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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 .
The sedimentary basin is a huge low-temperature thermo-chemical reaction generator.The reservoir of the Caoti bedrock buried in the Damintun depression of Liaohe Basin is taken as an example, and under the action of burial, compaction and heat, Hydrocarbon kinetics and methods are used as a guideline to discuss the genesis and source of the buried oil in the buried hill of Caotai and the hydrocarbon generation process of the source rock.The back-stripping inversion of the sedimentary burial history of the source rock, apatite fission track restored the ancient The result shows that the crude oil of this reservoir is a mature crude oil that has not degraded, and the buried hydrocarbon comes from the Es4 dark mudstone in the deep depression on the west side.At present, the source rock is still at the peak of hydrocarbon generation, Which is still in the stage of oil and gas filling, thus explaining the reasons for the different physical properties of the upper and lower crude oil reservoirs, and at the same time indicates that there is still exploration value in the deep reservoir.