IMECH-IR  > 流固耦合系统力学重点实验室
Effects of microfractures properties on stress-dependent permeability in tight oil reservoirs
Yang L(杨柳)1; Lu XB(鲁晓兵)1; Shi X2; Zhang KH2; Gao J3; Chen X3; Zhang ZB3
2018
会议名称52nd U.S. Rock Mechanics/Geomechanics Symposium
会议日期June 17, 2018 - June 20, 2018
会议地点Seattle, WA, United states
会议录名称52nd U.S. Rock Mechanics/Geomechanics Symposium
摘要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.
关键词Petroleum reservoirs Road construction Rock mechanics Effective stress Elasticity theory Laboratory experiments Microfractures Oil reservoirs Stress sensitive coefficient Stress dependent Tight sandstones
收录类别EI
语种英语
文献类型会议论文
条目标识符http://dspace.imech.ac.cn/handle/311007/78005
专题流固耦合系统力学重点实验室
作者单位1.Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China;
2.China University of Petroleum (East China), Qingdao, China;
3.Research Institute of Petroleum Exploration and Development, Beijing, China
推荐引用方式
GB/T 7714
Yang L,Lu XB,Shi X,et al. Effects of microfractures properties on stress-dependent permeability in tight oil reservoirs[C],2018.
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