The Investigation Of Oil System And Estimation In West Of Beach In Liaohe Oil Field

Based on the theory of Petroleum System established in the past two decades,This paper discusses detailedly conditions and basic regulations of reservoir formation in paleogene formation of western sag , Liaohe offsore area by the integration of static and dynamic methods ,while values the major object .By the analysis to the basic geologic trellis at first.The paper divides the poleogene formation into six sedimentary sequence with millons years rhythm, demonstrates that the major tectonic movement is characteristic of stretch associated with strike-slip,summarizes the basic types and distribution of depositional system.Based on the analysis to basic geologic trellis ,the paper discusses thoroughly the static elements and dynamic processes of reservoir formation .The former studying includes not only the basic factor of source rock,reservoir and caprock but also tranfer medium and sealing capability of fault.The latter includes the analysis to action and process of hydrocarbon-generating and discharging based on the evolution history of source rock,while puts forward the basic pattrrn of hydrocarbon acculation and reservoir by the analysis to the formatin pressure and fluid potential energy.Based on the studying upwards,the paper analyses the basic types and characteristic of petroleum system, considers that there are a known petroleum system and a speculation,s polymerized each other, and summarizes the relations and key time between each factor of petroleum system.In the end ,the paper anatomizes the six reservoir unit and puts forward next explorative direction.