准噶尔盆地东南缘油页岩有机地球化学特征及含气潜力  

Shale Gas Potential and Organic Geochemical Characteristics of Oil Shale in the Southeast of Junggar Basin

作　　者：高苑[1,2] 王永莉[1] 何大祥[3] 孟培[1,2] 吴应琴[1] 王自翔[1,2] 汪亘[1,2] 张虹[1] 巩俊成[1] 杨辉[1] 王有孝[1] 

机构地区：[1]中国科学院油气资源研究重点实验室,甘肃兰州730000 [2]中国科学院大学,北京100049 [3]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249

出　　处：《天然气地球科学》2013年第6期1196-1204,共9页Natural Gas Geoscience

基　　金：中国科学院战略性先导科技专项(编号:XDB03020405;XDA05120204);国家"973"计划子课题(编号:2012CB214701);国家基金面上项目(编号:41172169;41272147);西部之光联合学者项目联合资助

摘　　要：准噶尔盆地页岩气尚属于研究起步阶段,勘探程度低,还未发现页岩气藏。通过对准噶尔盆地东南缘雅玛里克山、水磨沟、三工河等地区上二叠统芦草沟组油页岩样品进行有机地球化学特征系统分析,认为:芦草沟组油页岩有机碳平均含量为9.71%,油页岩氢指数(IH)平均值为471.56mgHC/gTOC,有机质类型主要为Ⅱ型,处于低熟—成熟热演化阶段。通过与北美五大页岩气系统地球化学参数和地质参数对比,初步确定准噶尔盆地东南缘存在发育热成因页岩气藏的条件,部分区域可能有生物成因气生成。3个地区中,以三工河地区油页岩有机质丰度最高,有可能成为研究区页岩气勘探开发的有利区域。The shale gas potential of oil shales of the Lucaogou Formation in SE Junggar Basin was investigated by geochemical analyses,such as Rock-Eval pyrolysis,total organic carbon（TOC）,organic matter composition and biomarkers.The average TOCfrom 45 outcrop samples is 9.71%.The average hydrogen index（IH）value is 471.56mgHC /gTOC,indicative of TypeⅡkerogen.Based on the Tmax and biomarker analyses,all the samples are classified as low mature and mature.The analytical results and the comparison with geochemical and geological parameters from five United States shale formations suggest that the study area is qualified to have themogenic shale gas generation potential and that parts of the study area may have the presence of microbial shale gas.Sangonghe area,one of the three locations of this study is supposed to be the most potential shale gas generation area in the study area,because of its best organic matter richness,the highest maturity and the biggest reservoir thickness.

关 键 词：准噶尔盆地东南缘 油页岩 上二叠统芦草沟组 页岩气 含气潜力 

分 类 号：TE122.113[石油与天然气工程—油气勘探]