Anisotropic Rock Poroelasticity Evolution in Ultra-low Permeability Sandstones under Pore Pressure, Confining Pressure, and Temperature: Experiments with Biot's Coefficient

doi:10.1111/1755-6724.13886

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	Anisotropic Rock Poroelasticity Evolution in Ultra-low Permeability Sandstones under Pore Pressure, Confining Pressure, and Temperature: Experiments with Biot's Coefficient
	Du SH(杜书恒)
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2021-06-01
卷号	95 期号:3 页码:937-945
ISSN号	1000-9515
DOI	10.1111/1755-6724.13886
英文摘要	This study aimed to show anisotropic poroelasticity evolution in ultra-low permeability reservoirs under pore pressure, confining pressure, and temperature. Several groups of experiments examining Biot's coefficient under different conditions were carried out. Results showed that Biot's coefficient decreased with increased pore pressure, and the variation trend is linear, but the decreasing rate is variable between materials. Biot's coefficient increased with increased confining pressure; the variation trend is linear, but the increasing rate varies by material as well. Generally, Biot's coefficient remains stable with increased temperature. Lithology, clay mineral content, particle arrangement, and pore arrangement showed impacts on Biot's coefficient. For strong hydrophilic clay minerals, expansion in water could result in a strong surface adsorption reaction, which could result in an increased fluid bulk modulus and higher Biot's coefficient. For skeleton minerals with strong lipophilicity, such as quartz and feldspar, increased oil saturation will also result in an adsorption reaction, leading to increased fluid bulk modulus and a higher Biot's coefficient. The study's conclusions provide evidence of poroelasticity evolution of ultra-low permeability and help the enhancing oil recovery (EOR) process.
分类号	Q3
语种	英语
其他责任者	Du, Shuheng
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87083]
专题	力学研究所_非线性力学国家重点实验室
作者单位	Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Du SH. Anisotropic Rock Poroelasticity Evolution in Ultra-low Permeability Sandstones under Pore Pressure, Confining Pressure, and Temperature: Experiments with Biot's Coefficient[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2021,95(3):937-945.
APA	杜书恒.(2021).Anisotropic Rock Poroelasticity Evolution in Ultra-low Permeability Sandstones under Pore Pressure, Confining Pressure, and Temperature: Experiments with Biot's Coefficient.ACTA GEOLOGICA SINICA-ENGLISH EDITION,95(3),937-945.
MLA	杜书恒."Anisotropic Rock Poroelasticity Evolution in Ultra-low Permeability Sandstones under Pore Pressure, Confining Pressure, and Temperature: Experiments with Biot's Coefficient".ACTA GEOLOGICA SINICA-ENGLISH EDITION 95.3(2021):937-945.