利用曲面反应法研究底水油藏水平井含水率变化规律

为揭示底水油藏水平井含水率变化规律,有效降低底水锥进对油藏开发的影响,在建立底水油藏数值模型基础上,运用Box-Behnken实验设计法,对水平井见水特征参数b的6个影响因素(水平井无因次位置、油水黏度比、水平段与主渗透率方向的夹角、垂向与水平渗透率比值、水平段长度、油藏厚度)进行了详细研究。实验后期通过运用曲面反应法得出各影响因素对水平井含水变化的影响顺序和影响交互性。该研究成果对底水油藏的水平井开发具有理论及现场指导意义。

Application of response surface method to study water cut change in horizontal wells of bottom water reservoirs

This paper studied the law of water cut change in horizontal wells of bottom water reservoirs in order to reduce the effect of bottom water coning on reservoir development. Six influential factors(horizontal well dimensionless location,oil/water viscosity ratio,angel between horizontal interval and principal permeability direction,vertical/horizontal permeability ratio,horizontal length and reservoir thickness) on Parameter b,which characterizes water breakthrough in horizontal well,have been scrutinized by using Box-Behnken experimental design method based on numerical simulation model of bottom water reservoir. In the later period of the experiment,the influence sequence and interaction of the influential factors on the change of water cut in horizontal wells were obtained by using response surface method. The research results are of theoretical and field guiding significance to the development of bottom water reservoir with horizontal wells.