所属单位：

地球科学学院

发表刊物：

FRESENIUS ENVIRONMENTAL BULLETIN

摘要：

In order to further evaluate the geological sweet spot area of shale gas in complex tectonic area, and realize the exploration breakthrough of shale gas in China. By means of field survey, numerical simulation and scanning electron microscope analysis, the shale lithofacies distribution and tectonic control are further studied. In which, Longmaxi formation in Sichuan Basin is taken as an example. Taking the two-step method of “TOC + mineral composition” as the basis of lithofacies division, the lithofacies distribution characteristics in lateral, longitudinal and plane of Longyi submember are described. The results show that the carbon content gradually decreases longitudinally, from high carbon siliceous shale to low carbon clay shale due to the influence of sedimentary environment.The types of lateral and plane lithofacies vary greatly. The overall development degree of sedimentary rocks is in the hinterland of the basin, which is better than that near the denudation line of paleo-uplift. In the study of tectonic basin control, the influence of crustal uplift, fold and fault on shale gas reservoir and micro-fracture development is emphatically analyzed. After uplifting, the crust is easy to be weathered and eroded, the cover becomes shallower and thinner, and the hydrocarbon sealing capacity decreases. Through the results of core observation, data statistics and stress analysis, the influence of folds and faults on the opening degree, development direction and areal density of micro-fractures is explicated, which lays a good foundation for evaluating the exploration and development potential of shale gas in Longmaxi formation.

合写作者：

潘仁芳,黎洋,朱正平,王跃祥,刘义生

第一作者：

金吉能

论文类型：

期刊论文

论文编号：

8aa886417db21825017db3cfa7ad05e2

卷号：

30

期号：

06A

页面范围：

6855-6864

ISSN号：

1018-4619

发表时间：

2021-01-01