Physical simulation of sand lens reservoir formation in continental rifted basin

Sand lens reservoir is the main type of lithologic reservoirs for increasing reserves in continental rifted basin,but its hydrocarbon migration process and mechanism still remain discussing.A lithologic trap model has been established to simulate hydrocarbon migration and accumulation in sand lens reservoir.The differences in the process and mechanism of hydrocarbon accumulation in sand lens reservoir under different geologic conditions have been confirmed.Episodic accumulation is outstanding for high efficiency and high speed.Hydrocarbon-source conditions,transport conditions,the distance between source rocks and reservoir rocks as well as sand body properties control the formation of sand lens reservoir.