三角洲相储层油藏无因次采液指数计算的典型通用公式

为了准确认识油藏动态变化规律，为油田开发设计，开发调整及开发分析提供重要依据，根据所建立的三角洲相储层渗透率平面分布抽象模型和三角洲相储层典型参数，并考虑油水粘度比，油水井数比，井距不均匀系数，井网密度，平面渗透率对数正态分布变异系数，概率50％处渗透率，油藏大小，断层边界，含水率等影响因素，进行了27个方案的数值模拟，处理数值模拟结果，得出了计算三角洲相储层油藏含水率为1．0时的无因次采液指数JL1．0回归公式以及无因次采液指数JL与含水率fw关系的典型通用公式，计算实例表明，通用公式计算结果基本符合油藏实际。

A TYPICAL AND GENERAL FORMULA FOR CALCULATING DIMENSIONLESS LIQUID PRODUCTION INDEX FOR DELTAIC RESERVOIR

According to the established abstract model of planar heterogeneous permeability distribution and the typical parameters of deltaic reservoir,and combining with 9 factors (oil-water viscosity ratio, producer-injector ratio, non-uniform coefficient of well spacing, well density, variation coefficient of logarithmic normal distribution of plane permeability, permeability of 50% probability, reservoir size, fault boundary and water cut), 27 numerical simulations are implemented, giving a regression formula for calculating dimensionless liquid production index _L at water cut fw=1.0 and a typical and general formula of dimensionless liquid production index _L vsfw for deltaic reservoir. An example shows that the calculated results by the typical and general formula are largely consistent with the practical reservoir data.