杭锦旗地区二叠系储层油气成藏期次及流体势特征  

Hydrocarbon Accumulation Stages and Fluid Potential Characteristics of Permian Reservoirs in Hangjinqi Area

作　　者：李晓光 倪智勇[1,2] 宋到福[1,2] 张旋 韩子敬 张威[3] 安川[3] Li Xiaoguang;Ni Zhiyong;Song Daofu;Zhang Xuan;Han Zijing;Zhang Wei;An Chuan(State Key Laboratory of Oil and Gas Resources and Exploration,China University of Petroleum,Beijing 102249,China;School of Earth Sciences,China University of Petroleum,Beijing 102249,China;Exploration and Development Research Institute of Sinopec North China Oil and Gas Company,Zhengzhou 450006,China)

机构地区：[1]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 [2]中国石油大学(北京)地球科学学院,北京102249 [3]中国石化华北油气分公司勘探开发研究院,郑州450006

出　　处：《吉林大学学报（地球科学版）》2024年第4期1110-1123,共14页Journal of Jilin University：Earth Science Edition

基　　金：中国石油化工集团项目(HX20191200)。

摘　　要：杭锦旗地区是鄂尔多斯盆地北部重要的含油气区,油气成藏期次及流体势研究有利于探究油气充注的世代以及流体势的分布特征,并进一步判定成藏期油气的运移方向。本文以什股壕区块和十里加汗区块5口井的二叠系下石盒子组盒一段储层砂岩为研究对象,基于流体包裹体分析厘定油气成藏期次,并结合流体势理论计算研究区关键成藏期的流体势并揭示油气的运移方向。研究结果显示:什股壕区块盒一段储层油气的成藏时间为132~102 Ma;十里加汗区块盒一段储层油气的成藏时间为132~101 Ma。杭锦旗北部的什股壕盒一段储层油气的流体势为18 128~22 872 J/kg;杭锦旗南部的十里加汗区块盒一段储层油气的流体势为22 975~27 153 J/kg。本文认为研究区二叠系盒一段储层油气成藏时间在早白垩世,十里加汗区块整体的流体势要高于什股壕区块,油气具备由南部向北部运移的趋势。Hangjinqi area is an important hydrocarbon bearing area in the north of Ordos basin.The study of petroleum accumulation periods and fluid potential is conducive to exploring the generation of petroleum filling,the distribution characteristics of fluid potential,and further determining the migration direction of oil and gas during the accumulation period.In this paper,the reservoir sandstones of the First Member of Xiashihezi Formation(He 1)of the Permian system in five wells of Shiguhao block and Shilijiahan block are taken as the research objects.Based on the fluid inclusion analysis,the petroleum accumulation periods are determined,the fluid potential of the key reservoir formation periods in the study area is calculated,and the migration direction of petroleum is revealed by combining the fluid potential theory.The research results showed that the petroleum accumulation time of He 1 Member reservoir was 132-102 Ma in Shiguhao area,and 132-101 Ma in Shilijiahan area.The fluid potential of petroleum in He 1 Member of Shiguhao area in the north of Hangjinqi is 18128-22872 J/kg,and of Shilijiahan area in the south of Hangjinqi is 22975-27153 J/kg.It is considered that hydrocarbon accumulation time of the Permian He 1 Member reservoir was in the Early Cretaceous.The overall fluid potential in Shilijiahan area is higher than in Shiguhao area,and the petroleum has a migration trend from south to north.

关 键 词：流体包裹体 成藏期 流体势 油气运移 储层 杭锦旗地区 鄂尔多斯盆地 

分 类 号：P597[天文地球—地球化学] P618.13[天文地球—地质学]