川东南志留系龙马溪组页岩储层微孔隙结构及连通性研究

刘伟新; 鲍芳; 俞凌杰; 张文涛; 张庆珍; 卢龙飞; 范明

doi:10.11781/sysydz201604453

川东南志留系龙马溪组页岩储层微孔隙结构及连通性研究

doi: 10.11781/sysydz201604453

刘伟新^1,2,
鲍芳^1,2,
俞凌杰^1,2,
张文涛^1,2,
张庆珍^1,2,
卢龙飞^1,2,
范明^1,2

1.
中国石化石油勘探开发研究院无锡石油地质研究所, 江苏无锡 214126
2. 中国石化油气成藏重点实验室, 江苏无锡 214126

基金项目: 国家自然科学基金项目（41372130）和中国石化科技部项目（P13089）资助。

详细信息

作者简介:
刘伟新(1965—),男,博士,高级工程师,从事储盖实验测试与研究。E-mail:liuweixin.syky@sinopec.com。

中图分类号: TE122.2
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出版历程
- 收稿日期: 2016-02-17
- 修回日期: 2016-06-01
- 刊出日期: 2016-07-28

Micro-pore structure and connectivity of the Silurian Longmaxi shales, southeastern Sichuan area

1.
Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China
2. SINOPEC Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu 214126, China

摘要

摘要: 采用CT扫描、聚焦离子束扫描电镜、氩离子抛光—场发射扫描电镜、透射电镜等技术，对川东南志留系龙马溪组页岩进行了微孔隙结构及连通性分析，提出了4种页岩孔隙结构类型：（1）粒间微孔，存在于矿物颗粒之间，数量较少；（2）粒内微孔，分布于粒间分散有机质中及与球状黄铁矿共生的有机质中，少量见于黏土片间的微孔隙；（3）粒缘隙，存在于分散有机质颗粒及矿物颗粒周缘；（4）层（页）理缝，基本平行于页岩沉积层理较大的微裂隙。有机质纳米孔隙呈蜂窝状，呈正态分布，互相连通，孔隙直径主要在30~90 nm之间；孔隙喉道呈单曲线形，喉道宽度主要在7~20 nm之间；层（页）理缝约占页岩孔隙体积的1%~2%，是页岩的优势渗滤通道。微孔隙主要分布于有机质中，是页岩气的主要储集空间，粒缘隙形成页岩连通网络，层（页）理缝为页岩的主要渗滤通道，提出"纳米孔储集、粒缘隙连通、页理缝渗滤"的页岩气连通与流动模式。
- 孔隙结构 /
- 储集空间 /
- 渗滤通道 /
- 页岩 /
- 龙马溪组 /
- 志留系 /
- 川东南
Abstract: Micro-pore structure and connectivity of the Silurian Longmaxi shales in the southeastern Sichuan Basin were studied using CT, FIB-SEM, Ar⁺-SEM, and TEM techniques. Four modes for micro-pores in shales were determined to be as follows. (1) Intergranular micro-pores which exist between mineral grains and account for a small proportion of the total. (2) Intragranular micro-pores which mainly exist in intergranular dispersed organic matter or symbiosis organic matter with globular pyrite, and some between clay layers. (3) Grain boundary fractures which exist around organic or mineral grains, and work as a connective network for the shales. (4) Interlayer bedding which provides filtration channels. Intraparticle organic nano-pores are bubble like, show a normal size distribution, and are connected to each other. Their diameter mainly ranges from 30-90 nm and throat width ranges from 7-20 nm. Interlayer bedding accounts for 1%-2% of total shale pores and fractures, and are favorable filtration channels. Micro-pores and fractures in organic matter provide the main reservoir space for shale gas, grain boundary fractures form a connective network, while interlayer bedding provides filtration channels.
- pore structure /
- connectivity /
- reservoir space /
- filtration channel /
- shales in Longmaxi Formation /
- southeastern Sichuan Basin /

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参考文献(27)

[1]	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. 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.
[2]	Loucks R G,Reed R M,Ruppel S C,et al.Morphology,genesis,and distribution of nanometer-scale pores in siliceous mudstones of the Mississippian Barnett shale[J].Journal of Sedimentary Research,2009,79(12):848-861.
[3]	Sondergeld C H,Ambrose R J,Rai C S,et al.Microstructural studies of gas shale//Society of Petroleum Engineers Unconventional Gas Conference.Pittsburgh,Pennsylvania,USA:Society of Petroleum Engineers,2010:1-17.
[4]	Slatt R M,O'Neal N R.Pore types in the Barnett and Woodford gas shale:Contribution to understanding gas storage and migration pathways in fine-grained rocks[J].AAPG Bulletin,2011,95(12):2017-2030.
[5]	Milner M,McLin R,Petriello J.Imaging texture and porosity in mudstones and shales:Comparison of secondary and ion-milled backscatter SEM methods//Canadian Unconventional Resources and International Petroleum Conference.Calgary,Alberta,Canada:Society of Petroleum Engineers,2010:1-10.
[6]	Gale J F W,Holder J.Natural fractures in some U.S. shales and their importance for gas production//Proceedings of the 7th Petroleum Geology Conference Series 2010. London :Geological Society of London,2010:1131-1140.
[7]	Slatt R M,Abousleiman Y.Merging sequence stratigraphy and geomechanics for unconventional gas shales[J].The Leading Edge,2011,30(3):274-282.
[8]	Aringhieri R.Nanoporosity characteristics of some natural clay minerals and soils[J].Clays and Clay Minerals,2004,52(6):700-704.
[9]	Clarkson C R,Jensen J L,Pedersen P K,et al.Innovative methods for flow-unit and pore-structure analyses in a tight siltstone and shale gas reservoir[J].AAPG Bulletin,2012,96(2):355-374.
[10]	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 units[J].AAPG Bulletin,2012,96(6):1099-1119.
[11]	Curtis M E,Ambrose R J,Sondergeld C H,et al.Transmission and scanning electron microscopy investigation of pore connectivity of gas shales on the nanoscale//North American Unconventional Gas Conference and Exhibition.Woodlands,Texas,USA:Society of Petroleum Engineers,2011.
[12]	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.
[13]	Klaver J,Desbois G,Urai J L,et al.BIB-SEM study of the pore space morphology in early mature Posidonia Shale from the Hils area,Germany[J].International Journal of Coal Geology,2012,103:12-25.
[14]	王志刚.涪陵焦石坝地区页岩气水平井压裂改造实践与认识[J].石油与天然气地质,2014,35(3):425-430. Wang Zhigang.Practice and cognition of shale gas horizontal well fracturing stimulation in Jiaoshiba of Fuling area[J].Oil & Gas Geology,2014,35(3):425-430.
[15]	肖贤明,宋之光,朱炎铭,等.北美页岩气研究及对我国下古生界页岩气开发的启示[J].煤炭学报,2013,38(5):721-728. Xiao Xianming,Song Zhiguang,Zhu Yanming,et al.Summary of shale gas research in North American and revelations to shale gas exploration of Lower Paleozoic strata in China south area[J].Journal of China Coal Society,2013,38(5):721-728.
[16]	曾祥亮,刘树根,黄文明,等.四川盆地志留系龙马溪组页岩与美国Fort Worth盆地石炭系Barnett组页岩地质特征对比[J].地质通报,2011,30(2/3):372-384. Zeng Xiangliang,Liu Shugen,Huang Wenming,et al.Comparison of Silurian Longmaxi Formation shale of Sichuan Basin in China and Carboniferous Barnett Formation shale of Fort Worth Basin in United States[J].Geologcal Bulletin of China,2011,30(2/3):372-384.
[17]	韩双彪,张金川,Horsfield B,等.页岩气储层孔隙类型及特征研究:以渝东南下古生界为例[J].地学前缘,2013,20(3):247-253. Han Shuangbiao,Zhang Jinchuan,Horsfield B,et al.Pore types and characteristics of shale gas reservoir:A case study of lower Paleozoic shale in southeast Chongqing[J].Earth Science Frontiers,2013,20(3):247-253.
[18]	聂海宽,张金川.页岩气储层类型和特征研究:以四川盆地及其周缘下古生界为例[J].石油实验地质,2011,33(3):219-225. Nie Haikuan,Zhang Jinchuan.Types and characteristics of shale gas reservoir:A case study of Lower Paleozoic in and around Sichuan Basin[J].Petroleum Geology & Experiment,2011,33(3):219-225.
[19]	孙梦迪,于炳松,李娟,等.渝东南地区龙马溪组页岩储层特征与主控因素[J].特种油气藏,2014,21(4):63-66. Sun Mengdi,Yu Bingsong,Li Juan,et al.Features and Major Controlling Factors of Longmaxi Shale Reservoir in Southeastern Chongqing[J].Special Oil & Gas Reservoirs,2014,21(4):63-66.
[20]	马勇,钟宁宁,程礼军,等.渝东南两套富有机质页岩的孔隙结构特征:来自FIB-SEM的新启示[J].石油实验地质,2015,37(1):109-116. Ma Yong,Zhong Ningning,Cheng Lijun,et al.Pore structure of two organic-rich shales in southeastern Chongqing area: Insight from Focused Ion Beam Scanning Electron Microscope (FIB-SEM)[J].Petroleum Geology & Experiment,2015,37(1):109-116.
[21]	赵可英,郭少斌.海陆过渡相页岩气储层孔隙特征及主控因素分析:以鄂尔多斯盆地上古生界为例[J].石油实验地质,2015,37(2):141-149. Zhao Keying,Guo Shaobin.Characteristics and main controlling factors of shale gas reservoirs in transitional facies: A case study of Upper Paleozoic in Ordos Basin[J].Petroleum Geology & Experiment,2015,37(2):141-149.
[22]	蒲泊伶,董大忠,牛嘉玉,等.页岩气储层研究新进展[J].地质科技情报,2014,33(2):98-104. Pu Boling,Dong Dazhong,Niu Jiayu,et al.Principal progresses in shale gas reservoir research[J].Geological Science and Technology Information,2014,33(2):98-104.
[23]	邹才能,朱如凯,白斌,等.中国油气储层中纳米孔首次发现及其科学价值[J].岩石学报,2011,27(6):1857-1864. Zou Caineng,Zhu Rukai,Bai Bin,et al.First discovery of nano-pore throat in oil and gas reservoir in China and its scientific value[J].Acta Petrologica Sinica,27(6):1857-1864.
[24]	张盼盼,刘小平,王雅杰,等.页岩纳米孔隙研究新进展[J].地球科学进展,2014,29(11):1242-1249. Zhang Panpan,Liu Xiaoping,Wang Yajie,et al.Research progress in shale nanopores[J].Advances in Earth Science,2014,29(11):1242-1249.
[25]	张月,文慧俭,白东来,等.松辽盆地大安油田纳米级孔隙研究[J].断块油气田,2015,22(4):440-444. Zhang Yue,Wen Huijian,Bai Donglai,et al.Study on nanopore throat in Da'an Oilfield,Songliao Basin[J].Fault-Block Oil and Gas Field,2015,22(4):440-444.
[26]	焦堃,姚素平,吴浩,等.页岩气储层孔隙系统表征方法研究进展[J].高校地质学报,2014,20(1):151-161. Jiao Kun,Yao Suping,Wu Hao,et al.Advances in characterization of pore system of gas shales[J].Geological Journal of China Universities,2014,20(1):151-161.
[27]	杨峰,宁正福,胡昌蓬,等.页岩储层微观孔隙结构特征[J].石油学报,2013,34(2):300-310. Yang Feng,Ning Zhengfu,Hu Changpeng,et al.Characterization of microscopic pore structures in shale reservoirs[J].Acta Petrolei Sinica,2013,34(2):300-310.