智能分注分采技术改善水驱开发效果评价方法

近年来,智能分注分采技术在改善油藏水驱开发效果方面发挥着十分重要作用,为评价该技术改善水驱开发效果程度,考虑储层物性、流体性质、采出程度和开发动态等影响因素,建立了一套量化综合评价方法.首先对油田常用开发效果评价指标进行归纳分类,确定筛选原则并依据逻辑分析法筛选出了9个典型评价指标,再以采收率为目标函数,结合灰色关联分...

Evaluation method of intelligent separate injection-production technique for improving water-flooding development effect

In recent years,intelligent separate injection-production techniques have been playing a very important role in improving the water-flooding development effect of reservoirs.For the evaluation of the improvement in water-flooding de?velopment effect,a set of quantitative comprehensive evaluation method is established considering the influencing factors such as physical properties of reservoirs,fluid properties,recovery,and development performance.Firstly,common evalua?tion indexes are classified and the selection principle is determined to sort out nine typical evaluation indexes according to the logical analysis method.Then,the comprehensive weights of evaluation indexes are determined through grey relational analysis and analytic hierarchy process with recovery factor taken as the objective function.On this basis,according to the existing industry standards for the grading of oilfield development levels,the grading scoring standards at different crudeoil viscosity and water-cut stages are established.The comprehensive score and score difference before and after the appli?cation of the intelligent separate injection-production technique in the target oilfield are calculated.The score difference represents the improvement in water-flooding development effect.A greater score difference means a better improvement in water-flooding development effect and a higher producing degree of the remaining oil.The results of numerical simulation also show that there is a positive correlation between score difference and increased oil production.