Study On The Main Controlling Factors Of Hydrocarbon Accumulation Of The Jurassic Sangonghe Formation In The North-east Belt Around Depression To The West Of Well Pen-1

Using the latest data of geochemistry,drilling,logging,seismic for interpreting two typical type of low salient such as Xiayan and Qianshao low salient.The study area were investigated by hydrocarbon source,structure,distribution of sedimentary sand bodies,types of reservoirs,controlling factors of accumulation and accumulation model.The results show that there are three types of reservoir,including lithologic reservoir,structural reservoir,structural-lithologic combined reservoir.After analysis on main factors of accumulation which consist resource,structure,distribution of beneficial sand bodies,conclusion that fracture zone combination and frontal sand body of delta controlling the reservoir of two low salients.Find out the near-source follow “Y”fracture along the slope to sand bodies accumulation model and far-source step shape fault block reservoir of accumulation model.Both models of formation are featured by hydrocarbon source rocks,fracture zone combination,beneficial sand bodies of low salients.Laid the foundation of favorable exploration zone optimization for the next step.