黔西比德-三塘盆地煤储层异常高压形成机制

吴财芳; 王聪; 姜玮

doi:10.3799/dqkx.2014.007

Volume 39 Issue 1

Jan. 2014

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Wu Caifang, Wang Cong, Jiang Wei, 2014. Abnormal High-Pressure Formation Mechanism in Coal Reservoir of Bide-Santang Basin, Western Guizhou Province. Earth Science, 39(1): 73-78. doi: 10.3799/dqkx.2014.007

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Wu Caifang, Wang Cong, Jiang Wei, 2014. Abnormal High-Pressure Formation Mechanism in Coal Reservoir of Bide-Santang Basin, Western Guizhou Province. Earth Science, 39(1): 73-78. doi: 10.3799/dqkx.2014.007

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Abnormal High-Pressure Formation Mechanism in Coal Reservoir of Bide-Santang Basin, Western Guizhou Province

doi: 10.3799/dqkx.2014.007

Wu Caifang^{1, 2
,},
Wang Cong^{1, 2},
Jiang Wei^{1, 2}

1.
The School of Resource and Earth Science, China University of Mining & Technology, Xuzhou 221116, China
2.
Key Laboratory of Coalbed Methane Resources & Reservoir Formation History of Ministry of Education, Xuzhou 221116, China

Received Date: 2013-02-26
Publish Date: 2014-01-01

Abstract

Abstract

The coal reservoir has high reservoir pressure, great pressure gradient and developmental abnormal high pressure in Bide-Santang basin. This paper mainly analyzes the influence factors of abnormal high pressure and illustrates the formation mechanism by studying the distribution characteristics of coal reservoir pressure. Results show that the tectonism is the uppermost factor to the abnormal high pressure formation, hydrocarbon generation of coal reservoir and roof mudstone sealing take second place. There are few faults, good sealed conditions and rich reservoir fluid in the interior of basin, which led to the increase of coal reservoir pressure and abnormal high pressure. The coal reservoir has strong hydrocarbon generation ability, high gas content and low permeability, and generated hydrocarbon gas makes the internal fluid pore volume of coal reservoir expanded and produce high pressure. Moreover, the extra-thick roof mudstone which easily causes undercompacted compaction in the deposition process has good sealing, and further promotes the development of the abnormal pressure.
- Bide-Santang basin,
- abnormal high pressure,
- coal reservoir,
- reservoir pressure,
- tectonics,
- hydrocarbons

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References(34)

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Abnormal High-Pressure Formation Mechanism in Coal Reservoir of Bide-Santang Basin, Western Guizhou Province

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