Статья

Influencing factors and quantitative prediction of gas content of deep marine shale in Luzhou block

Xinyang HeSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500, ChinaKun ZhangSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500, China. [email protected]Shu JiangKey Laboratory of Tectonics and Petroleum Resources (China University of Geosciences), Ministry of Education, Wuhan, 430074, ChinaZhenxue JiangState Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing, 102249, ChinaXueying WangSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500, ChinaWei JiangShale Gas Exploration and Development Project Department of CNPC Chuanqing Drilling Engineering Company Limited, Chengdu, 610051, ChinaJing LiInstitute of Geological Exploration and Development of CNPC Chuanqing Drilling Engineering Company Limited, Chengdu, 610051, ChinaYijia WuInstitute of Geological Exploration and Development of CNPC Chuanqing Drilling Engineering Company Limited, Chengdu, 610051, ChinaZhi GaoInstitute of Geological Exploration and Development of CNPC Chuanqing Drilling Engineering Company Limited, Chengdu, 610051, ChinaTian TangInstitute of Geological Exploration and Development of CNPC Chuanqing Drilling Engineering Company Limited, Chengdu, 610051, ChinaCheng YangInstitute of Geological Exploration and Development of CNPC Chuanqing Drilling Engineering Company Limited, Chengdu, 610051, ChinaXuejiao YuanSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500, ChinaFengli HanSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500, ChinaZeyun WangSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500, ChinaLaiting YeSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500, China

2025en

ABI

Аннотация

The exploration and development of deep marine shale gas has made significant breakthroughs, but factors influencing gas contents of deep marine shale are elusive, and quantitative prediction methods of gas content needs to be refined urgently. In this study, the deep marine shale of Longmaxi Formation in Luzhou area was taken as an example, vitrinite reflectance analysis, kerogen microscopy experiment, TOC content analysis, mineral composition analysis, gas content measurement, isothermal adsorption experiment, physical property analysis and argon ion polishing scanning electron microscopy experiment were carried out to find out factors affecting the gas content of deep marine shale, and a gas content prediction model has been worked out. Conclusions below have been reached: the content of adsorbed gas is mainly affected by Ro, TOC content, porosity, water saturation, clay mineral content, formation temperature and pressure; the content of free gas is mainly controlled by porosity, water saturation, formation temperature and pressure; according to the prediction models, the adsorbed gas content, free gas content and total gas content of each well were quantitatively calculated, and the study area was divided into Class I (with a total gas content ≥ 11 m 3 /t), Class II (with a total gas content between 9 m 3 /t and 11 m 3 /t), and Class III (with a total gas content < 9 m 3 /t) gas-bearing areas.

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Идентификаторы

DOI: 10.1038/s41598-025-86095-8

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