Effects of gas sorption-induced swelling/shrinkage on the cleat compressibility of coal under different bedding directions

doi:10.1038/s41598-017-14678-1

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	Effects of gas sorption-induced swelling/shrinkage on the cleat compressibility of coal under different bedding directions
	Wang, Geoff 3; Fang, Zhiming 1; Peng, Shoujian 2,3; Shen, Jian 4; Xu, Jiang 2
刊名	SCIENTIFIC REPORTS
	2017
卷号	7 页码:-
ISSN号	2045-2322
DOI	10.1038/s41598-017-14678-1
英文摘要	The cleat compressibility of coal is a key parameter that is extensively used in modeling the coal reservoir permeability for Coal Bed Methane (CBM) recovery. Cleat compressibility is often determined from the permeability measurement made at different confining pressures but with a constant pore pressure. Hence, this parameter ignores the sorption strain effects on the cleat compressibility. By using the transient pulse decay (TPD) technique, this study presents the results from a laboratory characterization program using coal core drilled from different bedding directions to estimate gas permeability and coal cleat compressibility under different pore pressures while maintaining effective stress constant. Cleat compressibility was determined from permeability and sorption strain measurements that are made at different pore pressures under an effective stress constant. Results show that the cleat compressibility of coal increases slightly with the increase of pore pressure. Moreover, the cleat compressibility of Sample P (representing the face cleats in coal) is larger than that of Sample C (representing the butt cleats in coal). This result suggests that cleat compressibility should not be regarded as constant in the modeling of the CBM recovery. Furthermore, the compressibility of face cleats is considerably sensitive to the sorption-induced swelling/shrinkage and offers significant effects on the coal permeability.
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000414131700030
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4156]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	1.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil, Mech ; 2.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control ; 3.Univ Queensland, Sch Chem Engn; 4.China Univ Min & Technol, Key Lab CBM Resources & Dynam Accumulat Proc, Minist Educ China
推荐引用方式 GB/T 7714	Wang, Geoff,Fang, Zhiming,Peng, Shoujian,et al. Effects of gas sorption-induced swelling/shrinkage on the cleat compressibility of coal under different bedding directions[J]. SCIENTIFIC REPORTS,2017,7:-.
APA	Wang, Geoff,Fang, Zhiming,Peng, Shoujian,Shen, Jian,&Xu, Jiang.(2017).Effects of gas sorption-induced swelling/shrinkage on the cleat compressibility of coal under different bedding directions.SCIENTIFIC REPORTS,7,-.
MLA	Wang, Geoff,et al."Effects of gas sorption-induced swelling/shrinkage on the cleat compressibility of coal under different bedding directions".SCIENTIFIC REPORTS 7(2017):-.