渤海湾盆地济阳坳陷陆相页岩油吸附控制因素
Factors controlling lacustrine shale oil adsorption in the Jiyang Depression, Bohai Bay Basin
- 2022年43卷第3期 页码:489-498
收稿:2021-06-10,
修回:2022-03-10,
纸质出版:2022-06-01
DOI: 10.11743/ogg20220301
移动端阅览
收稿:2021-06-10,
修回:2022-03-10,
纸质出版:2022-06-01
移动端阅览
在页岩油勘探中,页岩吸附油量及其控制因素对于页岩油资源评价及有利区预测具有重要意义。以渤海湾盆地济阳坳陷沙河街组页岩为研究对象,通过改进的热解实验确定页岩吸附油量,利用分子模拟技术,微观吸附机理和宏观实验测试结果相结合,剖析了页岩物性、矿物组成和页岩油组分、有机质成熟度及温压等因素对吸附量的影响。结果表明:页岩孔隙体积高、总有机碳(
TOC
)含量高、饱和烃含量低、有机质成熟度低以及温度低的页岩储层,吸附油量大;
TOC
含量和有机质成熟度是中-低熟陆相页岩油吸附的主要控制因素。
It is of great significance to determining the amount of adsorbed oil and its control factors for the evaluation of shale oil resources and prediction of play fairway in shale oil exploration. The Shahejie shale in the Jiyang Depression is taken to determine the quantity of adsorbed shale oil by improved pyrolysis experiments. Meanwhile, the study reveals the factors influencing shale oil adsorption volume such as shale physical properties, shale compositions, shale oil components, as well as maturity of organic matters, temperature and pressure, etc., by an integration of molecular simulation technology, micro-adsorption mechanism and macro-experimental data. The results show that shale oil reservoirs featuring large pore volume, high
TOC
content, low saturated hydrocarbon content, low maturity, and low temperature, are of higher oil adsorption capacity, and
TOC
content and organic matter maturity are the main factors controlling oil adsorption of lacustrine shale oil reservoirs with low maturity.
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