国家冰川冻土沙漠科学数据中心

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名称	Understanding pore evolution in a lacustrine calcareous shale reservoir in the oil window by pyrolyzing artificial samples in a semi-closed system
科技资源标识	CSTR:11738.14.NCDC.XDA14.PP4386.2024
DOI	10.1016/j.petrol.2020.108230
数据共享方式	开放下载
摘要	Calcareous shale is a favorable target for shale oil exploration, because shale oil moves more easily in calcareous shale than in clay-rich shale and the high carbonate content is beneficial to shale fracturing. Although shale oil exploration has been undertaken successfully in marine carbonate-rich shale (e.g., the Eagle Ford shale) in the USA, no major breakthrough has yet been made considering lacustrine calcareous shale. The lack of under- standing pore evolution in lacustrine calcareous shale increases exploration risk. Thus, an integrated analysis (Rock-Eval pyrolysis, X-ray diffraction (XRD1), low-pressure gas adsorption, field emission scanning electron microscopy (FE-SEM2), energy dispersive X-ray spectroscopy (EDS3), and helium pycnometry) of lacustrine calcareous shale from the Lucaogou Formation in the Santanghu Basin and of pyrolyzed shale was undertaken to document the hydrocarbon generation and expulsion, oil bearing capacity, and evolution of pores in the oil window. The thermal stress was calculated as the vitrinite reflectance equivalent (%Re4) based on the Easy%Ro method. The experimental results showed that the residual oil content and oil saturation index (OSI5) increased with increasing maturity at 0.6–1.29 %Re. The clogging of pores by generated oil and intense compaction caused a decrease in the volume of mesopores and macropores at 0.79–1.2 %Re, while abundant organic matter (OM6) pores formed due to hydrocarbon generation and expulsion at 1.29 %Re. Micron-scale dissolution pores and shrinkage OM pores contributed considerably to the total porosity, which improved the performance of the lacustrine calcareous shale reservoir at 1.0–1.29 %Re. Accordingly, the maturity range of 1.2–1.29 %Re is favorable for shale oil exploration in lacustrine calcareous shale due to the high OSI and the widely developed dissolution pores and shrinkage OM pores.
学科分类	170.50
关键词	Lacustrine calcareous shaleShale oilPore evolutionDissolution poresOil saturationLucaogou Formation
作者	Wang Taoli
数据量	23.6 MiB
论文类型：	journal
论文网址：	https://doi.org/10.1016/j.petrol.2020.108230
期刊名称：	Journal of Petroleum Science and Engineering
出版时间：	2021-05-01

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数据引用

Wang Taoli. Understanding pore evolution in a lacustrine calcareous shale reservoir in the oil window by pyrolyzing artificial samples in a semi-closed system. 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.PP4386.2024.

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。

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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）