国家冰川冻土沙漠科学数据中心

元数据

名称	Lower limit of thermal maturity for the carbonization of organic matter in marine shale and its exploration risk
科技资源标识	CSTR:11738.14.NCDC.XDA14.PP4334.2024
DOI	https://doi.org/10.1016/S1876-3804(18)30045-4
数据共享方式	开放下载
摘要	Based on the drilling data of the Silurian Longmaxi Formation in the Sichuan Basin and periphery, SW China, the Ro lower limits and essential features of the carbonization of organic matter in over-high maturity marine shale were examined using laser Raman, electrical and physical property characterization techniques. Three preliminary conclusions are drawn: (1) The lower limit of Ro for the carbonization of Type I-II1 organic matter in marine shale is 3.5%; when the Ro is less than 3.4%, carbonization of organic matter won’t happen in general; when the Ro ranges from 3.4% to 3.5%, non-carbonization and weak carbonization of organic matter may coexist; when the Ro is higher than 3.5%, the carbonization of organic matter is highly likely to take place. (2) Organic-rich shale entering carbonization phase have three basic characteristics: log resistivity curve showing a general “slender neck” with low-ultralow resistance response, Raman spectra showing a higher graphite peak, and poor physical property (with matrix porosity of only less than 1/2 of the normal level). (3) The quality damage of shale reservoir caused by the carbonization of organic matter is almost fatal, which primarily manifests in depletion of hydrocarbon generation capacity, reduction or disappearance of organic pores and intercrystalline pores of clay minerals, and drop of adsorption capacity to natural gas. Therefore, the lower limit of Ro for the carbonization of Type I-II1 organic matter should be regarded as the theoretically impassable red line of shale gas exploration in the ancient marine shale formations. The organic- rich shale with low-ultralow resistance should be evaluated effectively in area selection to exclude the high risk areas caused by the carbonization of organic matter. The target organic-rich shale layers with low-ultralow resistance drilled during exploration and development should be evaluated on carbonization level of organic matter, and the deployment plan should be adjusted according to the evaluation results in time.
学科分类	170.50
关键词	Lower Silurian Longmaxi Formation marine shale thermal maturity organic matter carbonization resistivity logging explorationrisk
作者	WANG Yuman,LI Xinjing,CHEN Bo,WU Wei,DONG Dazhong,ZHANG Jian,HAN Jing,MA Jie,DAI Bing,WANG Hao,JIANG Shan
数据量	2.3 MiB
论文类型：	journal
论文网址：	https://www.sciencedirect.com/science/article/pii/S1876380418300454
期刊名称：	Petroleum Exploration and Development
出版时间：	2018-06-01

引用和标注

数据引用

WANG Yuman,LI Xinjing,CHEN Bo,WU Wei,DONG Dazhong,ZHANG Jian,HAN Jing,MA Jie,DAI Bing,WANG Hao,JIANG Shan. Lower limit of thermal maturity for the carbonization of organic matter in marine shale and its exploration risk. 国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn), 2024. https://cstr.cn/CSTR:11738.14.NCDC.XDA14.PP4334.2024.

许可协议

本作品采用知识共享署名 4.0 国际许可协议进行许可。

扫码后在手机端浏览

项目信息详情

项目名称：深层油气形成与分布预测
项目编号：XDA14010000
项目类别：中国科学院战略性先导科技专项（A类）