辽河盆地东部凹陷地热史与油气  

GEOTHERMAL HISTORY AND HYDROCARBON IN EAST DEPRESSION OF LIAOHE BASIN

作　　者：陈昭年[1] 

机构地区：[1]中国地质大学能源系

出　　处：《成都理工学院学报》1997年第4期36-42,共7页Journal of Chengdu University of Technology

摘　　要：辽河盆地东部凹陷是在晚白垩世—古新世区域隆起背景上形成的新生代板内裂陷。其构造演化经历了穹窿作用→火山作用→裂陷作用→热沉降作用等阶段，盆地形成机制属“主动裂陷”。利用研究区镜煤反射率（Ｒ０）实测值的统计分析资料，采用Ｒｏｙｄｅｎ和Ｋｅｅｎ提出的有岩脉侵入的非均匀伸展地热史模型，重建古热流和古地温，并计算成熟度Ｃ值。研究结果表明，东部凹陷的沙三段生油岩已进入生油窗；在凹陷的东部陡坡带具有较好的油气远景。The east depression of Liaohe Basin is a Cenozonic intra continental rifting basin formed on the late Cretaceous Paleocene regional uplift. Its tectonic evolution includes doming → volcanism → rifting → thermal subsidence. The formation mechanism of the basin is recognized as the “active rifting”. Based on the measuring statistical values of R 0 in this region and using the Nonuniform extension model with vein intrusion proposed by Royden and Keen, we reconstructed the palaeoheat flow and the palaeogeotemperature and calculated the C value of maturity, which shows that Shasan section (E s 3 )is just within the oil window. Hydrocarbons generated and accumulated there and formed reservoirs in the scarp of the east depression.

关 键 词：地热史模型 古热流 古地温 生油窗 油气藏 

分 类 号：P618.130.1[天文地球—矿床学] P314.2[天文地球—地质学]