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- W2904509074 abstract "Several laboratory experiments are carried out to investigate the effects of microfractures on stress-dependent permeability. An analytical model depending on pore elasticity theory is proposed to study the related influencing factors. The results show that each curve of stress-dependent permeability is divided into two regions: Microfractures closure region and pore compress region. The permeability decreases significantly in microfractures closure region, but it does not change too much in pore compress region. The permeability decreases by about 85~90% in total. It suggests that microfractures deformation cannot recover easily. The analytical solution results present that the volume fraction of microfractures has an important effect on stress-dependent permeability. The stress sensitive coefficient significantly decreases with the ratio of pores volume to microfractures volume (PV/FV). When the value of PV/FV is larger than 2, the stress sensitive coefficient does not change obviously with PV/FV. The high microfractures compressibility is the primary reason why the permeability in tight sandstone presents more sensitivity to effective stress. Copyright © 2018 ARMA, American Rock Mechanics Association." @default.
- W2904509074 created "2018-12-22" @default.
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- W2904509074 date "2018-06-17" @default.
- W2904509074 modified "2023-09-28" @default.
- W2904509074 title "Effects of microfractures properties on stress-dependent permeability in tight oil reservoirs" @default.
- W2904509074 hasPublicationYear "2018" @default.
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