平行水平裂缝系统油水相对渗透率计算新模型

摘要

根据基本流体运动方程，结合达西定律和黏度牛顿定律，利用油藏岩石渗透率合成法则，建立了平行水平裂缝系统油水相对渗透率的计算新模型。结果表明：每条裂缝含水饱和度相等时，平行水平裂缝系统相对渗透率与单条水平裂缝相同，并且与裂缝高度无关；水的相对渗透率随着水油黏度比增加而逐渐增加；油的相对渗透率随着水油黏度比增加而逐渐减少。%Considering the basic equation of fluid motion, together with the Darcy′s law and the Newton′s law of vis-cosity, this paper aims to present the new calculation model of oil-water relative permeability of the parallel horizon-tal fracture system by using the theory of permeability synthesis method of reservoirs.The results show that when water saturation of each fracture is equal, there is equivalence relationship of oil-water relative permeability between the parallel horizontal fracture system and the single one′s, and it also can be determined that the result has no relationship with the height of fracture;with the increasing of water-oil viscosity ratio, the relative permeability of water increased and the relative permeability of oil decreased.