Hydrocarbon Accumulation Simulation And Prediction Of Exploration Targets In Buried Hill Of Baxian Depression,Bohai Bay Basin

Hydrocarbon accumulation simulation in Baxian Depression is core content in this paper.Base on analysis of regional tectonic evolution,seismic,geochemical drilling data and typical oil and gas reservoir,it shows that buried depth has little impact on reservoir property in buried hill.Pepper&Corvi(1995)hydrocarbon generation kinetics model is using for accumulation modeling.The result of 1D single well simulation shows lower Es4and Ek source rock reached the hydrocarbon generation stage at 38.8Ma,and it is in mature-overmature at present;Es3 source rock reached hydrocarbon generation stage at 35Ma,now is in the main stage of hydrocarbon generation;upper Esl source rock reached the hydrocarbon generation stage at 30Ma,now in mature.There is a set of source rocks in the Ordovician,which is an important source of oil and gas in the buried hill oil reservoir of the Wenan slope.3D simulation includes:temperature,pressure,hydrocarbon generation intensity simulation and hydrocarbon migration simulation.Temperature and pressure simulation results shows that ancient basin basically no large-scale heat flow anomaly change since Tertiary,and the overpressure evolution of the basin is relatively single and has obvious stage;hydrocarbon generation intensity simulation results shows that there is a sufficient source of hydrocarbon in buried-hill reservoir.Combining with the hydrocarbon migration simulation,sedimentary system evolution,sand transporting capacity,activity and seal property of faults and migration dominant channel,we analyze the main control factors of reservoir and predict favorable area of oil and gas.