关于三元复合驱的两点思考

Two considerations on the ASP flooding

通过对三元复合驱井距与驱油效率和扩大波及体积关系的分析,发现三元复合驱随着井距的扩大其驱油效率会下降,而同时其扩大波及体积作用则增大,提高采收率值会下降,所以目前技术条件下三元复合驱井距不宜过大。同时分析了常用室内岩芯实验与矿场试验的差别,室内岩芯多使用一维或二维的,其流体流动趋向线性流,而实际上油田生产时其流体流动是径向流,两种流动方式对注入压力上升幅度影响程度不同,因此就具有扩大波及体积作用的三元复合驱来说,目前常用的岩芯实验驱油机理上不能完全代表矿场试验,所以在进行机理研究时应该用径向流岩芯实验来模拟研究矿场试验。

Analyzing about the relations between well spacing and flooding efficiency and swept volume by ASP flooding, learning that with well spacing expanded while flooding efficiency descended and swept volume enlarged. So the recovery will be lower, therefore the well spacing may be unfavorable for being enlarged. Compared with the difference of lab core test and field test, the core test was one or two dimensional and showed linear flooding. Actually there existed radial flooding in the field. The effects on the injection pressure by the two above flooding manners were different. For the ASP flooding, as the effect of swept volume enlarged and from the view of flooding mechanism, core test cannot be replaced the field test, the radial core test should be simulated on the field ta.~t~