Restoration Of Prototype Basins In Permian Source Rocks In Eastern Hashan Area

There are many oil and gas fields discovered in the Hasan area in the northwestern margin of the Junggar Basin.The oil and gas resources are rich.The early exploration focused on the Wuxia fault zone and the Kebai fault zone in the southern part of the Hashan Mountains.Oil and gas exploration in the region has been stagnant.Because of the superimposed transformation of multi-phase.tectonic movements in the eastern Hashan area,the current distribution of source rocks is complicated,which has caused some difficulties in the study of source rocks.For the very complex structure,the balance profile method is used.And the thickness trend epitaxy method to calculate the amount of erosion,using the MOVE software to strip back layer by layer to restore the prototype basin of the Permian period in the Hashan area,and understand the entire evolution process from the prototype basin to the residual basin in the Hashan area.The main appearance of the main source rocks of the Permian in the development period of the prototype basin was obtained,so as to grasp the development rules of the main source rocks of the Permian and better study the geological characteristics,sedimentary characteristics and the main source rocks of the Permian.Accumulation conditions.During the formation and evolution of the Permian tectonics in the eastern Hashan area,the regional stress field experienced a transition from extension to compression.During the structural evolution of the Permian prototype basins,it was found that there may be paleo-uplifts in the eastern part of the Hashan Mountains,which is manifested as the absence of the Fengcheng Formation.Combining the data of the neighboring areas,The source rocks of the Fengcheng Formation are superior to the Wuerhe Formation,Jiamuhe Formation and Fengcheng Formation in terms of organic matter abundance,type and maturity.The source rock has a large thickness and a wide distribution range,and appears as a strip on the plane.The restoration of tectonic equilibrium section believes that the structural inversion that occurred in the Late Permian formed a large number of thrust nappe structures that had an important impact on the hydrocarbon generation of the source rocks of the Fengcheng Formation.