Box-Behnken试验设计法研究底水油藏水平井含水率变化规律

Application of Box-Behnken test method to study water cut change in horizontal wells of bottom water reservoir

C油田为典型的底水油藏,采用水平井开发。通过利用C油田底水油藏相关的地质、流体数据建立数值模型,在所建模型的基础上,应用数值模拟计算的累积产油、产水和产液量回归俞启泰水驱特征曲线,以反映水平井见水特征的参数b。运用Box-Behnken试验设计法,研究不同影响参数对C油田水平井含水上升规律影响因素显著程度。通过非线性回归方法结合数模结果,得到影响水平井含水上升规律的b值预测公式,可预测老井可采储量以及新井的含水率变化规律。

The C oilfield is a typical bottom water reservoir,horizontal well is used in the reservoir. The geological and fluid property parameters of the reservoir, a bottom water reservoir in the C oilfield, were used to set up a numerical mode. The model was adopted to calculate the cumulative oil, water and fluid production, which were then used to regress the parameter b, disclosing the water cut rising performance, in the YU Qitai water drive curve.Box-Behnken test were then used to study on affecting different factors of water cut rising rules of horizontal well. Applied nonlinear regression method and combined with the numerical model results, the b value prediction formula for influencing the rising law of water cut in horizontal well was obtained. The formula was predicted to recoverable reserves of old well and water content of new well.