陆相断陷盆地砂岩透镜体油藏成藏过程物理模拟

砂岩透镜体油藏是陆相断陷盆地岩性油气藏中储量增长的重要类型,但目前对其成藏动态过程和机理的认识还存在很大分歧。该文根据陆相断陷盆地砂岩透镜体油藏成藏地质特征,针对性地建立岩性圈闭模型,对砂岩透镜体油藏石油运聚成藏过程进行物理模拟。结果表明:不同地质条件下砂岩透镜体油藏成藏过程、成藏机理均存在差异,幕式成藏具有成藏效率高、速度快的特征,即油气源条件、输导条件、源储距离及砂体物性条件是砂岩透镜体油藏成藏的主要控制因素。

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.