辽河坳陷东部凸起上古生界致密砂岩气成藏特征  

Diagenetic Characteristics of Tight Sandstone of Upper Paleozoic of East Uplift in Liaohe Depression

作　　者：李春华[1] 于鹏[1] 毛俊莉[1] 李楠 

机构地区：[1]中油辽河油田公司,辽宁盘锦124010 [2]中油长城钻探辽河压裂公司,辽宁盘锦124010

出　　处：《特种油气藏》2013年第1期19-22,151-152,共4页Special Oil & Gas Reservoirs

基　　金：中石油重点科技项目"辽河探区有利预探区带综合评价和目标优选"(2008D-0702-02)

摘　　要：东部凸起为辽河坳陷的一级构造单元,由于勘探程度低,探井有限,对研究区生、储盖、组合等地质条件缺乏系统认识,导致对该地区的勘探一直处于停滞状态。通过对东部凸起已钻探井的录井、测井及岩心资料的系统分析,从烃源岩、储集条件、盖层条件及构造演化的角度出发,对影响油气成藏的主控因素展开分析,认为东部凸起上古生界石炭—二叠系具备形成致密砂岩气藏的优越条件,为该地区开展非常规油气勘探奠定了基础。The main organic matter type of Carboniferous System and Permian System of Upper Paleozoic of Liaohe East Depression is kerogen;abundance indicators and thermal evolution are high,being in the period of large volume of gas-generation;reservoir sand body is the sedimentation majorly under coast facies and delta facies,accumulative thickness is large and porosity and permeability are low;the mudstone of sea facies of Carboniferous System and the unconformity face of Permian System form the second cap rock in this area;the analyses of tectonic evolution shows that the area is of multi-diagenetic characteristics and has reservoir-forming conditions.Drilling shows that the tight sandstone gas reservoirs of Carboniferous System and Permian System belong to originally-forming oil & gas reservoirs,which have the characteristics of abnormal low pressure and inverted position of water and gas.

关 键 词：成藏特征 异常低压 气水倒置 致密砂岩气 东部凸起 

分 类 号：TE121.3[石油与天然气工程—油气勘探]