地质与资源2017，Vol.26Issue(2)：140-146,7.
辽河盆地西部凹陷沙河街组古近系页岩气成藏地质条件研究
GEOLOGICAL CONDITIONS OF SHALE GAS ACCUMULATION OF PALEOGENE SHAHEJIE FORMATION IN THE WESTERN SAG OF LIAOHE BASIN
摘要
Abstract
The Western Sag of Liaohe Basin,which keeps the longest time of lake sedimentation in the basin,is an ideal area for the research of shale gas accumulation conditions of Shahejie Formation in Liaohe Basin.On the basis of data collection,processing and analysis,it is concluded that,the dark mudstone in the study area is mainly developed in half deep-deep lake environment with thick bottom,good continuity and wide distribution.The abundance of organic matter in mudstone is high,with average TOC around 2.18％.The kerogen is dominated by type II,preferring to produce gas.The maturity of organic matter is generally greater than 0.59％,suggesting that the shale has entered the major stage of hydrocarbon expulsion.The contents of brittle minerals are up to 43.1％-61.5％,which is advantageous for the exploitation of shale gas.Comprehensive analysis of the geological factors of shale gas accumulation shows that the Qingshui subsag serves as the favorable area for shale gas exploration in the Western Sag.关键词
辽河盆地西部凹陷/沙河街组/页岩气/有机质类型/成藏条件Key words
Western Sag of Liaohe Basin/Shahejie Formation/shale gas/type of kerogen/reservoir forming condition分类
天文与地球科学引用本文复制引用
李毅,方石,孙平昌,张新荣,李德强,李永飞,任德生..辽河盆地西部凹陷沙河街组古近系页岩气成藏地质条件研究[J].地质与资源,2017,26(2):140-146,7.基金项目
国家自然科学基金项目(41472173,40902057,40702027) （41472173,40902057,40702027）
中国地质调查局项目(12120114065901-01) （12120114065901-01）
国土资源部公益性行业科研专项经费项目(201311111). （201311111）
