地质通报2025，Vol.44Issue(5)：778-791,14.DOI:10.12097/gbc.2024.10.011
鄂尔多斯盆地中部二叠系油气充注期次分析
Analysis of oil and gas accumulation periods in the Permian system in the central Ordos Basin:A case study of Shanxi-Shihezi Formation in Wuqi area
摘要
Abstract
[Objective]The Yishan slope is an area of significant oil and gas-bearing potential within the Ordos Basin,the delineation of the oil and gas formation periods is of paramount importance in the revelation of the laws governing oil and gas storage,and in the provision of guidelines for exploration and development.[Methods]The timing of oil and gas charging can be determined by measuring the homogeneous temperature of fluid inclusions in the Shanxi-Shihezi Formation in the Wuqi area of the Ordos Basin.This is combined with petrological characteristics and thermal evolution history research methods.[Results]The microscopic observation results show that there are mainly two stages of fluid inclusions in the Shanxi-Shihezi Formation in the study area.The early inclusions are mainly distributed in the microcracks quartz particles and the enlarged edges of quartz,and the late inclusions are mainly distributed in the late cement.Through the implementation homogenization temperature test,the peak temperature distribution of early inclusions is 110～120℃,while the peak temperature distribution of late inclusions is 140～150℃.[Conclusions]Combined with the analysis of the thermal evolution history and diagenesis,it can be concluded that there are two periods of oil and gas filling:the first period of oil and gas charging time is the Late Triassic—Early Jurassic(212～195 Ma),the reservoir is in the early diagenetic stage B.During this period,the thermal evolution of the coal-bearing stratum reaches the mature stage with dissolution and replacement being the predominant processes.The second period of oil and gas charging time,spanning the Late Jurassic to Early Cretaceous(155～130 Ma),coincides with the middle diagenetic stage A.In this stage,the diagenetic process is primarily dominated by the dissolution of calcareous cement,leading to an increase in secondary pores and the attainment of the highest thermal evolution,which marks the primary charging time.关键词
油气成藏/均一温度/流体包裹体/二叠系/鄂尔多斯盆地Key words
accumulation period/homogenization temperature/fluid inclusions/Permian/the Ordos Basin分类
天文与地球科学引用本文复制引用
赵凡凡,崔军平,任战利,陶华,蒋安东,苏世豪,宋昊昱,郭伟,刘小艺..鄂尔多斯盆地中部二叠系油气充注期次分析[J].地质通报,2025,44(5):778-791,14.基金项目
国家自然科学基金项目《热年代学约束下的松辽盆地石炭—二叠系构造热演化史恢复》(批准号:41772121)和长庆油田科技重大专项《鄂尔多斯深层中元古界—奥陶系构造沉积演化、成源机制与勘探新领域研究》(编号:ZDZX2021) （批准号:41772121）
