南华北东部徐淮地区新元古界生烃潜力分析  

Hydrocarbon-generating potentials of the Neoproterozoic in Xuhuai area,the east part of southern North China

作　　者：李振生[1] 刘德良[2] 吴小奇[3] 王广利[4] 王铁冠[4] 

机构地区：[1]合肥工业大学资源与环境工程学院,合肥230009 [2]中国科学技术大学地球和空间科学学院,合肥230026 [3]中国石油勘探开发研究院石油地质研究所,北京100083 [4]中国石油大学地球科学学院,北京102249

出　　处：《地质科学》2012年第1期154-168,共15页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家自然科学基金项目(编号:40702021;40830426;40972134;41172117)资助

摘　　要：通过地层特征、有机地球化学指标和岩相古地理的分析,研究了南华北东部(徐淮地区)新元古界作为烃源岩及形成原生油气藏的可能性。结果表明:徐淮地区新元古界有机质丰度低,母质类型为Ⅰ型干酪根,热演化程度处于成熟—过成熟阶段;自下而上可划分为青白口系刘老碑组和南华系贾园组—魏集组两套烃源岩,后者又细分为贾园组—九顶山组和张渠组—魏集组两套烃源岩,均仅达到较差烃源岩标准。从烃源条件来看,刘老碑组、张渠组—魏集组和贾园组—九顶山组依次变差;淮北地区比淮南地区更有利。建议该区有利含油气远景区段为蚌埠古隆起周边地带的低热演化区块。Based on the synthetical analyses of stratigraphic characters,organic geochemical indexes and lithofacies paleogeography,the probability of the Neoproterozoic source rocks and primary petroleum reservoirs in Xuhuai area was discussed.Xuhuai area locates in the east part of southern North China and is divided into Huainan and Huaibei district by Bengbu-Jieshou ancient uplift.Lower mudstones of Liulaobei Formation and upper carbonates of Jiayuan to Weiji Formation reached just the standard of hydrocarbon source rocks,and the latter could subdivided into Jiayuan to Jiudingshan Formation and Zhangqu to Weiji Formation.The Neoproterozoic source rocks contain low abundance of organic matter and Ⅰ-type kerogen with the mature to over-mature stages of thermal evolution.The hydrocarbon source quality of Liulaobei Formation,Zhangqu to Weiji Formation and Jiayuan to Jiudingshan Formation become worse in turn,and the Huaibei district was better than the Huainan district.The surrounding area of Bengbu-Jieshou ancient uplift with lower thermal evolution is favorable prospect areas.

关 键 词：南华北 新元古界 烃源岩 徐淮地区 有机质丰度 

分 类 号：TE122[石油与天然气工程—油气勘探]