通过二维模拟实验探讨了断层物性和倾角变化对济阳坳陷斜坡带油气运聚的影响, 结果表明: ①断层物性的差异影响着油向各砂层运移的动力。由于物性的变化, 使各砂层与断层之间的毛细管力差发生变化。断层物性较差时, 毛细管压力差对油的运移起动力作用, 有利于油运移; 断层物性较好时, 毛细管压力差对油的运移起阻碍作用, 不利于油运移。②断层倾角的差异影响着油向各砂层运移的动力。由于倾角的变化, 使浮力在各砂层的分力发生变化。断层倾角较小时, 浮力在各砂层分力大, 有利于油向各砂层充注; 断层倾角较大时, 浮力在各砂层分力小, 有利于油沿断层向上运移。③断层物性和断层倾角对油气运聚具有互补性。物性愈好、倾角愈大, 愈有利于油气向上部砂层中运聚; 物性愈差、倾角愈小, 上下砂层均有利于运聚。

Based on the 2D simulation experiment, the influences of fault property and the change of dip angle on petroleummigration and accumulation in JiyangDepression are discussed. The results showthat: ① The capillary pressure difference between sands and faults changes with the variational fault property, so fault property affects the petroleum migration. When the fault property is poor, the capillary pressure difference is favorable for the petroleum migration.When the property is better, the capillary pressure difference is unfavorable for the migration; ② The change of dip angle causes the buoyancy in sands to change, so it takes a significant part in the petroleum migration.When there is a small dip angle, the buoyancy is favorable for the oil filling in sands, however, when the dip angle is large, the buoyancy is favorable for the oil migrating upward along the fault; ③ There is a complementarity of the fault property and dip angle for the oil migration and accumulation. The better the property is and the larger the dip angle is, the more favorable they are for the petroleum migrating in the upper sands; while the poor property and small dip angle are favorable for the petroleummigrating in all the sands.