适用于中深层-深层页岩气的高压吸附模型

任文希; 周玉; 郭建春; 王天宇

doi:10.3799/dqkx.2022.014

Volume 47 Issue 5

May 2022

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Article Navigation > Earth Science > 2022 > 47(5): 1865-1875

Ren Wenxi, Zhou Yu, Guo Jianchun, Wang Tianyu, 2022. High-Pressure Adsorption Model for Middle-Deep and Deep Shale Gas. Earth Science, 47(5): 1865-1875. doi: 10.3799/dqkx.2022.014

Citation:

Ren Wenxi, Zhou Yu, Guo Jianchun, Wang Tianyu, 2022. High-Pressure Adsorption Model for Middle-Deep and Deep Shale Gas. Earth Science, 47(5): 1865-1875. doi: 10.3799/dqkx.2022.014

Ren Wenxi, Zhou Yu, Guo Jianchun, Wang Tianyu, 2022. High-Pressure Adsorption Model for Middle-Deep and Deep Shale Gas. Earth Science, 47(5): 1865-1875. doi: 10.3799/dqkx.2022.014

Citation:

Ren Wenxi, Zhou Yu, Guo Jianchun, Wang Tianyu, 2022. High-Pressure Adsorption Model for Middle-Deep and Deep Shale Gas. Earth Science, 47(5): 1865-1875. doi: 10.3799/dqkx.2022.014

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High-Pressure Adsorption Model for Middle-Deep and Deep Shale Gas

doi: 10.3799/dqkx.2022.014

1.
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
2.
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China

Received Date: 2021-10-07
Publish Date: 2022-05-25

Abstract

Abstract

The development depth is mostly greater than 2 000 m in major shale gas producing areas of China. As burial depth increases, reservoir pressure increases. The experimental and theoretical study of shale gas adsorption under low pressure is not suitable for the development of medium-deep and deep shale gas reservoirs. Thus, it modified the Uniform Langmuir model, and developed a high-pressure methane adsorption model, i.e., the modified Uniform Langmuir(Unilan)model. Then, we used the published experimental data under high pressure to validate the modified Unilan model. Moreover, we compared the modified Unilan model with other high-pressure adsorption models. It is found that the modified Unilan model with less fitting parameters is characterized by high precision, compared with other high pressure adsorption models. Finally, we investigated the fitted model parameters based on the mineral composition of the used shale samples. It is found that the adsorption capacity of shale is mainly controlled by organic matter and clay. Moreover, the volume of the adsorbed phase at maximum adsorption capacity is greater than micropore volume, but is less than total pore volume. Adsorption entropy change is mainly controlled by the interaction strength between adsorbed methane molecules and shale.
- shale gas,
- high pressure adsorption,
- adsorption model,
- adsorption energy,
- adsorption entropy change,
- petroleum geology

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References(52)

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High-Pressure Adsorption Model for Middle-Deep and Deep Shale Gas

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