黔西地区煤层埋深与地应力对其渗透性控制机制

徐宏杰; 桑树勋; 易同生; 赵霞; 刘会虎; 李林

doi:10.3799/dqkx.2014.143

Volume 39 Issue 11

Nov. 2014

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Article Navigation > Earth Science > 2014 > 39(11): 1507-1516

Xu Hongjie, Sang Shuxun, Yi Tongsheng, Zhao Xia, Liu Huihu, Li Lin, 2014. Control Mechanism of Buried Depth and In-Situ Stress for Coal Reservoir Permeability in Western Guizhou. Earth Science, 39(11): 1507-1516. doi: 10.3799/dqkx.2014.143

Citation:

Xu Hongjie, Sang Shuxun, Yi Tongsheng, Zhao Xia, Liu Huihu, Li Lin, 2014. Control Mechanism of Buried Depth and In-Situ Stress for Coal Reservoir Permeability in Western Guizhou. Earth Science, 39(11): 1507-1516. doi: 10.3799/dqkx.2014.143

Citation:

Xu Hongjie, Sang Shuxun, Yi Tongsheng, Zhao Xia, Liu Huihu, Li Lin, 2014. Control Mechanism of Buried Depth and In-Situ Stress for Coal Reservoir Permeability in Western Guizhou. Earth Science, 39(11): 1507-1516. doi: 10.3799/dqkx.2014.143

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Control Mechanism of Buried Depth and In-Situ Stress for Coal Reservoir Permeability in Western Guizhou

doi: 10.3799/dqkx.2014.143

Xu Hongjie^{1, 2
,},
Sang Shuxun^{3
,
,},
Yi Tongsheng²,
Zhao Xia²,
Liu Huihu¹,
Li Lin⁴

1.
School of Earth Sciences and Environmental Studies, Anhui University of Science & Technology, Huainan 232001, China
2.
Research Center of Guizhou Coalbed Methane and Shale Gas Engineering, Guiyang 550008, China
3.
School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221008, China
4.
Xi'an Branch, China Coal Research Institute, Xi'an 710054, China

Received Date: 2013-12-18
Publish Date: 2014-11-01

Abstract

Abstract

Based on geological analysis of data of 16 testing wells in the Liupanshui and Zhina coalfields, the spatial distribution of coal reservoir permeability and characteristics of in-situ stress in the western Guizhou are discussed, and the control mechanism of buried depth and in-situ stress for coal reservoir permeability is obtained in this study. It is shown that the coal reservoirs have the characteristic of ultra-low and low permeability (< 0.1×10^-9m²), and the permeability of coal reservoir with 0.1×10^-9-1.0×10^-9m² has considerably large proportion. The type of in-situ stress field is gradually undergoing a possible change from dynamic field in shallow layer to hydrostatic pressure field in deep layer. It has a negative power exponent relationship of coal reservoir permeability and buried depth, but the change of permeability is in accordance with in-situ stress field changed. The permeability of coal reservoir varies in different testing wells, decreasing with the increased in-situ stress and depth, and its spatial distribution has a law of "low-high-low" from SW to NE for the intensity of the stress controlled. The role of coal depth to permeability is supposed to be the in-situ stress in action essentially. The main control mechanism of coal permeability difference is that the pore and fracture tend to compress or close caused by the deformation and fragmentation of coal reservoirs under the influence of high in-situ stress in regional tectonic location of study area.
- western Guizhou,
- coal reservoir,
- permeability,
- buried depth,
- in-situ stress,
- control mechanism,
- energy geology

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References(57)

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Control Mechanism of Buried Depth and In-Situ Stress for Coal Reservoir Permeability in Western Guizhou

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