底水油藏油井见水时间预测

Water breakthrough time prediction of oil wells in the bottom water reservoir

根据渗流力学理论,建立了底水油藏见水时间计算模型,推导出无夹层情况下和有夹层情况下的底水油藏油井见水时间公式,并结合实际底水油藏地质特征,对公式里的孔隙度、两相流区间含油饱和度、储层渗透率系数三个参数的取值进行论证。应用推导出的见水时间公式计算了3口发育夹层的油井的见水时间,与实际见水时间相比,计算结果相对误差不超过9%,计算精度满足油田开发实际要求。

Based on the theory of seepage mechanics, a model for calculating water breakthrough time of the bottom water reservoir is established, and the formulas of water breakthrough time of oil wells in the bottom water reservoir without interlayer and with interlayer are deduced. Combined with the actual geological characteristics of bottom water reservoir, the values of three parameters in the formula are demonstrated, including porosity, oil saturation of two-phase flow interval and permeability coefficient of reservoir. The water breakthrough time of three wells with interlayers is calculated by the derived water breakthrough time formula. Compared with the actual water breakthrough time, the relative error is no more than 9% and calculation accuracy meets the actual requirement of oilfield development.