【摘要】 沉积盆地是一个巨大的低温热化学反应发生器 .以辽河盆地大民屯凹陷曹台基岩潜山油藏为例 ,以其烃源岩在埋藏、压实、热力等因素作用下 ,达到成熟、生烃的动力学思路和方法为指导 ,探讨了曹台潜山原油的成因、来源及烃源岩的生烃过程 .回剥反演了烃源岩的沉积埋藏史 ,磷灰石裂变径迹恢复了古地温 ,得出该油藏的原油是未发生降解的成熟型原油 ,潜山烃来源于西侧深凹陷的沙四段 (Es4)暗色泥岩 .目前烃源岩还处于生烃高峰期 ,油藏尚处于油气充注阶段 ,由此解释了该油藏上部与下部原油物性不同的原因 ,同时预示出在油藏深部尚有勘探价值 .更多还原

【Abstract】 The sedimentary basin is a giant epithermal alterator. The Caotai basement rock buried hill pool in Damintun sag, Liaohe basins is taken as an example in this paper. The maturation and hydrocarbon formation of its source rock’s dynamic processes are studied with dynamic theory, just as sedimentation, compaction, thermomaturation, etc. The high pour point oil’s origination and the location of the source rock are researched. The sedimentary history of source rock is identified by back stripping, and the paleo-geothermal is recalled by fission tracks in apatite. The result is that the high pour point oil is primary mature petroleum, and the oil came from Paleocene (E 4 s) source rock of the west deep sag. The oil generation window was 75～125℃.更多还原