X油田特低渗透油藏井网加密效果预测方法

基于实际油藏井网加密调整后的动态开展效果预测研究，可为油田开发规划提供调整依据。通过对X油田特低渗透油藏井网加密调整前后开发动态变化分析，确定了加密增产效果变化规律及其主要影响因素；基于建立的反映实际油藏特点的典型数值模型，应用响应面设计方法和逐步回归方法，综合研究了不同因素变化对井网加密后增产效果的影响，并得到了反映特低渗透油藏特点的、考虑多因素影响的井网加密调整增产效果预测模型。预测模型在X油田特低渗透油藏中的实际应用表明，预测精度较高，并具有很强的针对性和实用性。本文建立的以“增产倍数”来表征油藏加密调整后的增产效果的方法，可为特低渗透油藏加密调整效果预测提供参考，并为此类油藏的开发规划提供可靠依据。

Prediction method of well pattern infilling effect for ultra-low permeability reservoir in X oilfield

The dynamic development effect prediction research based on actual reservoir well pattern infilling adjustment can provide adjustment basis for oilfield development planning. Based on the dynamic analysis of the development before and after well pattern infilling adjustment for ultra-low permeability reservoir in X-oilfield, the change law of infilling yield-increasing effect and its main influencing factors were determined. Based on the typical numerical model established to reflect the characteristics of actual reservoir,the response surface design method and stepwise regression method were applied to comprehensively study the impact of different factors on the yield-increasing effect after well patter infilling,and the prediction model of yield-increasing effect of well pattern infilling adjustment considering multi-factors and reflecting the characteristics of ultra-low permeability reservoirs was obtained. The practical application of the prediction model for the ultra-low permeability reservoir in X oilfield shows that the prediction accuracy is high,and it has strong pertinence and practicability. The method established to characterize the yield-increasing effect of infilling adjustment can provide reference for the prediction of infilling adjustment effect of ultra-low permeability reservoirs,and provide a reliable basis for the development planning of such reservoirs.