川南—川东地区龙马溪组优质页岩分布及主控因素

doi:10.3969/j.issn.1006-6535.2024.04.007

特种油气藏 ›› 2024, Vol. 31 ›› Issue (4): 54-63.DOI: 10.3969/j.issn.1006-6535.2024.04.007

川南—川东地区龙马溪组优质页岩分布及主控因素

陈渝川¹, 林伟², 李明涛², 韩登林¹, 郭伟³

1.长江大学,湖北武汉 430100;
2.临沂大学,山东临沂 276000;
3.中国石油勘探开发研究院, 北京 100083

收稿日期:2023-10-05 修回日期:2024-04-26 出版日期:2024-08-25 发布日期:2024-09-20
通讯作者: 林伟(1991—),男,副教授,2015年毕业于中国地质大学(北京)石油工程专业,2020年毕业于中国科学院大学流体力学专业,获博士学位,现主要从事非常规油气开发地质学、提高采收率等方面的教学和科研工作。
作者简介:陈渝川(1998—),男,2021年毕业于防灾科技学院地质学专业,现为长江大学地质学专业在读硕士研究生,主要从事页岩气储层地质学方面的研究工作。
基金资助:
国家自然科学基金青年项目“海陆过渡相页岩复杂类型孔隙差异性结构刻画及赋气机理研究”(42202141)

The Distribution and Main Controlling Factors of High-quality Shale in Longmaxi Formation in Southern Sichuan-Eastern Sichuan Region

Chen Yuchuan¹, Lin Wei², Li Mingtao², Han Denglin¹, Guo Wei³

1. Yangtze University, Wuhan, Hubei 430100, China;
2. Linyi University, Linyi, Shandong 276000, China;
3. PetroChina Exploration and Development Research Institute, Beijing 100083, China

Received:2023-10-05 Revised:2024-04-26 Online:2024-08-25 Published:2024-09-20

摘要/Abstract

摘要： 四川盆地海相页岩气资源丰富,自古生代至新生代,盆地经历了多期构造运动,形成了复杂的构造样式和多变的沉积环境,导致页岩气资源分布不均。为厘清优质页岩的分布规律,以川南—川东地区龙马溪组页岩为例,开展了全岩X衍射、地球化学测试、盆地模拟、钻录井资料分析,从沉积、成藏、构造等角度对优质页岩的分布规律及主控因素进行了讨论并划分页岩气勘探开发有利区。研究表明:川南—川东地区优质页岩主要分布在半深水—深水陆棚相;R_o值为2.5%～3.5%时有利于发育优质页岩;褶皱构造对页岩气的富集和分布起到较为明显的控制作用。研究结果可为川南—川东地区的页岩探勘开发提供理论依据。

关键词: 页岩, 主控因素, 沉积环境, 储层分布, 龙马溪组, 川南—川东地区

Abstract: Sichuan Basin is rich in marine shale gas resources. From Paleozoic to Cenozoic, the basin has experienced multiple tectonic movements, forming complex structural styles and variable sedimentary environments, featuring with uneven distribution of shale gas resources. In order to clarify the distribution law of high-quality shale, taking the Longmaxi Formation shale in southern Sichuan-eastern Sichuan Region as an example, comprehensive analyses including whole-rock X-ray diffraction, geochemical testing, basin simulation, and drilling and logging data analysis were conducted. The distribution law and main controlling factors of high-quality shale were discussed from the perspectives of sedimentation, reservoir formation, and structure, and favorable areas for shale gas exploration and development were delineated. The results show that high-quality shale in the southern Sichuan-eastern Sichuan Region is mainly distributed in the semi-deepwater to deepwater continental shelf facies; an R_o value of 2.5% to 3.5% is conducive to the development of high-quality shale; and fold structures play a significant controlling role in the enrichment and distribution of shale gas. The research results can provide theoretical basis for shale exploration and development in southern Sichuan-eastern Sichuan Region.

Key words: shale, main controlling factors, sedimentary environment, reservoir distribution, Longmaxi Formation, southern Sichuan-eastern Sichuan Region

中图分类号:

TE122

陈渝川, 林伟, 李明涛, 韩登林, 郭伟. 川南—川东地区龙马溪组优质页岩分布及主控因素[J]. 特种油气藏, 2024, 31(4): 54-63.

Chen Yuchuan, Lin Wei, Li Mingtao, Han Denglin, Guo Wei. The Distribution and Main Controlling Factors of High-quality Shale in Longmaxi Formation in Southern Sichuan-Eastern Sichuan Region[J]. Special Oil & Gas Reservoirs, 2024, 31(4): 54-63.

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川南—川东地区龙马溪组优质页岩分布及主控因素

The Distribution and Main Controlling Factors of High-quality Shale in Longmaxi Formation in Southern Sichuan-Eastern Sichuan Region

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