断块层状油藏剩余油分布数值模拟

Numerical simulation of remaining oil distribution in faulted layered reservoir

准确预测剩余油分布的手段之一就是在油藏精细描述基础上进行数值模拟.针对断块层状油藏构造复杂和断层断棱的渗流遮蔽作用强烈情况,给出了一种正确建立储层构造模型和描述断块边界传导率的处理方法.基于断块层状油藏的生产史拟合在数值模拟中的重要地位,提出了先拟合断块生产史,后拟合单井动态的思路.以开发了20年的文25西区断块层状油藏的剩余油分布数值模拟为例对其剩余油分布规律作了论述.

One of the means for accurately predicting remaining oil distribution is the numerical simulation of reservoir based on the fine description of the reservoir. The structure of faulted layered reservoir is more complex, and fault ridge has shielding action to the seepage flow of reservoir fluids. A processing method for correctly establishing the structural model of the reservoir and describing the permeability of the fault ridge is put forward in this paper, which is one of the two keys to the numerical simulation of the faulted layered reservoir; the other key is the fitting of reservoir production history. The idea is put forward that the production history of fault block is firstly fitted, and then the performance of individual well is fitted. This method is applied to the numerical simulation of remaining oil distribution of the faulted layered reservoir in western Wen-25 zone, which has been developed for more than 20 years.