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