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Pore characterization of organic-rich Late Permian Da-long Formation shale in the Sichuan Basin, southwestern China

文献类型：期刊论文

作者Wei, Zhifu1; Wang, Yongli1; Wang, Gen1; Sun, Zepeng1,2; Xu, Liang1,2
刊名FUEL
出版日期2018
卷号211页码:507-516
关键词Pore structure FE-SEM Low-pressure N-2 adsorption Pore size distribution Da-long Formation shales
ISSN号0016-2361
DOI10.1016/j.fuel.2017.09.068
文献子类Article
英文摘要The Late Permian Da-long Formation shale in southern China is regarded as a shale gas reservoir target. However, the lack of fundamental data for shale gas reservoirs increases the difficulty of gas exploration. To understand the pore structure characteristics of these shales, a series of experiments was conducted on Da-long Formation samples collected from the Shangsi Section in the Guangyuan area in the Northwest Sichuan Basin, southwestern China, including total organic carbon (TOC) content, X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM) and low-pressure N-2 adsorption-desorption analyses. The results show that TOC contents vary greatly between the Da-long Formation samples, ranging from 0.14% to 14.40% with an average value of 3.60%. A black shale layer occurs near the middle of the section with a relatively high TOC content ranging from 1.20% to 14.40%. The major components of the mineral matrix are carbonate and quartz minerals. A weakly positive trend between the TOC content of organic-rich shales and the quartz content was observed, indicating that the quartz in these Da-long shale samples is at least partially of biogenic origin. Both mineral matrix and organic matter pores are developed in Da-long black shales, as observed by FE-SEM, along with a few interP and intraP pores and fracture pores. Additionally, with increasing TOC content, the pore size distribution (PSD) curves of organic-rich shale gradually decrease as a result of OM ductility. Bimodal PSD versus surface area and unimodal PSD versus pore volume were measured in the shale samples, indicating that surface area is mainly associated with micropores and fine mesopores (< 10 nm) and larger pores are the dominate contributor to pore volume. Therefore, the pore network in this gas shale reservoir is predominantly associated with organic matter, especially small pores, and the mineral compositions are expected to be responsible for larger pores.
WOS关键词MISSISSIPPIAN BARNETT SHALE ; NORTHEASTERN BRITISH-COLUMBIA ; METHANE SORPTION CAPACITY ; FORT-WORTH BASIN ; GAS-ADSORPTION ; ELECTRON-MICROSCOPY ; GEOLOGICAL CONTROLS ; MERCURY INTRUSION ; THERMAL MATURITY ; SURFACE-AREA
WOS研究方向Energy & Fuels ; Engineering
语种英语
WOS记录号WOS:000413449600051
出版者ELSEVIER SCI LTD
资助机构National Natural Science Foundation of China(41503049 ; National Natural Science Foundation of China(41503049 ; Chinese Academic of Sciences Key Project(XDB10030404) ; Chinese Academic of Sciences Key Project(XDB10030404) ; Western Light General Project ; Western Light General Project ; Key Laboratory Project of Gansu Province(1309RTSA041) ; Key Laboratory Project of Gansu Province(1309RTSA041) ; 41572350) ; 41572350) ; National Natural Science Foundation of China(41503049 ; National Natural Science Foundation of China(41503049 ; Chinese Academic of Sciences Key Project(XDB10030404) ; Chinese Academic of Sciences Key Project(XDB10030404) ; Western Light General Project ; Western Light General Project ; Key Laboratory Project of Gansu Province(1309RTSA041) ; Key Laboratory Project of Gansu Province(1309RTSA041) ; 41572350) ; 41572350) ; National Natural Science Foundation of China(41503049 ; National Natural Science Foundation of China(41503049 ; Chinese Academic of Sciences Key Project(XDB10030404) ; Chinese Academic of Sciences Key Project(XDB10030404) ; Western Light General Project ; Western Light General Project ; Key Laboratory Project of Gansu Province(1309RTSA041) ; Key Laboratory Project of Gansu Province(1309RTSA041) ; 41572350) ; 41572350) ; National Natural Science Foundation of China(41503049 ; National Natural Science Foundation of China(41503049 ; Chinese Academic of Sciences Key Project(XDB10030404) ; Chinese Academic of Sciences Key Project(XDB10030404) ; Western Light General Project ; Western Light General Project ; Key Laboratory Project of Gansu Province(1309RTSA041) ; Key Laboratory Project of Gansu Province(1309RTSA041) ; 41572350) ; 41572350)
源URL[http://ir.iggcas.ac.cn/handle/132A11/61997]  
专题地质与地球物理研究所_兰州油气中心
通讯作者Wang, Yongli; Wang, Gen
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources, Gansu Prov Key Lab Petr Resources Res, Lanzhou 730000, Gansu, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Wei, Zhifu,Wang, Yongli,Wang, Gen,et al. Pore characterization of organic-rich Late Permian Da-long Formation shale in the Sichuan Basin, southwestern China[J]. FUEL,2018,211:507-516.
APA Wei, Zhifu,Wang, Yongli,Wang, Gen,Sun, Zepeng,&Xu, Liang.(2018).Pore characterization of organic-rich Late Permian Da-long Formation shale in the Sichuan Basin, southwestern China.FUEL,211,507-516.
MLA Wei, Zhifu,et al."Pore characterization of organic-rich Late Permian Da-long Formation shale in the Sichuan Basin, southwestern China".FUEL 211(2018):507-516.

入库方式： OAI收割

来源：地质与地球物理研究所

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