Effects of slick water fracturing fluid on pore structure and adsorption characteristics of shale reservoir rocks

doi:10.1016/j.jngse.2017.12.030

	Effects of slick water fracturing fluid on pore structure and adsorption characteristics of shale reservoir rocks
	Sun, Zepeng 1,3; Zhang, Hailong 4; Wei, Zhifu 1; Wang, Yongli 1,2; Wu, Baoxiang 1; Zhuo, Shengguang 5; Zhao, Zhe 5; Li, Jing 1; Hao, Lewei 1; Yang, Hui 1
刊名	JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
	2018-03-01
卷号	51 页码:27-36
关键词	Shale Slick water fracturing fluid Pore structure Adsorption capacity
ISSN号	1875-5100
DOI	10.1016/j.jngse.2017.12.030
文献子类	Article
英文摘要	The shale-fracturing fluid interaction and its effects on the pore structures and adsorption characteristics of shale are the key factors affecting shale gas exploration. To address this problem, the black shale samples obtained from the Lower Silurian Longmaxi Formation in Sichuan Basin, China were exposed to slick water fracturing fluid at the simulation conditions of 100 degrees C and 50 MPa for 72 h through a fluid-rock interaction simulation instrument. The slick water fracturing fluid contained 0.2 wt.% friction reducer, 1 wt.% clay control agent, 0.15 wt.% cleanup agent and 0.05 wt.% demulsifier. The mineral composition, pore structure and methane adsorption capacity of shale samples before and after slick water fracturing fluid treatment were measured by X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), low-pressure nitrogen adsorption and methane isothermal adsorption experiments using the gravimetric method. The results showed that the carbonate minerals were dissolved during treatment, and as a result, the samples developed many dissolution pores measuring 2-5 mu m in diameter, while the other minerals remained relatively undisturbed. The specific surface area and total pore volume of shale sample were reduced after the reaction, and the shale-fracturing fluid interaction exhibited a stronger influence on the mesopores. However, the average pore diameter of nanopore was enlarged after the reaction, increasing from 4.29 nm to 4.78 nm. The changes of fractal dimensions suggested an increase in the roughness of pore surfaces, and the pore structure became more regular. The methane adsorption capacity in shale treated with fracturing fluid was reduced from 1.23 mmol/g to 0.95 mmol/g. The changes in the pore structure and adsorption characteristics of shale could affect the gas flow and gas adsorption capacity. These results indicated that the slick water fracturing fluid may play an important role in shale matrix stimulation.
WOS关键词	PRESSURE METHANE SORPTION ; SILURIAN LONGMAXI SHALES ; ORGANIC-RICH SHALES ; SICHUAN BASIN ; FRACTAL CHARACTERISTICS ; STORAGE CAPACITY ; THERMAL MATURITY ; MARCELLUS SHALE ; BARNETT SHALE ; GAS-RESERVOIR
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000426150900004
资助机构	Chinese Academy of Sciences Key Project(XDB10030404) ; Chinese Academy of Sciences Key Project(XDB10030404) ; National Key R&D Program of China(2017YFA0604803) ; National Key R&D Program of China(2017YFA0604803) ; National Natural Science Foundation of China(41572350 ; National Natural Science Foundation of China(41572350 ; Western Light Project ; Western Light Project ; Key Laboratory of Gansu Province(1309RTSA041) ; Key Laboratory of Gansu Province(1309RTSA041) ; 41503049) ; 41503049) ; Chinese Academy of Sciences Key Project(XDB10030404) ; Chinese Academy of Sciences Key Project(XDB10030404) ; National Key R&D Program of China(2017YFA0604803) ; National Key R&D Program of China(2017YFA0604803) ; National Natural Science Foundation of China(41572350 ; National Natural Science Foundation of China(41572350 ; Western Light Project ; Western Light Project ; Key Laboratory of Gansu Province(1309RTSA041) ; Key Laboratory of Gansu Province(1309RTSA041) ; 41503049) ; 41503049) ; Chinese Academy of Sciences Key Project(XDB10030404) ; Chinese Academy of Sciences Key Project(XDB10030404) ; National Key R&D Program of China(2017YFA0604803) ; National Key R&D Program of China(2017YFA0604803) ; National Natural Science Foundation of China(41572350 ; National Natural Science Foundation of China(41572350 ; Western Light Project ; Western Light Project ; Key Laboratory of Gansu Province(1309RTSA041) ; Key Laboratory of Gansu Province(1309RTSA041) ; 41503049) ; 41503049) ; Chinese Academy of Sciences Key Project(XDB10030404) ; Chinese Academy of Sciences Key Project(XDB10030404) ; National Key R&D Program of China(2017YFA0604803) ; National Key R&D Program of China(2017YFA0604803) ; National Natural Science Foundation of China(41572350 ; National Natural Science Foundation of China(41572350 ; Western Light Project ; Western Light Project ; Key Laboratory of Gansu Province(1309RTSA041) ; Key Laboratory of Gansu Province(1309RTSA041) ; 41503049) ; 41503049)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82874]
专题	中国科学院地质与地球物理研究所
通讯作者	Wei, Zhifu; Wang, Yongli
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Gansu Prov Key Lab Petr Resources Res, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Downhole Operat Branch Daqing Oilfield, Daqing 163000, Peoples R China 5.Northeastern Univ Qinhuangdao, Dept Environm Sci & Technol, Qinhuangdao 066004, Peoples R China
推荐引用方式 GB/T 7714	Sun, Zepeng,Zhang, Hailong,Wei, Zhifu,et al. Effects of slick water fracturing fluid on pore structure and adsorption characteristics of shale reservoir rocks[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2018,51:27-36.
APA	Sun, Zepeng.,Zhang, Hailong.,Wei, Zhifu.,Wang, Yongli.,Wu, Baoxiang.,...&Yang, Hui.(2018).Effects of slick water fracturing fluid on pore structure and adsorption characteristics of shale reservoir rocks.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,51,27-36.
MLA	Sun, Zepeng,et al."Effects of slick water fracturing fluid on pore structure and adsorption characteristics of shale reservoir rocks".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 51(2018):27-36.