Experimental study of gas permeability evolution in tight sandstone with damage and cracking along various stress loading paths

2021 ◽  
Author(s):  
Wenhua Zha ◽  
Hongyuan Zhou ◽  
Zaobao Liu ◽  
Jianfu Shao ◽  
Yulong Zhang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Gas Permeability ◽  
Permeability Evolution ◽  
Tight Sandstone ◽  
Loading Paths

Experimental study of the gas permeability and bulk modulus of tight sandstone and changes in its pore structure

2017 ◽  
Vol 91 ◽  
pp. 203-209 ◽  
Author(s):  
Yi Wang ◽  
Franck Agostini ◽  
Frédéric Skoczylas ◽  
Laurent Jeannin ◽  
Éric Portier
Keyword(s):  
Experimental Study ◽  
Bulk Modulus ◽  
Pore Structure ◽  
Gas Permeability ◽  
Tight Sandstone

scholarly journals Coupled Effects of Stress, Moisture Content and Gas Pressure on the Permeability Evolution of Coal Samples: A Case Study of the Coking Coal Resourced from Tunlan Coalmine

Water ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1653
Author(s):  
Guofu Li ◽  
Yi Wang ◽  
Junhui Wang ◽  
Hongwei Zhang ◽  
Wenbin Shen ◽  
...  
Keyword(s):  
Moisture Content ◽  
Coalbed Methane ◽  
Gas Permeability ◽  
Axial Stress ◽  
Gas Pressure ◽  
Pressure Curve ◽  
Permeability Evolution ◽  
Confining Stress ◽  
Qinshui Basin ◽  
Gas Seepage

Deep coalbed methane (CBM) is widely distributed in China and is mainly commercially exploited in the Qinshui basin. The in situ stress and moisture content are key factors affecting the permeability of CH4-containing coal samples. Therefore, considering the coupled effects of compressing and infiltrating on the gas permeability of coal could be more accurate to reveal the CH4 gas seepage characteristics in CBM reservoirs. In this study, coal samples sourced from Tunlan coalmine were employed to conduct the triaxial loading and gas seepage tests. Several findings were concluded: (1) In this triaxial test, the effect of confining stress on the permeability of gas-containing coal samples is greater than that of axial stress. (2) The permeability versus gas pressure curve of coal presents a ‘V’ shape evolution trend, in which the minimum gas permeability was obtained at a gas pressure of 1.1MPa. (3) The gas permeability of coal samples decreased exponentially with increasing moisture content. Specifically, as the moisture content increasing from 0.18% to 3.15%, the gas permeability decreased by about 70%. These results are expected to provide a foundation for the efficient exploitation of CBM in Qinshui basin.

scholarly journals Experimental study on influencing factors for forced imbibition in tight sandstone cores

2020 ◽  
Vol 37 (5) ◽  
pp. 497-506
Author(s):  
Yun JIANG ◽  
Guoqing XU ◽  
Yang SHI ◽  
Xinghang ZENG ◽  
Tianyi WANG
Keyword(s):  
Experimental Study ◽  
Influencing Factors ◽  
Tight Sandstone

Gas permeability evolution characteristics of limestone under different stress conditions

2022 ◽  
Vol 29 (1) ◽  
pp. 12
Author(s):  
Yin Zeng ◽  
Lu Wang ◽  
Chaofu Deng ◽  
Qiangxing Zhang ◽  
Zhide Wu ◽  
...  
Keyword(s):  
Gas Permeability ◽  
Stress Conditions ◽  
Permeability Evolution ◽  
Evolution Characteristics

Experimental study of anisotropic gas permeability and its relationship with fracture structure of Longmaxi Shales, Sichuan Basin, China

Fuel ◽  
2016 ◽  
Vol 180 ◽  
pp. 106-115 ◽  
Author(s):  
Yong Ma ◽  
Zhejun Pan ◽  
Ningning Zhong ◽  
Luke D. Connell ◽  
David I. Down ◽  
...  
Keyword(s):  
Experimental Study ◽  
Sichuan Basin ◽  
Gas Permeability ◽  
Fracture Structure

Gas permeability evolution mechanism during creep of a low permeable claystone

2016 ◽  
Vol 129 ◽  
pp. 47-53 ◽  
Author(s):  
Z.B. Liu ◽  
J.F. Shao ◽  
T.G. Liu ◽  
S.Y. Xie ◽  
N. Conil
Keyword(s):  
Gas Permeability ◽  
Permeability Evolution ◽  
Evolution Mechanism

scholarly journals Study on the impact of confining pressure on gas permeability of tight sandstone cores

2021 ◽  
Vol 2076 (1) ◽  
pp. 012006
Author(s):  
Jianxiang Tong ◽  
Hengyang Wang ◽  
Yuyi Wang ◽  
Ya Zhang ◽  
Xiaohe Huang
Keyword(s):  
Power Function ◽  
Rate Coefficient ◽  
Gas Permeability ◽  
Confining Pressure ◽  
Experimental Sample ◽  
Tight Sandstone ◽  
Change Rate ◽  
Shengli Oilfield ◽  
Confining Pressures ◽  
The Impact

Abstract Taking the tight sandstone core of Shengli Oilfield as the experimental sample, this paper studies the permeability variation of the tight sandstone under different confining pressures. The experimental results show that when the pore pressure is constant, the measured gas permeability of core decreases with the increase of confining pressure. Power function is more reasonable to describe the influence of confining pressure on permeability of tight sandstone between power function and exponential function. Analyze the impact of confining pressure on gas permeability of tight sandstone cores by using permeability change rate coefficient D and coefficient S.

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