青藏高原乌丽冻土区二叠纪煤系烃源岩特征  

Source Rock Potential of Permian in Wuli Permafrost Zone in Qinghai-Tibetan Plateau

作　　者：李小豫 龚建明[2] 陈小慧[3] 王慧东 陈俊文[3] 杨志承[3] 蒋玉波[4] 

机构地区：[1]青海煤炭地质勘查院,青海西宁810001 [2]青岛海洋地质研究所,山东青岛266071 [3]长江大学地球环境与水资源学院,湖北武汉430100 [4]中国海洋大学海洋地球科学学院,山东青岛266100

出　　处：《现代地质》2013年第6期1384-1391,共8页Geoscience

基　　金：国家自然科学基金项目(41273066);青海省治多县乌丽地区天然气水合物调查项目

摘　　要：为了查明青藏高原乌丽冻土区二叠纪煤系烃源岩的生烃潜力,对采集自乌丽水合物试验孔ZK1井及其周边钻孔的岩心样品和露头样品进行了测试。测试结果显示:上二叠统那益雄组上段烃源岩有机质丰度较低,而下段烃源岩有机质丰度较高;烃源岩有机质类型主要为Ⅲ型;烃源岩热演化程度很高,已达过成熟。考虑到泥质烃源岩成熟度很高以及该区存在变质程度很高的煤层,综合研究认为,该区二叠纪煤系烃源岩生烃潜力总体较好。In order to find out the hydrocarbon-generating potential of Permian source rocks in Wuli permafrost zone,Qinghai-Tibetan Plateau,the cores from gas-hydrate trial hole （ZK1）and its adjacent drilling holes were analyzed.The results show that the organic matter abundance of upper member source rocks of Nayixiong For-mation in Upper Permian is poor,while the abundance of the lower member is fair to good.The organic type is mainly constituted by Ⅲ kerogen,which is in favor of generating gas.The thermal evolution degree of Permian source rocks is very high,reaching to excessive maturity.Considering that the maturity of mudstone and meta-morphic grade of coal bed are very high in Wuli Permafrost zone,it can be drawn a conclusion that the hydro-carbon-generating potential of Permian source rocks is general good in Wuli permafrost zone,Qinghai-Tibetan Plateau.

关 键 词：烃源岩 二叠系 乌丽冻土区 青藏高原 

分 类 号：TE132.2[石油与天然气工程—油气勘探]