Tectonic-stratigraphic Evolution And Predict Oil Reservoir Of Lithology In Maxi Area, Jizhong Depression

The Jizhong Depression is a Cenozoic intra-continenta rift basin and formed since Cenozoic in Bohai Bay Fault Basin ,the basin is rich in hydrocarbon, including the world-class Renqiu buried hill reservoir, and has a great potential of hydrocarbon resources in Maxi area of Raoyang sag. In recent years, the research in tectonic controls on sedimentary of intense tectonic activity basin is one of the focuses in sedimentary basin analysis and sequence stratigraphy study. Based on the framework of sequence stratigraphy and paleo-tectonic, the article analyse the control efforts of synsedimentary activity fault ,which caused the ancient topography, on the system of sediment dispersion and development, forecast the spatial distribution of reservoir sandbody. The exploration and production of hydrocarbon in Masi area has important theoretical and production significance.The article base on the theory of Exxon sequence stratigraphy, set up the Paleogene sequence stratigraph of Masi area, devide into there II stratigraphic orders ,ten III stratigraphic orders.In the study of sequence stratigraphy, the article give full consideration to the tectonic control on sequence stratigraphy and sedimentary. Based on the research of the seismic data structure, the article analyse fault charccteristics and tectonic styles , divide the Paleogene tectonic evolution into five types, that is inheriting type, early prevailing type, transitional type, migratory type and subsiding type.Through the study of sedimentary facies, the ues of geophysical restoration of the ancient landscape, the article analyse the control efforts of ancient topography on sedimentary system, and suggest that : The deposition environment of Sha 3 formation is shallow-semi-deep lake, in the deposition process, the source material from the east along the fault of Masi is formed a thick depositon, delta front sandbody is relatively developed, is the favorable strata series in exploration of hydrocarbon. In the period of Dongying formation, there are small-scale lake-deposition in the southern of work area, it is formed fan-delta deposition and favorable lithologic hydrocarbon reservoir exploration areas. Analyzed the condition of reservioir , the ancient landscape of Masi area control many different types lithostratigraphic traps, and have the fine potential to form reservoirs. There are distributed in the different tectonic transition units, which are the source material of the inlet to the lake, controlled the distribution of favorable reservoir facies, forecasted that fan-delta deposition formation of Masi fault sole and Dongying formation of southern of Xuezhuang-Balizhuang is the favorable areas for lithologic hydrocarbon reservoir exploration.