Analysis Of Carboniferous-permian Structural Deformation Characteristics And Reservoir-forming Potential In Huanghua Depression

Huanghua Depression is a secondary negative structural unit in the north-central Bohai Bay Basin.Complex structure and rich oil and gas.Predecessors mainly studied the geological structure of Cenozoic basins in depth,but did not systematically study the distribution,structural deformation and evolution of basement strata such as Paleozoic and Mesozoic,and did not have a perfect understanding of oil and gas accumulation.Based on the theory of plate tectonics and petroleum geology,this paper studies the Carboniferous-Permian in Huanghua Depression by using the methods of seismic interpretation,structural analysis,equilibrium profile and physical simulation,identifies unconformity surfaces and divides structural levels,further defines the distribution range of Carboniferous-Permian structural layers,analyzes its fault types,fault periods,plane fault combination characteristics and main fault development characteristics,summarizes structural families and styles,and divides fault systems and fault combination characteristics.Summarize the structural evolution characteristics of Huanghua Depression;Based on the theory of oil and gas accumulation,the reservoir-forming and controlling model of Carboniferous-Permian structural layer is established.Through the analysis of the structural characteristics and evolution characteristics of typical buried hills in three structural areas of Huanghuaao Depression,the structural formation characteristics of the study area are summarized and the main controlling factors of structural deformation are analyzed.The physical simulation sandbox experiment is designed by controlling variables,so as to better observe the morphological changes in each stage of the deformation process.By studying and clarifying the characteristics and evolution of structural deformation in the depression,the oil and gas accumulation model of structural layers in this area is established,which has a great supplementary support to the oil and gas accumulation theory of the old structural layers in the superimposed basin,and also has a good promotion to the deep and peripheral exploration in the study area.