石油勘探与开发 >

2021 , Vol. 48 >Issue 5: 916 - 927

DOI: https://doi.org/10.11698/PED.2021.05.04

油气勘探

渝西区块页岩气储集层微观孔-缝配置类型及其地质意义

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  • 1.西南石油大学地球与科学技术学院,成都610500;
    2.中国石油非常规重点实验室储层评价实验室,成都610500;
    3.页岩气资源与环境四川省协同创新中心,成都610500;
    4.中国石油勘探开发研究院,北京100083;
    5.德州大学阿灵顿分校地球与环境科学学院,美国德克萨斯96019;
    6.重庆页岩气勘探开发有限公司,重庆401120;
    7.中国石油西南油气田公司开发事业部,成都610051
付永红（1990-）,男,四川宜宾人,博士,西南石油大学助理研究员,主要从事非常规油气地质学方面研究。地址∶四川省成都市新都区,西南石油大学地球科学与技术学院,邮政编码∶610500。E-mail: fyh_swpu@163.com

收稿日期: 2021-02-06

  网络出版日期: 2021-09-17

基金资助

中国石油-西南石油大学创新联合体项目二课题一专题四“复杂地质条件下川南深层/昭通中浅层海相页岩气赋存机制及控制因素研究”（2020CX020104）; 高等学校学科创新引智计划（111计划）“深层海相页岩气高校开发学科创新引智基地”（D18016）; 页岩气资源与环境四川省协同创新中心“页岩不连通孔隙特征及其对勘探开发的影响”（SEC-2018-03）

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Microscopic pore-fracture configuration and gas-filled mechanism of shale reservoirs in the western Chongqing area, Sichuan Basin, China

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  • 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
    2. Reservoir Evaluation Laboratory of Unconventional Key Laboratory of CNPC, Chengdu 610500, China;
    3. Sichuan Collaborative Innovation Center for Shale Gas Resources and Environment, Chengdu 610500, China;
    4. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
    5. Department of Earth and Environmental Sciences, University of Texas at Arlington, Arlington, TX 76019, USA;
    6. Chongqing Shale Gas Exploration and Development Company Limited, Chongqing 401120, China;
    7. Development Division of PetroChina Southwest Oil and Gas Field Company, Chengdu 610051, China

Received date: 2021-02-06

  Online published: 2021-09-17

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摘要

以渝西区块上奥陶统五峰组—下志留统龙马溪组页岩储集层为研究对象,开展氩离子抛光扫描电镜及饱和不同润湿介质核磁共振实验,结合图像处理技术与现场解吸结果,分析微观孔-缝配置类型及其对页岩气赋存机制的影响。结果表明：①储集空间包括有机孔、无机孔和微裂缝,微裂缝发育特征的井间差异明显,有机孔发育程度与毗邻微裂缝的距离成反比,而无机孔则正好相反;②依据有机孔、微裂缝发育类型、程度及相互接触关系,将孔-缝配置类型划分为4类;③根据饱和油、水核磁T2谱差异构建并计算孔-缝配置的评价参数,其值越小,孔-缝配置越好;④孔-缝配置好的页岩储集层具有有机孔发育、孔隙度高、渗透率高、含气性高的特点,而孔-缝配置差的页岩则表现为微裂缝相对发育,增强了天然气输导能力,导致孔隙度和含气性偏低;⑤基于孔-缝配置类型,从有机质生烃、微裂缝提供运移通道的角度出发,建立3类页岩气微观赋存模式。图8表3参38

关键词： 页岩储集层; 微观孔-缝配置; 品质参数; 含气特征; 页岩气; 上奥陶统五峰组; 下志留统龙马溪组; 四川盆地

本文引用格式

付永红, 蒋裕强, 董大忠, 胡钦红, 雷治安, 彭浩, 谷一凡, 马韶光, 王子萌, 尹兴平, 王占磊 . 渝西区块页岩气储集层微观孔-缝配置类型及其地质意义[J]. 石油勘探与开发, 2021 , 48(5) : 916 -927 . DOI: 10.11698/PED.2021.05.04

Abstract

Taking the Upper Ordovician Wufeng Formation to Lower Silurian Longmaxi Formation shale reservoirs in western Chongqing area as the study target, the argon ion polishing scanning electron microscope and nuclear magnetic resonance (NMR) experiments of different saturated wetting media were carried out. Based on the image processing technology and the results of gas desorption, the pore-fracture configuration of the shale reservoirs and its influence on gas-filled mechanism were analyzed. (1) The reservoir space includes organic pores, inorganic pores and micro-fractures and there are obvious differences between wells in the development characteristics of micro-fractures; the organic pores adjacent to the micro-fractures are poorly developed, while the inorganic pores are well preserved. (2) According to the type, development degree and contact relationship of organic pore and micro-fracture, the pore-fracture configuration of the shale reservoir is divided into four types. (3) Based on the differences in NMR T2 spectra of shale samples saturated with oil and water, an evaluation parameter of pore-fracture configuration was constructed and calculated. The smaller the parameter, the better the pore-fracture configuration is. (4) The shale reservoir with good pore-fracture configuration has well-developed organic pores, high porosity, high permeability and high gas content, while the shale reservoir with poor pore-fracture configuration has micro-fractures developed, which improves the natural gas conductivity and leads to low porosity and gas content of the reservoir. (5) Based on pore-fracture configuration, from the perspective of organic matter generating hydrocarbon, micro-fracture providing migration channel, three types of micro gas-filled models of shale gas were established.

Key words： shale reservoir; microscopic pore-fracture configuration; quality parameter; gas bearing characteristics; shale gas; Upper Ordovician Wufeng Formation; Lower Silurian Longmaxi Formation; Sichuan Basin

参考文献

[1] 马新华, 谢军, 雍锐, 等. 四川盆地南部龙马溪组页岩气储集层地质特征及高产控制因素[J]. 石油勘探与开发, 2020, 47(5): 841-855.
MA Xinhua, XIE Jun, YONG Rui, et al. Geological characteristics and high production control factors of shale gas reservoir in Silurian Longmaxi Formation, southern Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2020, 47(5): 841-855.
[2] 马新华, 李熙喆, 梁峰, 等. 威远页岩气田单井产能主控因素与开发优化技术对策[J]. 石油勘探与开发, 2020, 47(3): 555-563.
MA Xinhua, LI Xizhe, LIANG Feng, et al. Dominating factors on well productivity and development strategies optimization in Weiyuan shale gas play, Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2020, 47(3): 555-563.
[3] 马新华, 谢军. 川南地区页岩气勘探开发进展及发展前景[J]. 石油勘探与开发, 2018, 45(1): 161-169.
MA Xinhua, XIE Jun. The progress and prospects of shale gas exploration and exploitation in southern Sichuan Basin, NW China[J]. Petroleum Exploration and Development, 2018, 45(1): 161-169.
[4] 邹才能, 赵群, 丛连铸, 等. 中国页岩气开发进展、潜力及前景[J]. 天然气工业, 2021, 41(1): 1-13.
ZOU Caineng, ZHAO Qun, CONG Lianzhu, et al. Development progress, potential and prospect of shale gas in China[J]. Natural Gas Industry, 2021, 41(1): 1-13.
[5] POMMER M, MILLIKEN K. Pore types and pore-size distributions across thermal maturity, Eagle Ford Formation, southern Texas[J]. AAPG Bulletin, 2015, 99(9): 1713-1744.
[6] CHALMERS G R, BUSTIN R M. A multidisciplinary approach in determining the maceral (kerogen type) and mineralogical composition of Upper Cretaceous Eagle Ford Formation: Impact on pore development and pore size distribution[J]. International Journal of Coal Geology, 2017, 171: 93-110.
[7] FU Yonghong, JIANG Yuqiang, WANG Zhanlei, et al. Non-connected pores of the Longmaxi shale in southern Sichuan Basin of China[J]. Marine and Petroleum Geology, 2019, 110: 420-433.
[8] HU Qinghong, EWING R P, DULTZ S, et al. Low pore connectivity in natural rock[J]. Journal of Contaminant Hydrology, 2012, 133: 76-83.
[9] 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.
[10] MILLIKEN K L, RUDNICKI M, AWWILLER D N, et al. Organic matter-hosted pore system, Marcellus formation (Devonian), Pennsylvania[J]. AAPG Bulletin, 2013, 97(2): 177-200.
[11] 王玉满, 李新景, 陈波, 等. 海相页岩有机质炭化的热成熟度下限及勘探风险[J]. 石油勘探与开发, 2018, 45(3): 385-395.
WANG Yuman, LI Xinjing, CHEN Bo, et al. Lower limit of thermal maturity foe the carbonization of organic matter in marine shale and its exploration risk[J]. Petroleum Exploration and Development, 2018, 45(3): 385-395.
[12] 杨威, 蔡剑锋, 王乾右, 等. 五峰—龙马溪组海相页岩生-储耦合演化及对页岩气富集的控制效应[J]. 石油科学通报, 2020, 5(2): 148-160.
YANG Wei, CAI Jianfeng, WANG Qianyou, et al. The controlling effect of organic matter coupling with organic matter porosity on shale gas enrichment of the Wufeng-Longmaxi marine shale[J]. Petroleum Science Bulletin, 2020, 5(2): 148-160.
[13] 郭旭升. 南方海相页岩气“二元富集”规律: 四川盆地及周缘龙马溪组页岩气勘探实践认识[J]. 地质学报, 2014, 88(7): 1209-1218.
GUO Xusheng. Rules of two-factor enrichiment for marine shale gas in southern China: Understanding from the Longmaxi Formation shale gas in Sichuan Basin and its surrounding area[J]. Acta Geologica Sinica, 2014, 88(7): 1209-1218.
[14] 徐浩. 南方海相页岩储层微观孔隙表征方法及含气特征分析[D]. 成都: 成都理工大学, 2019.
XU Hao. Micropores characterization method and gas content analysis for marine shale reservoirs in Southern China[D]. Chengdu: Chengdu University of Technology, 2019.
[15] 罗群, 王井伶, 罗家国, 等. “非常规油气缝-孔耦合富烃假说”概述[J]. 岩性油气藏, 2019, 31(4): 1-12.
LUO Qun, WANG Jingling, LUO Jiaguo, et al. Hypothesis outline of fracture-pore coupling enriching hydrocarbon on unconventional oil and gas[J]. Lithologic Reservoirs, 2019, 31(4): 1-12.
[16] 胡东风, 张汉荣, 倪楷, 等. 四川盆地东南缘海相页岩气保存条件及其主控因素[J]. 天然气工业, 2014, 34(6): 17-23.
HU Dongfeng, ZHANG Hanrong, NI Kai, et al. Main controlling factors for gas preservation conditions of marine shale in southeastern margins of the Sichuan Basin[J]. Natural Gas Industry, 2014, 34(6): 17-23.
[17] 刘宝珺, 许效松, 潘杏南, 等. 中国南方古大陆沉积地壳演化与成矿[M]. 北京: 科学出版社, 1993.
LIU Baojun, XU Xiaosong, PAN Xingnan, et al.The evolution and mineralization of sedimentary crust in the paleocontinent of southern China[M]. Beijing: Science Press, 1993.
[18] 张金川, 聂海宽, 徐波, 等. 四川盆地页岩气成藏地质条件[J]. 天然气工业, 2008, 28(2): 151-156.
ZHANG Jinchuan, NIE Haikuan, XU Bo, et al. Geological conditions of shale gas accumulation in Sichuan Basin[J]. Natural Gas Industry, 2008, 28(2): 151-156.
[19] 施振生, 邱振, 董大忠, 等. 四川盆地巫溪2井龙马溪组含气页岩细粒沉积纹层特征[J]. 石油勘探与开发, 2018, 45(2): 339-348.
SHI Zhensheng, QIU Zhen, DONG Dazhong, et al. Laminae characteristics of gas-bearing shale fine-grained sediment of the Silurian Longmaxi Formation of Well Wuxi 2 in Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2018, 45(2): 339-348.
[20] CURTIS J B. Fractured shale-gas systems[J]. AAPG Bulletin, 2002, 86(11): 1921-1938.
[21] AMBROSE R J, HARTMAN R C, DIAZ-CAMPOS M, et al. Shale gas-in-place calculations Part I: New pore-scale considerations[J]. SPE Journal, 2012, 17(1): 219-229.
[22] 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.
[23] MILLIKEN K L, RUDNICKI M, AWWILLER D N, et al. Organic matter-hosted pore system, Marcellus Formation (Devonian), Pennsylvania[J]. AAPG Bulletin, 2013, 97(2): 177-200.
[24] 于炳松. 页岩气储层孔隙分类与表征[J]. 地学前缘, 2013, 20(4): 211-220.
YU Bingsong. Classification and characterization of gas shale pore system[J]. Earth Science Frontiers, 2013, 20(4): 211-220.
[25] 高之业, 范毓鹏, 胡钦红, 等. 川南地区龙马溪组页岩有机质孔隙差异化发育特征及其对储集空间的影响[J]. 石油科学通报, 2020, 5(1): 1-16.
GAO Zhiye, FAN Yupeng, HU Qinhong, et al. Differential development characteristics of organic matter pores and their impact on reservoir space of Longmaxi Formation shale from the south Sichuan Basin[J]. Petroleum Science Bulletin, 2020, 5(1): 1-16.
[26] 王濡岳, 聂海宽, 胡宗全, 等. 压力演化对页岩气储层的控制作用: 以四川盆地五峰组—龙马溪组为例[J]. 天然气工业, 2020, 40(10): 1-10.
WANG Ruyue, NIE Haikuan, HU Zongquan, et al. Controlling effect of pressure evolution on shale gas reservoirs: A case study of the Wufeng-Longmaxi Formation in the Sichuan Basin[J]. Natural Gas Industry, 2020, 40(10): 1-10.
[27] 赵文智, 李建忠, 杨涛, 等. 中国南方海相页岩气成藏差异性比较与意义[J]. 石油勘探与开发, 2016, 43(4): 499-510.
ZHAO Wenzhi, LI Jianzhong, YANG Tao, et al. Geological difference and its significance of marine shale gases in south China[J]. Petroleum Exploration and Development, 2016, 43(4): 499-510.
[28] 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 Petroleum Geology, 2015, 59: 451-466.
[29] ODUSINA E, SONDERGELD C H, RAI C S. An NMR study on shale wettability[R]. SPE 147371, 2011.
[30] XU M, DEHGHANPOUR H. Advances in understanding wettability of gas shales[J]. Energy Fuels, 2014, 28: 4362-4375.
[31] MA Xinhua, WANG Hongyan, ZHOU Shangwen, et al. Insights into NMR response characteristics of shales and its application in shale gas reservoir evaluation[J]. Journal of Natural Gas Science and Engineering, 2020, 171: 84-93.
[32] SU Siyuan, JIANG Zhenxue, SHAN Xuanlong, et al. The wettability of shale by NMR measurements and its controlling factors[J]. Journal of Petroleum Science and Engineering, 2018, 169: 309-316.
[33] LIU XUAN, ZHANG Jinchuan, LIU Yang, et al. Main factors controlling the wettability of gas shales: A case study of over-mature marine shale in the Longmaxi Formation[J]. Journal of Natural Gas Science and Engineering, 2018, 169: 18-28.
[34] KLEWIAH I, BERAWALA D S, WALKER H, et al. Review of experimental sorption studies of CO2 and CH4 in shales[J]. Journal of Natural Gas Science and Engineering, 2020, 171: 73-84.
[35] FU Yonghong, JIANG Yuqiang, HU Qinhong, et al. Fracturing flowback fluids from shale gas wells in western chongqing: Geochemical analyses and relevance for exploration & development[J]. Journal of Natural Gas Science and Engineering, 2021, 172: 88-101.
[36] 李靖. 页岩赋存方式及产气机理研究[D]. 北京: 中国石油大学, 2017.
LI Jing. Storage characteristics and production mechanisms of shale gas reservoir[D]. Beijing: China University of Petroleum, 2017.
[37] 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.
[38] 郭旭升, 李宇平, 腾格尔, 等. 四川盆地五峰组—龙马溪组深水陆棚相页岩生储机理探讨[J]. 石油勘探与开发, 2020, 47(1): 193-201.
GUO Xusheng, LI Yuping, BORJIGEN Tenger, et al. Hydrocarbon generation and storage mechanisms of deep-water shelf shales of Ordovician Wufeng Formation-Silurian Longmaxi Formation in Sichuan Basin, China[J]. Petroleum Exploration and Development, 2020, 47(1): 193-201.
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