Pore structure and adsorption capacity of shale in the Lower Cambrian Shuijingtuo Formation in the southern flank of Huangling anticline,western Hubei
He Jing1, He Sheng1, Liu Zaoxue2, Zhai Gangyi3, Wang Yi2, Han Yuanjia1, Wan Kuo1, Wei Sile1
1. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Hubei Wuhan 430074, China;
2. Hubei Institute of Geological Survey, Hubei Wuhan 430030, China;
3. Oil&Gas Survey Center, China Geological Survey, Beijing 100029, China
Aiming at the marine organic-rich shale in the Lower Cambrian Shuijingtuo Formation in the Well Zidi2 in the southern flank of the Huangling anticline in western Hubei, this study selects shale samples from the first and second members of Shuijingtuo Formation. Using the multi-scale testing techniques such as CO2 and N2 physical absorption, high-pressure mercury injection, and argon ion polishing-field emission scanning electron microscope (FE-SEM) the observation methods for pore structure and the statistical analysis methods of organic pores in combination with methane isothermal adsorption experiments and other basic testing methods, this paper describes the geochemistry, mineral composition and lithofacies characteristics of shale, investigates the pore type, pore shape, pore size distribution and specific surface area of shale and other pore structure parameters, analyzes the methane adsorption capacity of shale, and explores the factors affecting the pore development and pore structure of shale. The research results show that Ro of the organic-rich black shale in the first and second members of Shuijingtuo Formation in the Well Zidi2 is about 2.5%, and the shale lithofacies are mainly siliceous shale, migmatitic shale, and clayey shale; organic pores of shale have various shapes, irregular boundaries, and small pore sizes, most of which have a pore diameter of less than 50 nm. Inorganic pores/seams are abundant, with various types of geneses and variable shapes micropores in shale (pore size of 0.3-2.0 nm) develops well, and organic mesopores occupy a large proportion in mesopores with the pore size of 2-5 nm; inorganic pores are dominant in mesopores with a pore size> 5nm and macropores. Shale has a large specific surface area and strong methane adsorption capacity; the pore structure and adsorption capacity of siliceous shale are even better. The organic carbon content, carbonate mineral and clay mineral content of shale, shale lithofacies and other factors have important effects on the pore development and pore structure of shale.
通讯作者:
何生,男,1956年1月生,1982年获武汉地质学院学士学位,2002年获Curtin University of Technology博士学位,现为中国地质大学(武汉)教授、博士生导师,主要从事油气地质教学和科研工作。Email:shenghe@cug.edu.cn
E-mail: shenghe@cug.edu.cn
何晶, 何生, 刘早学, 翟刚毅, 王亿, 韩元佳, 万阔, 魏思乐. 鄂西黄陵背斜南翼下寒武统水井沱组页岩孔隙结构与吸附能力[J]. 石油学报, 2020, 41(1): 27-42.
He Jing, He Sheng, Liu Zaoxue, Zhai Gangyi, Wang Yi, Han Yuanjia, Wan Kuo, Wei Sile. Pore structure and adsorption capacity of shale in the Lower Cambrian Shuijingtuo Formation in the southern flank of Huangling anticline,western Hubei[J]. Acta Petrolei Sinica, 2020, 41(1): 27-42.
LUO Shengyuan,CHEN Xiaohong,LIU An,et al.Characteristics and geological significance of canister desorption gas from the Lower Cambrian Shuijingtuo Formation shale in Yichang area,Middle Yangtze region[J].Acta Petrolei Sinica,2019,40(8):941-955.
DONG Dazhong,ZOU Caineng,YANG Hua,et al.Progress and prospects of shale gas exploration and development in China[J].Acta Petrolei Sinica,2012,33(S1):107-114.
WEI Zhihong,WEI Xiangfeng.Comparison of gas-bearing property between different pore types of shale:a case from the Upper Ordovician Wufeng and Longmaxi Fms in the Jiaoshiba area,Sichuan Basin[J].Natural Gas Industry,2014,34(6):37-41.
[5]
WEI Sile,HE Sheng,PAN Zhejun,et al.Models of shale gas storage capacity during burial and uplift:application to Wufeng-Longmaxi shales in the Fuling shale gas field[J].Marine and Petroleum Geology,2019,109:233-244.
ZHAI Gangyi,WANG Yufang,BAO Shujing,et al.Major factors controlling the accumulation and high productivity of marine shale gas and prospect forecast in southern China[J].Earth Science,2017,42(7):1057-1068.
NIE Haikuan,TANG Xuan,BIAN Ruikang.Controlling factors for shale gas accumulation and prediction of potential development area in shale gas reservoir of South China[J].Acta Petrolei Sinica,2009,30(4):484-491.
NIE Haikuan,ZHANG Jinchuan,LI Yuxi,et al.Accumulation conditions of the Lower Cambrian shale gas in the Sichuan Basin and its periphery[J].Acta Petrolei Sinica,2011,32(6):959-967.
ZHAI Gangyi,BAO Shujing,WANG Yufang,et al.Reservoir accumulation model at the edge of palaeohigh and significant discovery of shale gas in Yichang area,Hubei province[J].Acta Geoscientica Sinica,2017,38(4):441-447.
HE Chencheng,HE Sheng,GUO Xusheng,et al.Structural differences in organic pores between shales of the Wufeng Formation and of the Longmaxi Formation's first Member,Jiaoshiba Block,Sichuan Basin[J].Oil & Gas Geology,2018,39(3):472-484.
YANG Rui,HE Sheng,HU Dongfeng,et al.Characteristics and the main controlling factors of micro-pore structure of the shale in Wufeng Formation-Longmaxi Formation in Jiaoshiba Area[J].Geological Science and Technology Information,2015,34(5):105-113.
PENG Nüjia,HE Sheng,HAO Fang,et al.The pore structure and difference between Wufeng and Longmaxi shales in Pengshui area,southeastern Sichuan[J].Earth Science,2017,42(7):1134-1146.
SHAN Changan,ZHANG Tingshan,GUO Junjie,et al.Geological characteristics and resource potential of the Upper Sinian Doushantuo Formation shale gas in the north of middle Yangtze region[J].Geology in China,2015,42(6):1944-1958.
LI Hai,LIU An,LUO Shengyuan,et al.Pore structure characteristics and development control factors of Cambrian shale in the Yichang area,western Hubei[J].Petroleum Geology and Recovery Efficiency,2018,25(6):16-23.
ZHANG Jiazheng,ZHU Di,CI Xinghua,et al.Characteristics of carbon isotope while drilling and exploration significance of shale gas in Niutitang and Doushantuo formations in Well Eyangye-2,Yichang,Hubei,China[J].Acta Petrolei Sinica,2019,40(11):1346-1357.
WANG Kongwei,ZHANG Fan,QIU Dianming.Relation of Huangling anticline and Landslide group in the Three Gorges reservoir area[J].Journal of Jilin University:Earth Science Edition,2015,45(4):1142-1154.
GE Xiaohong,WANG Minpei,LIU Junlai.Redefining the Sichuan Movement and the age and background of Qingzang Plateau's first uplift:The implication of Huangling anticline and its enlightenment[J].Earth Science Frontiers,2010,17(4):206-217.
XU Daliang,PENG Lianhong,LIU Hao,et al.Meso-Cenozoic tectono-sedimentary response of multi-phased uplifts of Huangling anticline,Central China[J].Geology and Mineral Resources of South China,2013,29(2):90-99.
CHEN Xiaohong,WEI Kai,ZHANG Baoming,et al.Main geological factors controlling shale gas reservior in the Cambrian Shuijingtuo Formation in Yichang of Hubei province as well as its and enrichment patterns[J].Geology in China,2018,45(2):207-226.
XIE Xiaoyong,TANG Hongming,WANG Chunhua,et al.Contrast of nitrogen adsorption method and mercury porosimetry method in analysis of shale's pore size distribution[J].Natural Gas Industry,2006,26(12):100-102.
[24]
CURTIS M E,SONDERGELD C H,AMBROSE R J,et al.Microstructural investigation of gas shales in two and three dimensions using nanometer-scale resolution imaging[J].AAPG Bulletin,2012,96(4):665-677.
WU Yue,FAN Tailiang,JIANG Shu,et al.Characterizing techniques and classification methods for microscope pore system in marine shale reservoir[J].Geological Science and Technology Information,2014,33(4):91-97.
LIU Dehan,XIAO Xianming,TIAN Hui,et al.Sample maturation calculated using Raman spectroscopic parameters for solid organics:methodology and geological applications[J].Chinese Science Bulletin,2013,58(11):1285-1298.
WU Lanyu,HU Dongfeng,LU Yongchao,et al.Advantageous shale lithofacies of Wufeng Formation-Longmaxi Formation in Fuling gas field of Sichuan Basin,SW China[J].Petroleum Exploration and Development,2016,43(2):189-197.
[28]
LOUCKS R G,REED R M,RUPPEL S C,et al.Spectrum of pore types and networks in mudrocks and a descriptive classification for matrix-related mudrock pores[J].AAPG Bulletin,2012,96(6):1071-1098.
[29]
GAN H,NANDI S P,WALKER P L.Nature of the porosity in American coals[J].Fuel,1972,51(4):272-277.
[30]
THOMMES M,KANEKO K,NEIMARK A V,et al.Physisorption of gases,with special reference to the evaluation of surface area and pore size distribution (IUPAC Technical Report)[J].Pure & Applied Chemistry,2015,87(9/10):1051-1069.
[31]
BARRETT E P,JOYNER L G,HALENDA P P.The determination of pore volume and area distributions in porous substances.I.Computations from nitrogen isotherms[J].Journal of the American Chemical Society,1951,73(1):373-380.
JARVIE D M,HILL R J,RUBLE T E,et al.Unconventional shale-gas systems:the Mississippian Barnett Shale of north-central Texas as one model for thermogenic shale-gas assessment[J].AAPG Bulletin,2007,91(4):475-499.
[34]
ROSS D J K,BUSTIN R M.Shale gas potential of the Lower Jurassic Gordondale Member,northeastern British Columbia,Canada[J].Bulletin of Canadian Petroleum Geology,2007,55(1):51-75.
[35]
CHALMERS G R L,BUSTIN R M.Lower Cretaceous gas shales in northeastern British Columbia,Part I:geological controls on methane sorption capacity[J].Bulletin of Canadian Petroleum Geology,2008,56(1):1-21.
HOU Yuguang,HE Sheng,YI Jizheng,et al.Effect of pore structure on methane sorption capacity of shales[J].Petroleum Exploration and Development,2014,41(2):248-256.