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石油实验地质  2018, Vol. 40 Issue (1): 44-50    DOI: 10.11781/sysydz201801044
页岩气勘探开发 本期目录 | 过刊浏览 |
四川盆地涪陵地区五峰-龙马溪组页岩气层孔隙特征及对开发的启示
刘尧文1, 王进2, 张梦吟2, 蔡进2, 卢文涛2, 沈童2
1. 中国石化 江汉油田分公司, 湖北 潜江 433124;
2. 中国石化 江汉油田分公司 勘探开发研究院, 武汉 430223
Pore features of shale gas layer in Wufeng-Longmaxi formations in Fuling area of Sichuan Basin and the application to development
LIU Yaowen1, WANG Jin2, ZHANG Mengyin2, CAI Jin2, LU Wentao2, SHEN Tong2
1. SINOPEC Jianghan Oilfield Company, Qianjiang, Hubei 433124, China;
2. Research Institute of Petroleum Exploration and Development, SINOPEC Jianghan Oilfield Company, Wuhan, Hubei 430223, China
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摘要: 页岩孔隙特征是影响页岩含气性的重要因素。综合运用氩离子抛光扫描电镜、高压压汞、液氮吸附等技术,对涪陵地区五峰组-龙马溪组龙一段上部气层孔隙特征进行研究,对比上下部页岩孔隙发育特征的差异性。研究发现,下部气层有机碳含量高,孔隙类型以有机质孔为主,孔体积基本大于0.02 mL/g,BET比表面积基本大于20 m2/g;上部气层有机碳含量低,孔隙类型主要为微裂隙、黏土矿物孔,孔体积主要分布在0.016~0.02 mL/g,比表面积主要为12~20 m2/g。结合单井含气量测试结果,发现有机碳含量与含气量相关性最好,比表面积和孔隙度次之。以此为基础,开展上部气层含气性评价,认为⑧小层为上部气层含气性最佳层段,⑥和⑦小层次之,⑨小层最差。
关键词 孔隙特征页岩页岩气五峰-龙马溪组涪陵地区四川盆地    
Abstract:Shale porosity is an important factor affecting the gas-bearing capacity of shale. The pore characteristics of the upper gas layer from the Wufeng Formation to the first member of Longmaxi Formation were studied and compared with the lower gas layer by using argon plasma scanning electron microscopy (SEM), high pressure mercury intrusion and liquid nitrogen adsorption. Results show that the organic carbon content of the lower gas layer is high, the pores in the organic matter are dominant, the pore volume is mainly >0.02 mL/g, and the BET specific surface area is mainly >20 m2/g. The organic carbon content of the upper gas layer is low, the pores are mainly micro-fissures and clay mineral pores, the pore volume is mainly distributed from 0.016-0.02 mL/g, and the specific surface area is mainly 12-20 m2/g. Combined with a single well gas content test results, we found that organic carbon content has the best correlation with gas content, followed by specific surface area and porosity. An evaluation of the gas-bearing properties of the upper gas layer was carried out. Sub-layer ⑧ was considered as the best gas layer in the upper interval, while sub-layers ⑥ and ⑦ were the next best, and sub-layer ⑨ the worst.
Key wordspore characteristics    shale    shale gas    Wufeng-Longmaxi formations    Fuling area    Sichuan Basin
收稿日期: 2017-10-13      出版日期: 2018-01-28
ZTFLH:  TE122.2  
基金资助:国家科技重大专项(2016ZX05060)和中国石化科技项目(P17014-3)资助。
通讯作者: 王进(1986-),男,硕士,工程师,从事页岩气地质研究工作。E-mail:yyqdz2017@sina.com。     E-mail: yyqdz2017@sina.com
作者简介: 刘尧文(1967-),男,高级工程师,从事油气勘探开发与管理工作。E-mail:276176723@qq.com。
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引用本文:

刘尧文, 王进, 张梦吟,等 .四川盆地涪陵地区五峰-龙马溪组页岩气层孔隙特征及对开发的启示[J].石油实验地质,2018,40(1):44-50.
LIU Yaowen, WANG Jin, ZHANG Mengyin,et al .Pore features of shale gas layer in Wufeng-Longmaxi formations in Fuling area of Sichuan Basin and the application to development[J].Petroleum Geology & Experiment,2018,40(1):44-50.

链接本文:

http://www.sysydz.net/CN/10.11781/sysydz201801044      或      http://www.sysydz.net/CN/Y2018/V40/I1/44

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