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由于低渗透夹层有着不同于常规层的测井响应,因此测井响应来自油气的成分较少。为了探明储层内部的低渗透夹层对于层内的非均质性以及采出程度的影响,文章通过数值模拟的方法,即首先利用某油田的相关资料建立数值模型,运用正交试验对夹层在井网中的位置、夹层的渗透性、夹层厚度、延展长度、夹层上下储层的层间渗透率的非均质性以及采油速度这六个因素分别进行研究分析。通过正交试验分析,结果表明:夹层影响注水效果的主要因素是夹层上下储层的层间渗透率的非均质性,而夹层的渗透性、夹层厚度、延展长度、位置以及采油速率这5个因素对于采出程度没有明显的影响。
Because the low permeability interlayer has a different well logging response than the conventional one, the well logging response comes from less oil and gas components. In order to find out the effect of low permeability interlayer on the heterogeneity and the degree of recovery in the reservoir, the numerical simulation method is used to establish the numerical model by using the related data of an oilfield. The factors including location in well, permeability of interlayer, thickness of interlayer, extension length, heterogeneity of interlayer permeability in upper and lower reservoirs, and oil recovery rate were studied and analyzed respectively. The results of orthogonal experiment show that the main factor that affects the water injection effect of interlayer is the heterogeneity of interlayer permeability between upper and lower reservoirs, while the interlayer permeability, interlayer thickness, extension length, location and oil recovery rate are 5 The factors have no obvious effect on the recovery rate.