四川盆地及其周缘页岩气富集条件研究进展
Progress in the Study of Shale Gas Enrichment Conditions in the Sichuan Basin and its Periphery
周丹 1范存辉1
作者信息
- 1. 西南石油大学地球科学技术学院,四川成都 610500
- 折叠
摘要
对四川盆地及其周缘页岩气的富集条件研究进展进行了系统总结.研究结果表明,龙马溪组一段一亚段富有机质页岩,总有机碳含量平均为3.6%,硅质矿物平均含量49.0%,生烃潜力大;深水陆棚较浅水陆棚而言古环境更为还原古生产力更强,更有利于页岩气富集和保存;沉积厚度受裂陷槽控制明显;同时构造运动和保存条件影响着页岩气的赋存状态,盆地内部以游离气为主,盆地以吸附态为主,五峰组—龙马溪组是主力勘探层.
Abstract
A systematic summary of the research progress on the enrichment conditions of shale gas in the Sichuan Basin and its surrounding areas has been conducted.The research results show that the first and second sections of the Longmaxi Formation are rich in organic shale,with an average total organic carbon content of 3.6%and an average content of 49.0% in siliceous minerals,indicating great potential for hydrocarbon generation;Compared to shallow water shelves,deep-water shelves have a more restored paleoproductivity and are more conducive to the enrichment and preservation of shale gas;The sedimentary thickness is significantly controlled by the rift trough;At the same time,the tectonic movement and preservation conditions affect the occurrence status of shale gas.The interior of the basin is mainly composed of free gas,while the basin is mainly in an adsorbed state;The Longmaxi Formation of the Wufeng Formation is the main exploration layer.
关键词
页岩气/有机质/孔隙度Key words
shale gas/organic matter/porosity引用本文复制引用
出版年
2024
NETL
NSTL
万方数据