川东南地区五峰组-龙马溪组页岩气成藏条件分析

摘要

Objective:Upper Ordovician Wufeng Formation — Lower Silurian Longmaxi Formation s are important stratum for shale gas exploration in southeast Sichuan basin. Method:Shale gas reservoir-forming conditions are good in this area according to field geological investigation, well and logging data comparison,seismic data interpretation and test data analysis et.al. Results:Study area is located in deep-water shelf with large thickness of high quality shale (20 ~50 m). There are two thickness centers of Yibin—Luzhou and Shizhu—Jiannan from northeast to southwest.TOC content of shale is generally higher than 2.0%.Maturation is medium (2.0%