Experimental study of permeability and its anisotropy for shale fracture supported with proppant

doi:10.1016/j.jngse.2017.04.020

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Experimental study of permeability and its anisotropy for shale fracture supported with proppant
	Haque, Asadul 6; Tan, Yuling 2,3,4; Pan, Zhejun 4; Liu, Jishan 2,5; Wu, Yanting 1,4; Connell, Luke D.4
刊名	JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
	2017
卷号	44 页码:250-264
关键词	Shale gas Anisotropic permeability Fracture Proppant Compressibility Unconventional gas
ISSN号	1875-5100
DOI	10.1016/j.jngse.2017.04.020
英文摘要	Shale gas is an important unconventional natural gas resource, but shale has extremely low permeability. Production of shale gas can be improved by using proppants for hydraulic fracturing and maintaining fracture conductivity, and a better understanding of the permeability and its anisotropy of proppant-supported fractures would be useful in optimising gas production. This paper described experiments on shale permeability and its anisotropy with respect to gas pressure, effective stress and gas type for a natural fracture supported with two sizes of proppant. A cubic sample from the Silurian Longmaxi formation in the Sichuan Basin, China, was used in the study; the testing direction of the sample was altered, and both helium (non-sorbing) and methane (sorbing) were tested. Microscopic X-ray computerised tomography (mu-CT) scanning was used to reveal the proppant distribution and fracture shape. Finally, an analytical model was applied to describe the permeability with respect to pore pressure and effective stress and the results were used to determine the relationships between initial fracture compressibility, Klinkenberg coefficient and absolute permeability. The permeabilities of propped fractures were found to be a few hundred or even a few thousand times higher than those of the natural fracture under the same experimental conditions, with both the proppant size and the amount of proppants added affecting this increase. The permeability was anisotropic in two horizontal directions. The direction and ratio of permeability anisotropy of the proppant-supported fracture differed from those of the natural fracture, depending on the amount of proppants added and their distribution in the fracture. The model indicated that permeability decreased with effective stress at a given pore pressure, and with pore pressure at a given effective stress. It also suggested that adding proppants will significantly change the absolute permeability but not the initial fracture compressibility. Although the permeability had strong anisotropy, the initial fracture compressibility relationships with absolute permeability were independent of flow direction and followed the same trend. The relationship between the Klinkenberg constant and absolute permeability was found to be well described by a cubic law function. (C) 2017 Elsevier B.V. All rights reserved.
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000404304800020
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4106]
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.China Univ Min & Technol Beijing, Coll Geosci & Surveying Engn ; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 3.Univ Chinese Acad Sci ; 4.CSIRO Energy; 5.Univ Western Australia, Sch Mech & Chem Engn; 6.Monash Univ, Dept Civil Engn
推荐引用方式 GB/T 7714	Haque, Asadul,Tan, Yuling,Pan, Zhejun,et al. Experimental study of permeability and its anisotropy for shale fracture supported with proppant[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2017,44:250-264.
APA	Haque, Asadul,Tan, Yuling,Pan, Zhejun,Liu, Jishan,Wu, Yanting,&Connell, Luke D..(2017).Experimental study of permeability and its anisotropy for shale fracture supported with proppant.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,44,250-264.
MLA	Haque, Asadul,et al."Experimental study of permeability and its anisotropy for shale fracture supported with proppant".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 44(2017):250-264.