川南下寒武统筇竹寺组页岩孔隙结构特征及其主控因素

doi:10.11885/j.issn.1674-5086.2024.12.05.04

摘要/Abstract

摘要： 为评价川南筇竹寺组两类页岩储层特征及差异，基于钻井系统取芯资料，综合运用X衍射、氩离子抛光扫描电镜、高压压汞、低温N$_2$和CO$_2$吸附等实验方法，对两类页岩储层TOC含量、矿物组成、微观孔隙类型、孔隙结构特征及其影响因素开展了研究。研究表明，两类页岩储层均发育多种类型微观孔隙，整体以无机孔为主，富有机质页岩有机孔占比高于含有机质页岩；含有机质页岩(TOC含量 < 1%)孔隙度为4.78%$\sim$6.02%(平均5.22%)，储层孔径以20$\sim$100 nm为主，宏孔为主要储集空间(平均70.10%)；富有机质页岩(TOC含量$\geqslant$1%)孔隙度为3.88%$\sim$7.06%(平均5.53%)，储层孔径分布以1$\sim$50 nm为主，介孔为主要储集空间(平均81.81%)。含有机质页岩微孔比表面积和体积与TOC含量成正相关关系，而富有机质页岩微孔、介孔比表面积和体积均与TOC含量成正相关关系；两类页岩储层与矿物组成关系复杂，石英和长石构建的支撑结构奠定了原始无机孔基础，TOC、黏土矿物及后期成岩矿物等充填于粒间孔改变了孔隙结构，TOC含量的增多在一定程度上提高了有机孔占比。

关键词: 页岩储层, 孔隙类型, 孔隙结构, 筇竹寺组, 川南地区

Abstract: To assess the characteristics and differences of the two types of shale reservoirs within the Qiongzhusi Formation of southern Sichuan Basin, based on the systematic coring data from drilling, a comprehensive application of experimental methods such as X-ray diffraction, argon ion polishing scanning electron microscopy, high-pressure mercury intrusion, low-temperature N$_2$ and CO$_2$ adsorption was employed to conduct research on the TOC content, mineral composition, microscopic pore types, pore structure characteristics, and their influencing factors of the two types of shale reservoirs. The research results indicate that both types of shale reservoirs develop multiple types of microscopic pores, and the overall pore type is mainly inorganic pores. The proportion of organic pores in the organic-rich shale is higher than that in the shale with organic matter. The porosity of the organic-bearing shale (TOC < 1%) ranges from 4.78% to 6.02% (average 5.22%), and the pore size distribution of the reservoir is mainly 20$\sim$100 nm, with macropores being the main reservoir space (average 70.10%). The porosity of the organic-rich shale (TOC $\geqslant$ 1%) ranges from 3.88% to 7.06% (average 5.53%), and the pore size distribution of the reservoir is mainly 1$\sim$50 nm, with mesopores being the main reservoir space (average 81.81%). The specific surface area and volume of micropores in the organic-bearing shale have a positive correlation with the TOC content, while the specific surface area and volume of micropores and mesopores in the organic-rich shale have a positive correlation with the TOC content. The relationship between the two types of shale reservoirs and the mineral composition is complex. The supporting structure constructed by quartz and feldspar lays the foundation of the original inorganic pores, and TOC, clay minerals, and post-diagenetic minerals filling the intergranular pores change the pore structure, and the increasing content of TOC can improve percentage of organic pores.

Key words: shale reservoir, pore type, pore structures, the Qiongzhusi Formation, southern Sichuan Basin

中图分类号:

TE121

罗思聪, 张南希, 王保保, 周桦, 王同. 川南下寒武统筇竹寺组页岩孔隙结构特征及其主控因素[J]. 西南石油大学学报(自然科学版), 2024, 46(6): 91-106.

LUO Sicong, ZHANG Nanxi, WANG Baobao, ZHOU Hua, WANG Tong. Pore Structure Characteristics and Main Controlling Factors of Qiongzhusi Formation Shales of Lower Cambrian, Southern Sichuan Basin[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2024, 46(6): 91-106.

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参考文献

[1] CURTIS J B. Fractured shale-gas systems[J]. AAPG Bulletin, 2002, 86(11): 1921-1938. doi: 10.1306/61EEDDBE-173E-11D7-8645000102C1865D
[2] 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. doi: 10.1306/10171111052
[3] 张金川，李振，王东升，等. 中国页岩气成藏模式[J]. 天然气工业， 2022， 42（8）： 78-95. doi： 10.3787/j.issn.1000-0976.2022.08.007 ZHANG Jinchuan, LI Zhen, WANG Dongsheng, et al. Shale gas accumulation patterns in China[J]. Natural Gas Industry, 2022, 42(8): 78-95. doi: 10.3787/j.issn.1000-0976.2022.08.007
[4] 陈掌星，冯东，吴克柳，等. 页岩气有机质和无机质吸附能力定量表征[J]. 中国石油大学学报（自然科学版）， 2023， 47（5）： 65-75. doi： 10.3969/j.issn.1673-5005.2023.05.007 CHEN Zhangxing, FENG Dong, WU Keliu, et al. Quantificational determination of methane adsorption in organic matter and inorganic matter of shale rocks[J]. Journal of China University of Petroleum (Edition of Natural Science), 2023, 47(5): 65-75. doi: 10.3969/j.issn.1673-5005.2023.05.007
[5] ROUQUEROL J, AVNIR D, FAIRBRIDGE C W, et al. Recommendations for the characterization of porous solids (Technical Report)[J]. Pure & Applied Chemistry, 1994, 66(8): 1739-1785. doi: 10.1351/pac199466081739
[6] JARVIE D M, HILL R J, RUBBLE 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. doi: 10.1306/12190606068
[7] 邹才能，董大忠，王社教，等. 中国页岩气形成机理、地质特征及资源潜力[J]. 石油勘探与开发， 2010， 37（6）： 641-653. doi： 10.1016/S1876-3804（11）60001-3 ZOU Caineng, DONG Dazhong, WANG Shejiao, et al. Geological characteristics, formation mechanism and resource potential of shale gas in China[J]. Petroleum Exploration and Development, 2010, 37(6): 641-653. doi: 10.1016/S1876-3804(11)60001-3
[8] 刘鸿渊，蒲萧亦，张烈辉，等. 中国页岩气效益开发：理论逻辑、实践逻辑与展望[J]. 天然气工业， 2023， 43（4）： 177-183. doi： 10.3787/j.issn.1000-0976.2023.04.017 LIU Hongyuan, PU Xiaoyi, ZHANG Liehui, et al. Beneficial development of shale gas in China: Theoretical logic, practical logic and prospect[J]. Natural Gas Industry, 2023, 43(4): 177-183. doi: 10.3787/j.issn.1000-0976.2023.04.017
[9] 袁士义，雷征东，李军诗，等. 陆相页岩油开发技术进展及规模效益开发对策思考[J]. 中国石油大学学报（自然科学版）， 2023， 47（5）： 13-24. doi： 10.3969/j.issn.1673-5005.2023.05.002 YUAN Shiyi, LEI Zhengdong, LI Junshi, et al. Progress in technology for the development of continental shale oil and thoughts on the development of scale benefits and strategies[J]. Journal of China University of Petroleum (Edition of Natural Science), 2023, 47(5): 13-24. doi: 10.3969/j.issn.1673-5005.2023.05.002
[10] JIAO K, YAO S P, LIU C, et al. The characterization and quantitative analysis of nanopores in unconventional gas reservoirs utilizing FESEM-FIB and image processing: An example from the Lower Silurian Longmaxi Shale, Upper Yangtze Region, China[J]. International Journal of Coal Geology, 2014, 128: 1-11. doi: 10.1016/j.coal.2014.03.004
[11] WANG Yang, ZHU Yanming, CHEN Shangbin, et al. Characteristics of the nanoscale pore structure in northwestern Hunan shale gas reservoirs using field emission scanning electron microscopy, high-pressure mercury intrusion, and gas adsorption[J]. Energy & Fuels, 2014, 28: 945-955. doi: 10.1021/ef402159e
[12] KLAVER J, DESBOIS G, LITTKE R, et al. BIB-SEM characterization of pore space morphology and distribution in postmature to overmature samples from the Haynesville and Bossier Shales[J]. Marine and Petroleum Geology, 2015, 59: 451-466. doi: 10.1016/j.marpetgeo.2014.09.020
[13] YANG Feng, XU Shang, HAO Fang, et al. Petrophysical characteristics of shales with different lithofacies in Jiaoshiba area, Sichuan Basin, China: Implications for shale gas accumulation mechanism[J]. Marine and Petroleum Geology, 2019, 109: 394-407. doi: 10.1016/j.marpetgeo.2019.06.028
[14] 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. doi: 10.1016/j.marpetgeo.2008.06.004
[15] LOUCKS R G, REED R M, RUPPEL S C, et al. Morphology, genesis, and distribution of nanometer-scale pores in siliceous mud stones of the Mississippian Barnett Shale[J]. Journal of Sedimentary Research, 2009, 79(12): 848-861. doi: 10.2110/jsr.2009.092
[16] 武景淑，于炳松，张金川，等. 渝东南渝页1 井下志留统龙马溪组页岩孔隙特征及其主控因素[J]. 地学前缘， 2013， 20（3）： 260-269. WU Jingsong, YU Bingshu, ZHANG Jinchuan, et al. Pore characteristics and controlling factors in the organic-rich shale of the Lower Silurian Longmaxi Formation revealed by samples from a well in southeastern Chongqing[J]. Earth Science Frontiers, 2013, 20(3): 260-269.
[17] PENG N, HE S, HU Q H, et al. Organic nanopore structure and fractal characteristics of Wufeng and lower member of Longmaxi shales in southeastern Sichuan, China[J]. Marine and Petroleum Geology, 2019, 103: 456-472. doi: 10.1016/j.marpetgeo.2019.03.017
[18] LIU Z X, YAN D T, NIU X. Insights into pore structure and fractal characteristics of the Lower Cambrian Niutitang Formation shale on the Yangtze platform, South China[J]. Journal of Earth Science, 2020, 31(1): 169-180. doi: 10.1007/s12583-020-1259-0
[19] 徐旭辉，陆建林，王保华，等. 中国海相盆地油气资源动态评价与有利勘探方向[J]. 地学前缘， 2022， 29（6）： 73-83. doi： 10.13745/j.esf.sf.2022.8.21 XU Xuhui, LU Jianlin, WANG Baohua, et al. Marine basins in China: Petroleum resource dynamic evolution and exploration directions[J]. Earth Science Frontiers, 2022, 29(6): 73-83. doi: 10.13745/j.esf.sf.2022.8.21
[20] 魏国齐，杨威，杜金虎，等. 四川盆地震旦纪——早寒武世克拉通内裂陷地质特征[J]. 天然气工业， 2015， 35（1）： 24-35. doi： 10.3787/j.issn.1000-0976.2015.01.003 WEI Guoqi, YANG Wei, DU Jinhu, et al. Geological characteristics of the Sinian-Early Cambrian intracratonic rift, Sichuan Basin[J]. Natural Gas Industry, 2015, 35(1): 24-35. doi: 10.3787/j.issn.1000-0976.2015.01.003
[21] 刘宏，罗思聪，谭秀成，等. 四川盆地震旦系灯影组古岩溶地貌恢复及意义[J]. 石油勘探与开发， 2015， 42（3）： 283-293. doi： 10.11698/PED.2015.03.04 LIU Hong, LUO Sicong, TAN Xiucheng, et al. Restoration of paleokarst geomorphology of Sinian Dengying Formation in Sichuan Basin and its significance, SW China[J]. Petroleum Exploration and Development, 2015, 42(3): 283-293. doi: 10.11698/PED.2015.03.04
[22] 杜金虎，汪泽成，邹才能，等. 上扬子克拉通内裂陷的发现及对安岳特大型气田形成的控制作用[J]. 石油学报， 2016， 37（1）： 1-16. doi： 10.7623/syxb201601001 DU Jinhu, WANG Zecheng, ZOU Caineng, et al. Discovery of intra-cratonic rift in the Upper Yangtze and its coutrol effect on the formation of Anyue Giant Gas Field[J]. Acta Petrolei Sinica, 2016, 37(1): 1-16. doi: 10.7623/syxb201601001
[23] 钟勇，李亚林，张晓斌，等. 川中古隆起构造演化特征及其与早寒武世绵阳—长宁拉张槽的关系[J]. 成都理工大学学报（自然科学版）， 2014， 41（6）： 703-712. doi： 10.3969/j.issn.1671-9727.2014.06.05 ZHONG Yong, LI Yalin, ZHANG Xiaobin, et al. Evolution characteristics of central Sichuan palaeouplift and its relationship with Early Cambrian Mianyang-Changning intracratonic sag[J]. Journal of Chengdu University of Technology (Science & Technology Edition), 2014, 41(6): 703-712. doi: 10.3969/j.issn.1671-9727.2014.06.05
[24] 李忠权，刘记，李应，等. 四川盆地震旦系威远—安岳拉张侵蚀槽特征及形成演化[J]. 石油勘探与开发， 2015， 42（1）： 26-33. doi： 10.11698/PED.2015.01.03 LI Zhongquan, LIU Ji, LI Ying, et al. Formation and evolution of Weiyuan-Anyue extension-erosion groove in Sinian system, Sichuan Basin[J]. Petroleum Exploration and Development, 2015, 42(1): 26-33. doi: 10.11698/PED.2015.01.03
[25] 汪泽成，姜华，王铜山，等. 四川盆地桐湾期古地貌特征及成藏意义[J]. 石油勘探与开发， 2014， 41（3）： 305-312. doi： 10.11698/PED.2014.03.05 WANG Zecheng, JIANG Hua, WANG Tongshan, et al. Paleo-geomorphology formed during Tongwan tectonization in Sichuan Basin and its significance for hydrocarbon accumulation[J]. Petroleum Exploration and Development, 2014, 41(3): 305-312. doi: 10.11698/PED.2014.03.05
[26] 李宗银，姜华，汪泽成，等. 构造运动对四川盆地震旦系油气成藏的控制作用[J]. 天然气工业， 2014， 34（3）： 23-30. doi： 10.3787/j.issn.1000-0976.2014.03.004 LI Zongyin, JIANG Hua, WANG Zecheng, et al. Control of tectonic movement on hydrocarbon accumulation in the Sinian strata, Sichuan Basin[J]. Natural Gas Industry, 2014, 34(3): 23-30. doi: 10.3787/j.issn.1000-0976.2014.03.004
[27] 郭彤楼，熊亮，叶素娟，等. 输导层（体）非常规天然气勘探理论与实践——四川盆地新类型页岩气与致密砂岩气突破的启示[J]. 石油勘探与开发， 2023， 50（1）： 24-37. doi： 10.11698/PED.20220759 GUO Tonglou, XIONG Liang, YE Sujuan, et al. Theory and practice of unconventional gas exploration in carrier beds: Insight from the breakthrough of new type of shale gas and tight gas in Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2023, 50(1): 24-37. doi: 10.11698/PED.20220759
[28] 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 and Applied Chemistry, 2015, 87(9-10): 1051-1069. doi: 10.1515/ci-2016-0119
[29] SING K S W, EVERETT D H, HAUL R A W, et al. Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity[J]. International Union of Pure and Applied Chemistry, 1985, 57(4): 603-619. doi: 10.1351/pac198254112201
[30] 卢振东，刘成林，臧起彪，等. 高压压汞与核磁共振技术在致密储层孔隙结构分析中的应用：以鄂尔多斯盆地合水地区为例[J]. 地质科技通报， 2022， 41（3）： 300-310. doi： 10.19509/j.cnki.dzkq.2021.0256 LU Zhendong, LIU Chenglin, ZANG Qibiao, et al. Application of high pressure mercury injection and nuclear magnetic resonance in analysis of the pore structure of dense sandstone: A case study of the Heshui Area, Ordos Basin[J]. Bulletin of Geological Science and Technology, 2022, 41(3): 300-310. doi: 10.19509/j.cnki.dzkq.2021.0256
[31] BUSTIN R M, BUSTIN A M M, CUI A, et al. Impact of shale properties on pore structure and storage characteristics[C]. SPE 119892, 2008. doi: 10.2118/119892-MS
[32] 杨峰，宁正福，孔德涛，等. 高压压汞法和氮气吸附法分析页岩孔隙结构[J]. 天然气地球科学， 2013， 24（3）： 450-455. doi： 10.11764/j.issn.1672-1926.2013.03.450 YANG Feng, NING Zhengfu, KONG Detao, et al. Pore structure of shales from high pressure mercury injection and nitrogen adsorption method[J]. Natural Gas Geoscience, 2013, 24(3): 450-455. doi: 10.11764/j.issn.1672-1926.2013.03.450
[33] 龚小平，唐洪明，赵峰，等. 四川盆地龙马溪组页岩储层孔隙结构的定量表征[J]. 岩性油气藏， 2016， 28（3）： 48-57. doi： 10.3969/j.issn.1673-8926.2016.03.008 GONG Xiaoping, TANG Hongming, ZHAO Feng, et al. Quantitative characterization of pore structure in shale reservoir of Longmaxi Formation in Sichuan Basin[J]. Lithologic Reservoirs, 2016, 28(3): 48-57. doi: 10.3969/j.issn.1673-8926.2016.03.008
[34] CHALMERS G R L, BUSTIN R M. The organic matter distribution and methane capacity of the Lower Cretaceous strata of northeastern British Columbia, Canada[J]. International Journal of Coal Geology, 2007, 70: 223-239. doi: 10.1016/j.coal.2006.05.001
[35] CHEN J, XIAO X M. Evolution of nanoporosity in organic-rich shales during thermal maturation[J]. Fuel, 2014, 129(4): 173-181. doi: 10.1016/j.fuel.2014.03.058
[36] 王飞宇，关晶，冯伟平，等. 过成熟海相页岩孔隙度演化特征和游离气量[J]. 石油勘探与开发， 2013， 40（6）： 764-768. doi： 10.11698/PED.2013.06.19 WANG Feiyu, GUAN Jing, FENG Weiping, et al. Evolution of overmature marine shale porosity and implication to the free gas volume[J]. Petroleum Exploration and Development, 2013, 40(6): 764-768. doi: 10.11698/PED.2013.06.19
[37] MILLIKEN K L, RUDNICKI M, AWWILLE R D, et al. Organic matter-hosted pore system, Marcellus Formation (Devonian), Pennsylvnia[J]. AAPG Bulletin, 2013, 97(2): 177-200. doi: 10.1306/07231212048
[38] WANG Qingtao, LU Hong, WANG Taoli, et al. Pore characterization of Lower Silurian shale gas reservoirs in the Middle Yangtze Region, central China[J]. Marine and Petroleum Geology, 2018, 89: 14-26. doi: 10.1016/j.marpetgeo.2016.12.015
[39] WANG Qingtao, WANG Taoli, LIU Wenping, et al. Relationships among composition, porosity and permeability of Longmaxi shale reservoir in the Weiyuan Block, Sichuan Basin, China[J]. Marine and Petroleum Geology, 2019, 102: 33-47. doi: 10.1016/j.marpetgeo.2018.12.026
[40] 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. doi: 10.1306/08171111061