陆相页岩气储层特征与潜力评价

罗鹏，吉利明

doi:10.11764/j.issn.1672-1926.2013.05.1060

天然气地球科学 >

2013 , Vol. 24 >Issue 5: 1060 - 1068

DOI: https://doi.org/10.11764/j.issn.1672-1926.2013.05.1060

非常规天然气

陆相页岩气储层特征与潜力评价

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1.中国科学院地质与地球物理研究所油气资源研究重点实验室，甘肃兰州 730000；
2.中国科学院大学，北京 100049

罗鹏（1987-），男，湖南新化人，硕士研究生，主要从事油气地质与油气地球化学研究. E-mail：lxcyih@126.com.

收稿日期: 2012-11-11

修回日期: 2013-03-15

网络出版日期: 2013-10-10

基金资助

国家重点基础研究发展规划（“973”）项目 (编号:2012CB21470402);国家科技重大专项（编号:2011ZX05008-002-22）联合资助.

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Reservoir Characteristics and Potential Evaluation of Continental Shale Gas

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1.Key Laboratory of Oil and Gas Resources,Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China; 2.University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2012-11-11

Revised date: 2013-03-15

Online published: 2013-10-10

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摘要

在日益剧增的能源需求与北美页岩气成功开发的推动下，近年来我国页岩气勘查与潜力评价取得了一系列成果。我国广泛发育中生代以来的陆相沉积，各主要含油气盆地内陆相富有机质页岩极为丰富，评价其页岩气成藏潜力具有特殊的理论与现实意义。与海相页岩气储层不同，陆相富有机质页岩的热演化程度较低，有机质含量高；石英含量相对较低，而长石、碳酸盐矿物含量较高，总体脆性条件好；黏土矿物含量高，后期构造活动改造弱。这些特点决定了陆相气页岩储层评价的标准不能简单照搬海相储层的评价标准。在总结了目前我国主要陆相页岩气勘查评价成果的基础上，参照北美海相页岩气储层评价标准，认为陆相页岩气储层评价标准可定为：TOC＞2.0%，热成熟度RO＞0.9%，脆性矿物含量＞40%，黏土矿物含量＜40%，含气量＞1.0m³/t，孔隙度＞2%，有效厚度＞30m。

关键词： 陆相; 页岩气; 储层特征; 潜力评价

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罗鹏，吉利明 . 陆相页岩气储层特征与潜力评价[J]. 天然气地球科学, 2013 , 24(5) : 1060 -1068 . DOI: 10.11764/j.issn.1672-1926.2013.05.1060

Abstract

Promoted by the increasingly growing energy demand and successful shale-gas development in North America,China has also made a series of progresses in shale gas exploration and evaluation.Continental organic-rich shale occurs extensively in the major petroliferous basins of China since Mesozoic,discussion about shale-gas potential in the shale has special theoretic and practical significance.Comparing with marine shale,continental shale also has high organic carbon content,but has lower thermal evolution degree and quartz content,and higher feldspar and carbonate mineral content to ensure its favorable brittleness.Meanwhile,continental shale experienced much weaker tectonic transformation,thus has lower tectonic complexity.As a result,a special criterion should be established to evaluate the shale-gas potential of continental shale.On the base of careful summaries of current achievement in continental shale gas exploration and evaluation,and the shale gas evaluating criterion of marine shale in North America,the shale gas evaluating criterion for continental shale could be set as follows:TOC>2.0%,RO>0.9%,brittle minerals content >40%,clay content >40%,gas content >1.0m³/t,porosity >2%,and net thickness of organic-rich shale >30m.

Key words： Continental shale; Shale gas; Reservoir characteristic; Potential evaluation

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