岩性油气藏分布区定量预测新方法——以大民屯凹陷为例  

A new quantitative prediction method for lithologic reservoirs distribution:A case from the Damintun Sag

作　　者：李建华[1] 庞雄奇[1,2] 宋兵[1] 陈冬霞[1,2] 马俊宝[1] 

机构地区：[1]中国石油大学(北京)盆地与油藏研究中心 [2]中国石油大学(北京)油气资源与探测国家重点实验室

出　　处：《石油勘探与开发》2011年第6期756-763,共8页Petroleum Exploration and Development

基　　金：国家自然科学基金项目"砂岩透镜体油气藏形成的动力学机制"(40802029)

摘　　要：统计大民屯凹陷岩性油气藏地质特征、分布规律发现,烃源灶(S)、界面势能(P)、沉积相(D)和区域盖层(C)是控制大民屯凹陷岩性油气藏形成和分布的4个功能要素,据此提出T-CDPS功能要素组合控油气分布模式及岩性油气藏有利分布区带预测方法。4个功能要素在纵向上的有序组合控制着岩性油气藏的成藏层位,在平面上的叠加复合决定着岩性油气藏的分布范围,在地史过程中的同时联合决定着油气成藏的时间。通过分析各功能要素的单因素控油气作用及其定量表征方法,得到单因素控藏概率,经加权平均得到综合控藏概率指数,根据该指数的大小可预测岩性油气藏分布有利区。应用T-CDPS功能要素组合控油气分布模式预测大民屯凹陷古近系Es33、Es34和Es4岩性油气藏最有利分布区,应用结果证明了其有效性和可行性。The regional caprock（C）,favorable sedimentary facies（D）,surface potential（P） and source rock（S） are 4 functional elements that control the formation and distribution of lithologic reservoirs in the Damintun Sag.Based on this,this paper proposes a T-CDPS model with 4 functional elements to control hydrocarbon distribution and the method of predicting the favorable areas of lithologic reservoirs.The 4 elements’ combination in vertical and superimposition on the horizon control the strata and scope of lithologic reservoirs,respectively;they jointly determine the time of reservoir formation in geohistory.The integrated probability index of the factors’ control on reservoir,calculated by the weighted mean of the probability index of single factor’s control on reservoir that is obtained by the analysis of its hydrocarbon controlling process and quantitative characteristics,can help predict the favorable area of lithologic reservoir distribution.T-CDPS model was applied to predict the favorable areas of lithologic reservoirs in Paleogene Es33,Es34 and Es4 strata of the Damintun Sag and has been proved feasible and effective.

关 键 词：岩性油气藏 功能要素 要素组合 成藏概率 有利区预测 大民屯凹陷 

分 类 号：TE122.1[石油与天然气工程—油气勘探]