油藏分注设计的层段组合参数优化

Research on Optimization Method of Layer Period Combination Parameter for Separated Layer Water Injection Design

现场实施分层注水时,层段组合方式对油田的采出效果影响较大。运用油藏数值模拟的方法,系统研究了注水开发中层段组合的技术界限。研究表明隔层面积、渗透率级差、原油黏度级差、油层有效厚度等因素对于分层注水有较大的影响。在此基础上,提出了可量化的优化系数概念,并利用灰色关联方法进行计算。结果表明优化系数和采出程度之间有良好的线性相关性,可以作为标定油层品味的依据。解决了传统的以单因素为基准划分层系过程中出现的划分结果相互交叉、不唯一的问题,有利于对储层进行正确的评价与组合。

With reservoir numerical simulation method,technology boundaries for layer period combination are given in the water-injection development.Permeability,viscosity,effective thickness,water injection time,number of segments,recovery have great effect on separated layer water injection.On this basis,quantitative optimization coefficient is put forward,and calculated with Grey correlation method.Results show that optimization coefficient and recovery of each layer have a good linear correlation which can be used as a basis of layer period combination.Optimization coefficient solves the nonuniqueness problem of the traditional layer period combination based on single factor and is advantageous to the reservoir layer evaluation and combination.