改进的层次分析法在储层综合评价中的应用——以东营凹陷王家岗油田王146区沙四上亚段为例

Application of improved AHP in comprehensive reservoir evaluation:a case study on the upper Es_(4) formation in W146 area of Wangjiagang oilfield,Dongying depression

针对传统层次分析法(analytic hierarchy process,AHP)主观性强、判断矩阵不一致的缺陷,对判断矩阵的计算方法进行了改进。利用众数及中位数的方法减弱人为主观性对评价结果造成的影响,并采用极差方法确保判断矩阵的一致性,提出一种储层综合评价的改进AHP,并应用该方法对东营凹陷王家岗油田王146区沙四上亚段纯下3上储层进行评价。结果表明,东营凹陷王家岗油田王146区沙四上亚段纯下3上储层可划分为4种级别储层,所得评价结果与各层实际储量具有明显的正相关性,说明改进的AHP在储层综合评价中是科学、合理的,可满足碎屑岩储层有利区预测及开发要求。

In view of the strong subjectivity and inconsistent judgment matrix of traditional analytic hierarchy process(AHP),the calculation method of judgment matrix wasimproved.The influence of human subjectivity on evaluation results was weakened by means of mode and median,and the consistency of judgment matrix wasensured by using range method.An improved AHP method for comprehensive reservoir evaluation wasproposed and applied to evaluate the CX3upper reservoir in W146 area of Wangjiagang oilfield,Dongying depression.The evaluation results show that the CX3upper reservoir in the upper Es4formationof W146 area can be divided into four grades.The improved AHP is scientific and reasonable in reservoir comprehensive evaluation,and can meet the requirements of prediction and development of favorable areas of clastic reservoirs.