Hydrocarbon Accumulation Model of Syncline Area in Sanzhao Depression

Using three-dimensional seismic,logging and core data,analysis Sanzhao depression syncline area Putaohua oil and gas sources,fracture characteristics and sedimentary facies,witch shows Putaohua reservoir oil are derived from the underlying source rocks Q2+3 sections;Putaohua reservoir fault have a dense like banding characteristics,and more boundary fault of dense banding are oil source fault activities for the accumulation period;dense well network microfacies reveals Putaohua reservoir developed typical river control shallow water delta,mainly microfacies underwater distributary channel and the end of the fluvial sheet sand.Combination of structural characteristics and oil-water distribution rule controlling factors forming analysis,syncline area Putaohua reservoir controlled oil source faults and channel matched,oil mainly distribute in the fault dense banding and cross-block between dense banding,finally set up within a short distance from the source area vertical migration patterns of foreign expansion,for the development area outstep to provide guidance.