一种弱凝胶驱数模物化参数的修正方法

Study on Gel Physicochemical Parameters Correction Method

物化参数是弱凝胶驱数值模拟工作的关键参数,其准确性将直接影响弱凝胶驱数值模拟的评价和预测结果。现行方案通常通过室内实验测得物化参数,然而,由于室内实验的计量误差和实验本身的不稳定性,测得的弱凝胶物化参数往往存在一定误差。如果在数值模拟中运用这类参数,将会导致结果与实际效果的偏差。现提出了一种弱凝胶驱物化参数的修正方法,构建实验级别的数值模型,通过拟合实验动态来修正弱凝胶物化参数,并在L油田的数值模型中进行了验证,结果表明修正后的弱凝胶物化参数的准确性显著提高,更适用于矿场实际的数值模型和弱凝胶驱效果评价,该方法对类似的弱凝胶驱油田具有一定的推广和借鉴意义。

Physicochemical parameters are critical for weak gel flooding numerical simulation, whose precision would directly affect prediction result of simulation. At present, physicochemical parameters are measured in the lab, which will take deviation into the parameters. If this kind of parameters is used in simulation, the result would be much different from reality, making simulation unreliable. In this paper, a method of gel physicochemical pa- rameters correction is proposed. Based on the combination of numerical simulation and displacement experiments, lab-scale numerical model is built, by matching water flooding, polymer flooding and weak gel flooding experi- ments, physicochemical parameters are modified. After that, modified parameters and unmodified parameters are input into L oilfield reservoir model to verify. It concludes that modified parameters are more suitable for field-scale model and weak gel flooding evaluation. This method is applicable for similar oilfields.