Characterization method of shale pore structure based on nano-CT: a case study of Well JY-1

doi:10.7623/syxb201811005

Acta Petrolei Sinica ›› 2018, Vol. 39 ›› Issue (11): 1253-1261.DOI: 10.7623/syxb201811005

• Petroleum Exploration • Previous Articles Next Articles

Characterization method of shale pore structure based on nano-CT: a case study of Well JY-1

Gou Qiyang¹, Xu Shang¹, Hao Fang², Lu Yangbo¹, Zhang Aihua¹, Wang Yuxuan¹, Cheng Xuan¹, Qing Jiawei¹

1. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education;Faculty of Earth Resources, China University of Geosciences, Hubei Wuhan 430074, China;
2. School of Geosciences, China University of Petroleum, Shandong Qingdao 266580, China

Received:2018-05-03 Revised:2018-08-20 Online:2018-11-25 Published:2018-12-10

纳米CT页岩孔隙结构表征方法——以JY-1井为例

苟启洋¹, 徐尚¹, 郝芳², 陆扬博¹, 张爱华¹, 王雨轩¹, 程璇¹, 青加伟¹

1. 构造与油气资源教育部重点实验室中国地质大学资源学院湖北武汉 430074;
2. 中国石油大学地球科学与技术学院山东青岛 266580

通讯作者: 徐尚,男,1985年5月生,2009年获长江大学资源勘查工程专业学士学位,2015年获中国石油大学(北京)地质资源与地质工程专业博士学位,现为中国地质大学(武汉)资源学院副教授,主要从事油气成藏机理和非常规油气地质研究。Email:xushang0222@163.com
作者简介:苟启洋,男,1994年9月生,2017年获中国地质大学(北京)矿产普查与勘探专业学士学位,现为中国地质大学(武汉)资源学院硕士研究生,主要从事非常规油气研究。Email:1219294089@qq.com
基金资助:
国家自然科学基金重大项目（No.41690134，No.41690131）、国家自然科学基金青年科学基金项目（No.41702155）和国家科技重大专项（2016ZX05034-002-003）资助。

Abstract

Abstract:

An analysis on nanoporous structure of organic-rich shale is the basis for evaluating the reserving properties of shale reservoirs and the exploration and development potential of shale gas resources. In this study, the nano-CT and 3D reconstruction technique is used to evaluate the shale pore characteristics and connectivity of the Lower Silurian Longmaxi Formation in the Jiaoshiba area of Sichuan Basin. The experimental results show that:(1)nano-CT can display the three-dimensional spatial structure of shale pores, and will be more conducive to characterize the shale pore characteristics in combination with other experimental methods; (2)based on nano-CT, four components including matrix minerals, organic matter, pores, and high-density minerals (such as pyrite)can be distinguished in shale samples with the volume ratio of 89.20%, 6.22%, 2.71% and 1.87% respectively; (3)the pore sizes evaluated by nano-CT range from 79 nm to 4.7 μm, dominated by 100~500 nm, mainly including organic pores and inorganic pores; (4)strong heterogeneity exists in shale pore, generally with better connectivity, dominated by grade Ⅲ connectivity domains.

Key words: shale, nano-CT, pore structure characterization, pore connectivity, Jiaoshiba area

摘要：

分析富有机质页岩的纳米孔隙结构是评价页岩储集性能和页岩气资源勘探开发潜力的基础。利用纳米CT及三维重构技术评价四川盆地焦石坝地区下志留统龙马溪组页岩的孔隙特征及连通性，结果表明：①纳米CT可以展现页岩孔隙的三维空间结构，结合其他实验方法更有利于表征页岩的孔隙特征；②基于纳米CT可将焦石坝页岩样品的组分分为基质矿物、有机质、孔隙和高密度矿物（如黄铁矿），其体积比分别为89.20%、6.22%、2.71%和1.87%；③焦石坝页岩的孔径分布范围为79~4 700 nm，以100~500 nm为主，包括有机孔隙和无机孔隙；④焦石坝页岩孔隙的非均质性较强，总体具有较好的连通性，以Ⅲ级连通域为主。

关键词: 页岩, 纳米CT, 孔隙结构表征, 孔隙连通性, 焦石坝地区

CLC Number:

TE122.2

Gou Qiyang, Xu Shang, Hao Fang, Lu Yangbo, Zhang Aihua, Wang Yuxuan, Cheng Xuan, Qing Jiawei. Characterization method of shale pore structure based on nano-CT: a case study of Well JY-1[J]. Acta Petrolei Sinica, 2018, 39(11): 1253-1261.

苟启洋, 徐尚, 郝芳, 陆扬博, 张爱华, 王雨轩, 程璇, 青加伟. 纳米CT页岩孔隙结构表征方法——以JY-1井为例[J]. 石油学报, 2018, 39(11): 1253-1261.

References

[1] 张金川,金之钧,袁明生.页岩气成藏机理和分布[J].天然气工业,2004,24(7):15-18.
ZHANG Jinchuan,JIN Zhijun,YUAN Mingsheng.Reservoiring mechanism of shale gas and its distribution[J].Natural Gas Industry,2004,24(7):15-18.
[2] CURTIS J B.Fractured shale-gas systems[J].AAPG Bulletin,2002,86(11):1921-1938.
[3] ROSS D J K,BUSTIN R M.The importance of shale composition and pore structure upon gas storage potential of shale gas reservoirs[J].Marine and Petroleum Geology,2009,26(6):916-927.
[4] SLATT R M,O'BRIEN N R.Pore types in the Barnett and Woodford gas shales:contribution to understanding gas storage and migration pathways in fine-grained rocks[J].AAPG Bulletin,2011,95(12):2017-2030.
[5] 朱如凯,吴松涛,苏玲,等.中国致密储层孔隙结构表征需注意的问题及未来发展方向[J].石油学报,2016,37(11):1323-1336.
ZHU Rukai,WU Songtao,SU Ling,et al.Problems and future works of porous texture characterization of tight Reservoirs in China[J].Acta Petrolei Sinica,2016,37(11):1323-1336.
[6] CHALMERS G R,BUSTIN R M,POWER I M.Characterization of gas shale pore systems by porosimetry,pycnometry,surface area,and field emission scanning electron microscopy/transmission electron microscopy image analyses:examples from the Barnett,Woodford,Haynesville,Marcellus,and Doig unit[J].AAPG Bulletin,2012,96(6):1099-1119.
[7] MASTALERZ M,SCHIMMELMANN A,DROBNIAK A,et al.Porosity of Devonian and Mississippian New Albany Shale across a maturation gradient:insights from organic petrology,gas adsorption,and mercury intrusion[J].AAPG Bulletin,2013,97(10):1621-1643.
[8] 姜振学,唐相路,李卓,等.川东南地区龙马溪组页岩孔隙结构全孔径表征及其对含气性的控制[J].地学前缘,2016,23(2):126-134.
JIANG Zhenxue,TANG Xianglu,LI Zhuo,et al.The whole-aperture pore structure characteristics and its effect on gas content of the Longmaxi Formation shale in the southeastern Sichuan Basin[J].Earth Science Frontiers,2016,23(2):126-134.
[9] 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.
[10] 纪文明,宋岩,姜振学,等.四川盆地东南部龙马溪组页岩微-纳米孔隙结构特征及控制因素[J].石油学报,2016,37(2):182-195.
JI Wenming,SONG Yan,JIANG Zhenxue,et al.Micro-nano pore structure characteristics and its control factors of shale in Longmaxi Formation,southeastern Sichuan Basin[J].Acta Petrolei Sinica,2016,37(2):182-195.
[11] WANG Pengfei,JIANG Zhenxue,CHEN Lei,et al.Pore structure characterization for the Longmaxi and Niutitang shales in the Upper Yangtze Platform,South China:evidence from focused ion beam-He ion microscopy,nano-computerized tomography and gas adsorption analysis[J].Marine and Petroleum Geology,2016,77:1323-1337.
[12] 郭雪晶,何顺利,陈胜,等.基于纳米CT及数字岩心的页岩孔隙微观结构及分布特征研究[J].中国煤炭地质,2016,28(2):28-34.
GUO Xuejing,HE Shunli,CHEN Sheng,et al.Research on microstructure of shale pores and distribution features based on nano-CT scanning and digital core analysis[J].Coal Geology of China,2016,28(2):28-34.
[13] 何治亮,聂海宽,张钰莹.四川盆地及其周缘奥陶系五峰组-志留系龙马溪组页岩气富集主控因素分析[J].地学前缘,2016,23(2):8-17.
HE Zhiliang,NIE Haikuan,ZHANG Yuying.The main factors of shale gas enrichment of Ordovician Wufeng Formation-Silurian Longmaxi Formation in the Sichuan Basin and its adjacent areas[J].Earth Science Frontiers,2016,23(2):8-17.
[14] 郭彤楼.涪陵页岩气田发现的启示与思考[J].地学前缘,2016,23(1):29-43.
GUO Tonglou.Discovery and characteristics of the Fuling shale gas field and its enlightenment and thinking[J].Earth Science Frontiers,2016,23(1):29-43.
[15] 陈尚斌,朱炎铭,王红岩,等.四川盆地南缘下志留统龙马溪组页岩气储层矿物成分特征及意义[J].石油学报,2011,32(5):775-782.
CHEN Shangbin,ZHU Yanming,WANG Hongyan,et al.Characteristics and significance of mineral compositions of Lower Silurian Longmaxi Formation shale gas reservoir in the southern margin of Sichuan Basin[J].Acta Petrolei Sinica,2011,32(5):775-782.
[16] CHEN Lei,LU Yongchao,JIANG Shu,et al.Heterogeneity of the Lower Silurian Longmaxi marine shale in the southeast Sichuan Basin of China[J].Marine and Petroleum Geology,2015,65:232-246.
[17] 王玉满,董大忠,黄金亮,等.四川盆地及周边上奥陶统五峰组观音桥段岩相特征及对页岩气选区意义[J].石油勘探与开发,2016,43(1):42-50.
WANG Yuman,DONG Dazhong,HUANG Jinliang,et al.Guan-yinqiao member lithofacies of the upper ordovician Wufeng Formation around the Sichuan Basin and the significance to shale gas plays,SW China[J].Petroleum Exploration and Development,2016,43(1):42-50.
[18] 秦华,范小军,刘明,等.焦石坝地区龙马溪组页岩解吸气地球化学特征及地质意义[J].石油学报,2016,37(7):846-854.
QIN Hua,FAN Xiaojun,LIU Ming,et al.Geochemical characteristics and geological significance of desorbed shale gas in Longmaxi Formation,Jiaoshiba area[J].Acta Petrolei Sinica,2016,37(7):846-854.
[19] 刘文平,张成林,高贵冬,等.四川盆地龙马溪组页岩孔隙度控制因素及演化规律[J].石油学报,2017,38(2):175-184.
LIU Wenping,ZHANG Chenglin,GAO Guidong,et al.Control-ling factors and evolution laws of shale porosity in Longmaxi Formation,Sichuan Basin[J].Acta Petrolei Sinica,2017,38(2):175-184.
[20] 邹才能,陶士振,侯连华,等.非常规油气地质[M].2版.北京:地质出版社,2013.
ZOU Caineng,TAO Shizhen,HOU Lianhua,et al.Unconventional petrolum geology[M].2nd ed.Beijing:Geological Publishing House,2013.
[21] 聂海宽,金之钧,边瑞康,等.四川盆地及其周缘上奥陶统五峰组-下志留统龙马溪组页岩气"源-盖控藏"富集[J].石油学报,2016,37(5):557-571.
NIE Haikuan,JIN Zhijun,BIAN Ruikang,et al.The "source-cap hydrocarbon-controlling" enrichment of shale gas in Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation of Sichuan Basin and its periphery[J].Acta Petrolei Sinica,2016,37(5):557-571.
[22] YANG Rui,HE Sheng,HU Qinhong,et al.Pore characterization and methane sorption capacity of over-mature organic-rich Wufeng and Longmaxi shales in the southeast Sichuan Basin,China[J].Marine and Petroleum Geology,2016,77:247-261.
[23] 林承焰,王杨,杨山,等.基于CT的数字岩心三维建模[J].吉林大学学报:地球科学版,2018(1):307-317.
LIN Chengyan,WANG Yang,YANG Shan,et al.3D modeling of digital core based on X-ray computed tomography[J].Journal of Jilin University:Earth Science Edition,2018(1):307-317.
[24] SUN Liang,WANG Xiaoqi,JIN Xu,et al.Three dimensional characterization and quantitative connectivity analysis of micro/Nano pore space[J].Petroleum Exploration and Development,2016,43(3):537-546.
[25] 吴松涛,朱如凯,崔京钢,等.鄂尔多斯盆地长7湖相泥页岩孔隙演化特征[J].石油勘探与开发,2015,42(2):167-176.
WU Songtao,ZHU Rukai,CUI Jinggang,et al.Characteristics of lacustrine shale porosity evolution,Triassic Chang 7 Member,Ordos Basin,NW China[J].Petroleum Exploration and Development,2015,42(2):167-176.
[26] YANG Rui,HE Sheng,YI Jizheng,et al.Nano-scale pore structure and fractal dimension of organic-rich Wufeng-Longmaxi shale from Jiaoshiba area,Sichuan Basin:investigations using FE-SEM,gas adsorption and helium pycnometry[J].Marine and Petroleum Geology,2016,70:27-45.
[27] TANG Xianlu,JIANG Zhenxue,JIANG Shu,et al.Heterogeneous nanoporosity of the Silurian Longmaxi Formation shale gas reservoir in the Sichuan Basin using the QEMSCAN,FIB-SEM,and nano-CT methods[J].Marine and Petroleum Geology,2016,78:99-109.
[28] 刘猛,刘超,舒志恒,等.四川盆地涪陵焦石坝地区黑色页岩非均质性特征及控制因素[J].石油实验地质,2018,40(1):118-125.
LIU Meng,LIU Chao,SHU Zhiheng,et al.Heterogeneity characteristics and controlling factors of black shale in Jiaoshiba,Fuling,Sichuan Basin[J].Petroleum Geology and Experiment,2018,40(1):118-125.
[29] 张晓明,石万忠,徐清海,等.四川盆地焦石坝地区页岩气储层特征及控制因素[J].石油学报,2015,36(8):926-939.
ZHANG Xiaoming,SHI Wanzhong,XU Qinghai,et al.Reservoir characteristics and controlling factors of shale gas in Jiaoshiba area,Sichuan Basin[J].Acta Petrolei Sinica, 2015,36(8):926-939.
[30] 金之钧,胡宗全,高波,等.川东南地区五峰组-龙马溪组页岩气富集与高产控制因素[J].地学前缘,2016,23(1):1-10.
JIN Zhijun,HU Zongquan,GAO Bo,et al.Controlling factors on the enrichment and high productivity of shale gas in the Wufeng-Longmaxi Formations,southeeastern Sichuan Basin[J].Earth Science Frontiers,2016,23(1):1-10.
[31] 赵建林,姚军,张磊,等.微裂缝对致密多孔介质中气体渗流的影响机制[J].中国石油大学学报(自然科学版),2018,42(1):90-98.
ZHAO Jianlin,YAO Jun,ZHANG Lei,et al.Effects of micro-fractures on gas flow in tight porous media[J].Journal of China University of Petroleum (Edition of Natural Science),2018,42(1):90-98.
[32] 马中良,郑伦举,徐旭辉,等.富有机质页岩有机孔隙形成与演化的热模拟实验[J].石油学报,2017,38(1):23-30.
MA Zhongliang,ZHENG Lunju,XU Xuhui,et al.Thermal simulation experiment on the formation and evolution of organic pores in organic-rich shale[J].Acta Petrolei Sinica, 2017,38(1):23-30.
[33] LOUCKS R G,REED R M.Scanning-electron-microscope petrographic evidence for distinguishing organic-matter pores associated with depositional organic matter versus migrated organic matter in mudrocks[J].GCAGS Transactions,2014,64:713.
[34] 王飞宇,贺志勇,孟晓辉,等.页岩气赋存形式和初始原地气量(OGIP)预测技术[J].天然气地球科学,2011,22(3):501-510.
WANG Feiyu,HE Zhiyong,MENG Xiaohui,et al.Occurrence of shale gas and prediction of original Gas In-place(OGIP)[J].Natural Gas Geoscience,2011,22(3):501-510.
[35] 薛华庆,王红岩,刘洪林,等.页岩吸附性能及孔隙结构特征——以四川盆地龙马溪组页岩为例[J].石油学报, 2013,34(5):826-832.
XUE Huaqing,WANG Hongyan,LIU Honglin,et al.Adsorption capability and aperture distribution characteristics of shales:taking the Longmaxi Formation shale of Sichuan Basin as an example[J].Acta Petrolei Sinica,2013,34(5):826-832.
[36] WANG Feiyu,GUAN Jing,FENG Weiping,et al.Evolution of overmature marine shale porosity and implication to the free gas volume[J].Petroleum Exploration & Development,2013,40(6):819-824.
[37] FENG Weiping,WANG Feiyu,GUAN Jing,et al.Geologic structure controls on initial productions of lower Silurian Longmaxi shale in south China[J].Marine and Petroleum Geology,2018,91:163-178.
[38] 杨文新,李继庆,苟群芳.四川盆地焦石坝地区页岩吸附特征室内实验[J].天然气地球科学,2017,28(9):1350-1355.
YANG Wenxin,LI Jiqing,GOU Qunfang.Experiment study on shale adsorption properties for Jiaoshiba shale,Sichuan Basin[J].Natural Gas Geoscience,2017,28(9):1350-1355.

Characterization method of shale pore structure based on nano-CT: a case study of Well JY-1

纳米CT页岩孔隙结构表征方法——以JY-1井为例

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	Zou Caineng, Yu Rongze, Zhao Qun, Zhang Xiaowei, Chen Yanpeng, Dong Dazhong, Zhao Suping, Sun Qinping. North American shale revolution and its implications: a full-chain data-driven analysis of 100 000 wells in the Permian super unconventional hydrocarbon basin [J]. Acta Petrolei Sinica, 2026, 47(5): 947-960.
[2]	Liu Huimin, Zhang Kuihua, Li Junliang, Liu Peng, Wang Yong, Zhou Guangqing, Teng Jianbin, Zhang Shun, Zhu Rifang, Miao Zhuowei. Geological characteristics of clay-rich hybrid shale and exploration breakthroughs of shale oil in Jiyang depression,Bohai Bay Basin [J]. Acta Petrolei Sinica, 2026, 47(5): 961-973.
[3]	Tian Hua, Zhao Xiaolin, Guo Xiaowen, Yuan Shengqiang, Li Zhiyun. Quantitative evaluation of shale oil in different occurrence states based on light hydrocarbon recovery: a case study of the Fengcheng Formation shale in Mahu sag,Junggar Basin [J]. Acta Petrolei Sinica, 2026, 47(5): 1014-1023.
[4]	Zeng Fanhui, Jiang Jing, Guo Jianchun, Zhang Yu, Liu Xiaohua. Gas mass transfer model accounting for shale anisotropic characteristics [J]. Acta Petrolei Sinica, 2026, 47(5): 1064-1079.
[5]	Jiang Han, Xian Chenggang, Hong Haitao, Zhang Benjian, Zhao Rongrong, Huang Zisang, Qiu Yuchao, Zhou Hongfei, Han Luyuan. Breakthrough and implications of shale oil exploration in the Jurassic Lianggaoshan Formation at Well Lutan1 in Bashansi syncline of eastern Sichuan Basin [J]. Acta Petrolei Sinica, 2026, 47(4): 721-738.
[6]	Wang Wendong, Deng Yuxuan, Yuan Bin, Lei Zhengdong, Ke Can, Jia Feng, Su Yuliang. Energy management optimization for shale oil development driven by the integrated wind-photovoltaic-geothermal-grid energy system [J]. Acta Petrolei Sinica, 2026, 47(4): 934-946.
[7]	Bai Xuefeng, Lu Jiamin, Zhang Jinyou, Kang Dejiang, Wang Jinwei, Yu Dan, Liu Lijuan. Exploration breakthrough of interbedded shale oil in the Cretaceous Qingshankou Formation in northern Songliao Basin and its major significance [J]. Acta Petrolei Sinica, 2026, 47(3): 511-521.
[8]	Xiong Liang, Wei Limin, Feng Shaoke, Xiong Zhangkai, Li Nanying. Accumulation conditions as well as key exploration and development technologies of Yongchuan shale gas field in Sichuan Basin [J]. Acta Petrolei Sinica, 2026, 47(3): 692-705.
[9]	Wei Zhihong, Wei Xiangfeng, Shi Wenbin, Chen Chao, Liu Xiaojing, Wang Daojun, Wang Dongsheng, Shi Meijing. Geological characteristics and key exploration technologies of Fuxing oilfield in Sichuan Basin [J]. Acta Petrolei Sinica, 2026, 47(3): 706-720.
[10]	Shan Chang'an, Fei Yue, Liang Xing, Zou Chen, Shu Honglin, Wang Gaocheng, Zhang Zhao, Jiang Liwei, Rui Yun, Zhang Hanbing, Mei Jue, Zhang Chao, Gu Xiaomin, Shi Shiling. Comprehensive analysis of low-resistivity marine shale of Longmaxi Formation in Da’an area,western Chongqing: dominant role of water as well as other secondary factors [J]. Acta Petrolei Sinica, 2026, 47(2): 394-407.
[11]	Li Yong, Huang Meng, Lei Zhengdong, Yang Yang, Hou Lianhua, Hou Xiulin, Li Shuai, Hu Shuiqing, Wang Libin, Yang Lifeng, Dong Ruojing. Differentiated geoscience-engineering integrated development strategies for continental shale oil in China [J]. Acta Petrolei Sinica, 2026, 47(2): 437-454.
[12]	Zhao Jinzhou, Yang Junsong, Wei Bing, Wang Xiangzeng, Zhou Bo, Wang Lele, Zhang Xiang, Kadet Valeriy. Research progress and field practice of CO₂ utilization and storage in tight/shale oil and gas reservoirs [J]. Acta Petrolei Sinica, 2026, 47(1): 134-154.
[13]	Jiang Fujie, Zhang Chenxi, Chen Di, Zheng Xiaowei, Zhang Yuqi, Li Jijun, Fan Xiaoqi, Guo Tingwei, Wang Xiaohao, Hu Tao. Research status on oil content of continental shale and a new grading assessment method of resource potential [J]. Acta Petrolei Sinica, 2025, 46(9): 1661-1676.
[14]	Song Yan, Wan Chengxiang. Mechanisms and differences of self-sealing in shale gas reservoirs of Longmaxi Formation in Sichuan Basin [J]. Acta Petrolei Sinica, 2025, 46(9): 1677-1687.
[15]	Zhang Qin, Liu Yu, Qiu Zhen, Liu Wen, Kong Weiliang, Pang Zhenglian, Gao Wanli, Cai Guangyin, Li Xingtao, Lin Wenji. Phase analysis of shale gas occurrence based on carbon isotope fractionation and reservoir properties:a case study of the marine-terrestrial transitional shale in Member 2 of Shanxi Formation, Ordos Basin [J]. Acta Petrolei Sinica, 2025, 46(9): 1707-1719.