石油实验地质Issue(4)：372-377,6.DOI:10.11781/sysydz201304372
湘鄂西区寒武系层序划分及其对油气勘探的意义
Sequence stratigraphic division of Cambrian in western Hunan-Hubei and applications for petroleum exploration
王必金 1包汉勇 1郭战峰 1陈绵琨1
作者信息
- 1. 中国石油化工股份有限公司 江汉油田分公司，武汉 430223
- 折叠
摘要
Abstract
The systematic analyses of outcrops and drilling profiles and the tests of reservoir samples and dark mudstones from Cambrian in the western Hunan-Hubei indicate that the Cambrian in the study area can be divid-ed into 6 third-order sequences, and the sequence boundaries are mainly unconformity surfaces and lithologic transitional surfaces. Oolitic limestones/dolomites are the most favorable reservoirs in Cambrian. They mainly distribute in the transgressive system tract of sequence 5, and a few of them locate in the highstand system tract of sequences 4 and 5. The content of total organic carbon (TOC) varies obviously among dark mudstones in the Lower Cambrian. The dark mudstones rich in TOC distribute in the highstand system tract of sequences 1, while those in the upper formation have lower TOC content. The transgressive system tract of sequence 5 which deve-lops thick oolitic limestones/dolomites is the main target for normal exploration. The highstand system tract of se-quences 1 which has higher TOC content is the main target for shale gas exploration.关键词
层序地层/储层/页岩气/寒武系/湘鄂西Key words
sequence stratigraphy/reservoir/shale gas/Cambrian/western Hunan-Hubei分类
能源科技引用本文复制引用
王必金,包汉勇,郭战峰,陈绵琨..湘鄂西区寒武系层序划分及其对油气勘探的意义[J].石油实验地质,2013,(4):372-377,6.
