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石油实验地质  2019, Vol. 41 Issue (1): 76-82    DOI: 10.11781/sysydz201901076
页岩气勘探开发实践与理论 本期目录 | 过刊浏览 |
鄂西宜昌斜坡区寒武系页岩储层发育特征——以鄂宜页1井为例
李海, 刘安, 罗胜元, 陈孝红, 陈林
中国地质调查局 武汉地质调查中心, 武汉 430205
Characteristics of the Cambrian Shuijingtuo shale reservoir on Yichang Slope, western Hubei Province: a case study of well EYY 1
LI Hai, LIU An, LUO Shengyuan, CHEN Xiaohong, CHEN Lin
Wuhan Center of Geology Survey, China Geological Survey, Wuhan, Hubei 430205, China
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摘要: 以获得重大突破的鄂宜页1井为研究对象,对寒武系水井沱组黑色页岩进行了有机地球化学、矿物X射线衍射、场发射扫描电镜及核磁共振分析等测试,研究了鄂西宜昌斜坡区页岩储层的发育特征。该区页岩主要由黏土矿物、石英和碳酸盐矿物组成,由浅至深表现出黏土矿物和碳酸盐矿物逐渐减少、石英含量逐渐增加的趋势,总体上显示出"高钙低硅"特征;页岩的孔隙度与有机碳含量表现出正相关性,尤其有机碳含量大于2.0%的层段,页岩孔隙度随有机碳升高而增大明显;页岩孔隙以微孔和小孔为主,小孔和中孔对孔隙度贡献明显;页岩中脆性矿物内的孔隙对页岩基质孔隙的贡献稳定,而有机质孔和黏土矿物层间孔隙的贡献与其各自含量变化相关,随深度的增加有机质孔贡献逐渐升高,而黏土矿物层间孔隙贡献逐渐降低。
关键词 储层特征页岩气水井沱组寒武系宜昌斜坡区鄂西    
Abstract:The characteristics of shale reservoirs on the Yichang Slope in the western Hubei Province were studied using organic geochemistry, mineral X-ray diffraction, field emission scanning electron microscopy and nuclear magnetic resonance methods on black shale samples collected from the Cambrian Shuijingtuo Formation in the well EYY 1. Shale in the study area is mainly composed of quartz, clay minerals and carbonates with high calcium and low siliceous contents. From bottom to top, the contents of clay minerals and carbonates gradually decrease, while the content of quartz gradually increases. Shale porosity has a positive relationship with TOC content, especially in the section with a TOC content higher than 2%. Micro pores and small pores are abundant in the shale. Small pores and meso pores contribute significantly to porosity. The contribution of pores in brittle minerals to the matrix porosity of shale is stable, while the contribution of organic pores and interlayer pores in clay minerals are respectively changing relative to their contents, which means that the contribution of organic pores increases with depth and pores in clay minerals decrease gradually.
Key wordsreservoir characteristics    shale gas    Shuijingtuo Formation    Cambrian    Yichang Slope    western Hubei Province
收稿日期: 2018-09-19      出版日期: 2019-01-26
ZTFLH:  TE122.23  
基金资助:国家科技重大专项“中扬子高演化页岩气赋存机理与富集规律研究”(2016ZX05034001-002)和中国地质调查局项目(DD20179615)资助。
作者简介: 李海(1988-),男,硕士,工程师,从事页岩气资源调查评价研究。E-mail:lihai6248592@163.com。
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引用本文:

李海, 刘安, 罗胜元,等 .鄂西宜昌斜坡区寒武系页岩储层发育特征——以鄂宜页1井为例[J].石油实验地质,2019,41(1):76-82.
LI Hai, LIU An, LUO Shengyuan,et al .Characteristics of the Cambrian Shuijingtuo shale reservoir on Yichang Slope, western Hubei Province: a case study of well EYY 1[J].Petroleum Geology & Experiment,2019,41(1):76-82.

链接本文:

http://www.sysydz.net/CN/10.11781/sysydz201901076      或      http://www.sysydz.net/CN/Y2019/V41/I1/76

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