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- Title
川中北部侏罗系正断层特征及有利勘探方向.
- Authors
苏楠; 陈竹新; 杨威; 王丽宁; 李文正; 杨春龙; 黎荣; 张璐; 马雪莹; 张豪
- Abstract
There has been very limited studies focusing on the fault system in Jurassic strata in Sichuan Basin, restricting the understanding of the hydrocarbon accumulation mode of the Shaximiao Formation and the expansion of exploration range. Based on interpretation and coherent slice analysis of abundant seismic data, it is newly discovered that normal faults are widely developed in northern central Sichuan Basin in Jurassic strata. These faults mainly extend from Lower to Upper Jurassic strata, and is characterized by the continuous arrangement of NEE-trending small faults in the plane, while a few NNE-trending and NNW trending faults are developed. The Jurassic fault combination are different in the basin, where the normal faults are mainly distributed in the low uplift of the central Sichuan and the north of central Sichuan. According to the comparison of geochemical data, the normal faults could communicate the Jurassic source rocks and Shaximiao Formation reservoir in these areas. The newly discovered normal faults are superimposed with the middle and Lower Jurassic source rocks in the northern central Sichuan Basin. A new hydrocarbon accumulation model of hydrocarbon generation from the middle and lower Jurassic and normal faults communication could be formed. Among these areas, multi-stage channel superimposed development zone near normal faults is one of the favorable exploration directions.
- Subjects
SICHUAN Sheng (China); HYDROCARBONS; JURASSIC Period
- Publication
Natural Gas Geoscience, 2023, Vol 34, Issue 9, p1581
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2023.03.022