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Pore Type, Pore Structure, and Controlling Factors in the Late Triassic Lacustrine Yanchang Shale, Ordos Basin, China

文献类型：期刊论文

作者Cheng, Ming1,2,4; Lei, Yuhong1,2; Luo, Xiaorong1,2; Zhang, Likuan1,2; Wang, Xiangzeng3,4; Zhang, Lixia3,4; Jiang, Chengfu3,4; Yin, Jintao3,4
刊名ENERGIES
出版日期2021-06-01
卷号14期号:11页码:25
关键词pore type pore structure controlling factors Yanchang Shale Ordos Basin
DOI10.3390/en14113053
英文摘要Organic-rich lacustrine shales in the Upper Triassic Yanchang Formation with thermal maturity mainly in the oil window are the main shale oil and shale gas system in the lacustrine strata of the Ordos Basin, China. Pore systems are important for the storage and transfer of shale oil and gas. The main objectives of this study are to identify the pore types and pore structures and investigate the controlling factors for pore types, pore structures, and total porosities of the lacustrine Yanchang Shale. In this study, organic-rich mudstones, mudstones with siltstone interlayers, siltstone, and sandstones were selected from 15 wells in the southern Ordos Basin. X-ray diffraction, pyrolysis, scanning electron microscopy (SEM), low-pressure nitrogen adsorption analysis, and helium porosimetry were conducted to investigate the mineral compositions, pore types, pore structures, porosities, and controlling factors. Siltstone and sandstone interlayers heterogeneously developed in the Yanchang Shale. The petrology, mineral composition, geochemistry, pore type, pore structure, and porosity of siltstone interlayers are different from those of mudstones. The siltstone and sandstone interlayers usually have more quartz and feldspars, greater detrital grain sizes, and relatively better grain sorting but are lower in clay minerals, total organic carbon (TOC), amount of free liquid hydrocarbons values (S-1), and total residual hydrocarbons values (S-2), compared to mudstones. Interparticle (interP), intraparticle (intraP) pores, and organic pores (OPs) were developed in both siltstones and mudstones. OPs were observed in samples with lower thermal maturity (e.g., 0.5-0.85%). The inorganic pore size is greater than that of OPs. Additionally, the inorganic pore diameters in siltstone interlayers are also greater than those in mudstones. Organic-rich mudstones generally have higher pore volumes (PVs) of pores with sizes less than 10 nm, pore volumes of pores with sizes between 10 and 50 nm (PV, 10-50 nm), and specific surface area (SSA), but they have lower PVs of pores with sizes greater than 50 nm, total PV, and porosity when compared to siltstone and sandstone interlayers. The dominant pore type in mudstones is OPs and TOC (first order), sources and OM types (second order), and thermal maturity (third order), while the abundances of rigid grains with greater sizes and grain sorting are the main controlling factors of pore structures, SSA and PV. Both inorganic pores and organic pores are abundant in the siltstone interlayers. The pore size distribution (PSD), PV, and porosity of siltstone interlayers are related to the abundance of rigid grains (first order), grain sorting (second order), grain size (third order), and carbonate cement content. The total PV and porosity of Yanchang Shale reservoirs may have increased with the increased abundance of siltstone and sandstone interlayers.
WOS关键词NANOPOROUS PYROBITUMEN RESIDUES ; ORGANIC-MATTER ; ZHANGJIATAN SHALE ; MATURATION ; POROSITY ; SYSTEM ; AREA
资助项目Chinese National Major Fundamental Research Developing Project[2017ZX05008-004] ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA14010202] ; Chinese National Natural Science Foundation[41902136] ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD.[ycsy2017-ky-A-20]
WOS研究方向Energy & Fuels
语种英语
WOS记录号WOS:000659844000001
出版者MDPI
资助机构Chinese National Major Fundamental Research Developing Project ; Chinese National Major Fundamental Research Developing Project ; Chinese National Major Fundamental Research Developing Project ; Chinese National Major Fundamental Research Developing Project ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Chinese National Major Fundamental Research Developing Project ; Chinese National Major Fundamental Research Developing Project ; Chinese National Major Fundamental Research Developing Project ; Chinese National Major Fundamental Research Developing Project ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Chinese National Major Fundamental Research Developing Project ; Chinese National Major Fundamental Research Developing Project ; Chinese National Major Fundamental Research Developing Project ; Chinese National Major Fundamental Research Developing Project ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Chinese National Major Fundamental Research Developing Project ; Chinese National Major Fundamental Research Developing Project ; Chinese National Major Fundamental Research Developing Project ; Chinese National Major Fundamental Research Developing Project ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Opening Foundation of Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Chinese National Natural Science Foundation ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD. ; Science and Technology Planning Project of Shaanxi Yanchang Petroleum (Group) Corp., LTD.
源URL[http://ir.iggcas.ac.cn/handle/132A11/102055]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Lei, Yuhong
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
3.Res Inst Shaanxi Yanchang Petr Grp Co, Xian 710075, Peoples R China
4.Shaanxi Key Lab Lacustrine Shale Gas Accumulat &, Xian 710075, Peoples R China
推荐引用方式
GB/T 7714		 Cheng, Ming,Lei, Yuhong,Luo, Xiaorong,et al. Pore Type, Pore Structure, and Controlling Factors in the Late Triassic Lacustrine Yanchang Shale, Ordos Basin, China[J]. ENERGIES,2021,14(11):25.
APA Cheng, Ming.,Lei, Yuhong.,Luo, Xiaorong.,Zhang, Likuan.,Wang, Xiangzeng.,...&Yin, Jintao.(2021).Pore Type, Pore Structure, and Controlling Factors in the Late Triassic Lacustrine Yanchang Shale, Ordos Basin, China.ENERGIES,14(11),25.
MLA Cheng, Ming,et al."Pore Type, Pore Structure, and Controlling Factors in the Late Triassic Lacustrine Yanchang Shale, Ordos Basin, China".ENERGIES 14.11(2021):25.

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来源：地质与地球物理研究所

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