相渗曲线和水驱曲线与水驱储量的关系

根据相渗曲线和油水两相渗透率比值的表达式,导出了相渗曲线、水驱曲线和水驱储量的定量关系。结果表明,水驱地质储量大小与水相指数、油相指数之和呈正比,与甲型水驱曲线的斜率和驱油效率之积呈反比。这也解释了童宪章院士提出的“7.5 法”不适用低渗油田的原因。

Quantitative Relationship Between Relative Permeability Curve,Water Drive Curve and Waterflood Reserve

According to the expressions of relative permeability curves and relative permeability ratio to oil and water, a quantitative relationship between relative permeability curve, water drive curve and waterflood reserve is derived. The result shows that water drive geological reserve is direct proportion to the sum of Corey exponent for water and Corey exponent for oil and inverse proportion to the product of slope of the first water drive curve and oil displacement efficiency. It also explains the reason why the formulae by Dr. Tong Xianzhang are not suitable for predicting waterflood reserves and geological reserves of low permeability fields.