石油实验地质2019，Vol.41Issue(1)：1-9,9.DOI:10.11781/sysydz201901001
鄂西—渝东北地区五峰组—龙马溪组页岩气成藏地质条件分析
Shale gas reservoir geology of the Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation in western Hubei and northeastern Chongqing
摘要
Abstract
The Upper Ordovician Wufeng Formation and the Lower Silurian Longmaxi Formation are important strata for shale gas exploration in the western Hubei and northeastern Chongqing area. At present, no breakthrough has been made in exploration, and the main factors controlling shale gas enrichment are unclear. The spatial and temporal distribution, geochemical features, reservoir properties and gas-bearing capacities of high-quality shale of deep-water continental shelf facies in the Wufeng-Longmaxi formations were studied based on the analysis of drill core and field outcrop data of well JD1 and its adjacent area in Jianshi area. Organic-rich shale was developed well in the Wufeng-Longmaxi formations. The organic-rich shale of deep-water continental shelf facies was mainly found in the Katian, Hirnantian and Rhuddanian stages, which featured substantial thickness, high TOC content, medium maturity, favorable reservoir conditions and medium burial depth, showing a good potential for shale gas enrichment. The organic-rich shale of deep-water continental shelf facies in the Katian, Hirnantian and Rhuddanian stages had a stable structure with few fractures, and a regional cap rock in the Middle and Lower Triassic and these are the main controls for shale gas enrichment in the Wufeng-Longmaxi formations in the western Hubei and northeastern Chongqing area.关键词
主控因素/成藏条件/页岩气/五峰组—龙马溪组/鄂西—渝东北地区Key words
main controlling factor/accumulation condition/shale gas/Wufeng-Longmaxi formations/western Hubei and northeastern Chongqing area分类
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周志,翟刚毅,石砥石,王胜建,郭天旭,刘一珉,王浩..鄂西—渝东北地区五峰组—龙马溪组页岩气成藏地质条件分析[J].石油实验地质,2019,41(1):1-9,9.基金项目
国家科技重大专项项目"页岩气资源评价方法与勘查技术攻关"(2016ZX05034) （2016ZX05034）
中国地质调查项目"鄂西页岩气示范基地拓展区战略调查(DD20189812)"资助 （DD20189812）
