昭通示范区龙马溪组页岩气高产储层微观孔隙结构定量表征

新疆石油天然气 ›› 2021, Vol. 17 ›› Issue (3): 7-16.

昭通示范区龙马溪组页岩气高产储层微观孔隙结构定量表征

谢庆宾^1,2, 王佳¹, 宋姝豫¹, 朱毅秀¹, 王宇涵¹, 张介辉³

1.中国石油大学（北京）地球科学学院,北京 102249;
2.中国石油大学（北京）克拉玛依校区,新疆克拉玛依 834000;
3.中国石油天然气股份有限公司浙江油田分公司,浙江杭州 310023

出版日期:2021-09-10 发布日期:2021-09-10
作者简介:谢庆宾（1966-）,1990年毕业于中国石油大学（华东）石油地质专业,教授,主要从事沉积储层方面的研究工作。（Tel）13501246979（E-mail）xieqingbin@cup.edu.cn
基金资助:
国家重大科技专项“昭通页岩气勘探开发示范工程”（2016ZX05063002-006）; 中国石油大学（北京）克拉玛依校区科研启动基金

Quantitative Characterization of Microscopic Pore Structures for the High-Yielding Shale Gas Reservoir of Longmaxi Formation in Zhaotong Demonstration Zone

XIE Qingbin^1,2, WANG Jia¹, SONG Shuyu¹, ZHU Yixiu¹, WANG Yuhan¹, ZHANG Jiehui³

1. School of Geoscience,China University of Petroleum (Beijing),Changping 102249,Beijing,China;
2. Karamay Campus,China University of Petroleum (Beijing),Karamay 834000,Xinjiang,China;
3. PetroChina Zhejiang Oilfield Company,Hangzhou 310023,Zhejiang,China

Online:2021-09-10 Published:2021-09-10

摘要/Abstract

摘要： 以昭通示范区龙马溪组页岩气高产储层为研究对象,通过场发射扫描电镜,氮气吸附实验,XRD衍射,核磁共振实验,纳米CT扫描技术和Image J图像处理软件,对页岩气高产储层微观孔隙结构进行定量表征。研究结果表明,页岩气高产储层的岩石类型以富含有机质的灰黑—黑色页岩为主,孔隙度大于2%,渗透率大于0.01×10^-3 μm²,孔隙类型以有机质孔为主,孔隙连通性好,其次为粒间孔,粒内孔和少量微裂缝,孔隙半径分布在5~50 nm之间,三类孔隙结构在孔隙类型,TOC含量和孔径分布方面各有差异,其中Ⅰ类孔隙结构主要为机质孔,TOC含量高,储层质量好。Ⅱ类孔隙有机质含量中等,主要是由有机质和黏土矿物提供的微孔-介孔构成;Ⅲ类孔隙有机质含量低,主要是由黏土矿物提供的部分微孔和介孔构成。

关键词: 昭通示范区, 龙马溪组, 页岩气高产储层, 孔隙结构

Abstract: In this study,the high-yielding shale gas reservoir of Longmaxi Formation in Zhaotong Demonstration Zone is addressed. The microscopic pore structures of high-yielding shale gas reservoir were quantitatively characterized by field emission scanning electron microscopy,nitrogen adsorption experiment,X-ray diffraction (XRD),nuclear magnetic resonance experiment,nano-CT scanning technology and Image J image processing software. The study findings show that the rocks of shale gas reservoir mainly consist of greyish black - black shale rich in organic matters and with a porosity greater than 2% and a permeability greater than 0.01 ×10^-3 μm². Most of the pores are organic ones with good connectivity,and there are also some intergranular and intragranular pores,as well as a small number of micro-cracks. The pore size is in the range of 5~50 nm. The three types of pore structures are different in pore type,total organic content (TOC) and pore size. Type I pores are mainly organic ones,with high TOC and good reservoir quality. Type II pores have moderate organic content,which are mainly composed of micropores-mesopores provided by organic matters and clay minerals. Type III pores have low organic content,which are mainly composed of some micropores and mesopores provided by clay minerals.

Key words: Zhaotong Demonstration Zone, Longmaxi Formation, high-yielding shale gas reservoir, pore structure

中图分类号:

TE348

谢庆宾, 王佳, 宋姝豫, 朱毅秀, 王宇涵, 张介辉. 昭通示范区龙马溪组页岩气高产储层微观孔隙结构定量表征[J]. 新疆石油天然气, 2021, 17(3): 7-16.

XIE Qingbin, WANG Jia, SONG Shuyu, ZHU Yixiu, WANG Yuhan, ZHANG Jiehui. Quantitative Characterization of Microscopic Pore Structures for the High-Yielding Shale Gas Reservoir of Longmaxi Formation in Zhaotong Demonstration Zone[J]. Xinjiang Oil & Gas, 2021, 17(3): 7-16.

参考文献

[1] DANIEL J K,ROSS R,MARC B.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.
[2] 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.
[3] 侯宇光,何生,易积正,等.页岩孔隙结构对甲烷吸附能力的影响[J].石油勘探与开发,2014,41(2):248-256.
[4] CLARKSON C R,SOLANO N R,BUSTIN R M,et al.Pore structure characterization of North American shale gas reservoirs using USANS/SANS,gas adsorption,and mercury intrusion[J]. Fuel,2013,103:606-616.
[5] 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.
[6] 梁兴,张廷山,杨洋,等.滇黔北地区筇竹寺组高演化页岩气储层微观孔隙特征及其控制因素[J].天然气工业,2014,34(2):18-26.
[7] 张金川,薛会,张德明,等.页岩气及其成藏机理[J].现代地质,2003,17(4):46.
[8] 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.
[9] 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,2004,14(7):15-18.
[10] 王鹏万,张磊,李昌,等.黑色页岩氧化还原条件与有机质富集机制—以昭通页岩气示范区A井五峰组–龙马溪组下段为例[J].石油天然气地质,2017,38(5):933-943.
[11] 李双建,肖开华,沃玉进,等.中上扬子地区上奥陶统–志留统烃源岩发育的古环境恢复[J].岩石矿物学杂志,2009,28(5):873-880.
[12] 肖开华,李双建,汪新伟,等.中上扬子区志留系油气成藏特点与勘探前景[J].石油与天然气地质,2008,29(5):589-596.
[13] 舒兵,张廷山,梁兴,等.滇黔北坳陷及邻区下志留统龙马溪组页岩气储层特征[J].海相油气地质,2016,21(03):22-28.
[14] SY/T5163-2018.沉积岩中黏土矿物和常见非黏土矿物X射线衍射分析方法[S].
[15] 陈科洛,张廷山,梁兴,等.滇黔北坳陷五峰组—龙马溪组下段页岩岩相与沉积环境[J].沉积学报,2018,36(04):743-755.
[16] 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.
[17] 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):1 071-1 098.
[18] ROUQUEROL F,ROUQUEROL J,SING K S W. Adsorption by powers and porous solids:principles,methodology and applications[M]. London:Academic Press,1999.
[19] 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.
[20] 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.
[21] SY/T6490-2014.岩样核磁共振参数实验室测量规范[S].
[22] SINGH P,SLATT R M,BORGES G,et al.Reservoir characterization of unconventional gas shale reservoirs:example from the Barnett Shale,Texas,U.S.A[J]. Oklahoma City Geological Society Shale Shaker,2009,60(1):15-31.
[23] 王为民,郭和坤,叶朝辉.利用核磁共振可动流体评价低渗透油田开发潜力[J].石油学报,2001,22(6):40-44.