油气藏增产措施优选的灰色决策方法研究

Grey Decision-making Method for Optimizing Reservoir Stimulation

油气藏增产措施优选是一个多目标决策问题。对该问题建立评价指标(即:措施投入、措施增油量、措施净收益、措施有效期、投资回收期、地质有效率、经济有效率、措施投入产出比、措施最低增油量)的相关矩阵,运用线性变换将相关评价指标转换成彼此独立的指标参数,并根据这些参数对总体特征的贡献率确定新指标权重,在新的评价矩阵和权重的基础上,应用灰色关联度决策方法对措施方案进行评价和优选,消除了指标相关性的影响,决策结果更为有效。

Optimizing the reservoir stimulation is an issue concerning multi-target decision. For solving the problem, the related matrix of evaluation indexes (that is the investment, oil increment, net income and validate period of the stimulation, investment payback, geologic efficiency, economic efficiency, input-output ratio and minimum oil increment of the stimulation) is established. Linear transformation is used to convert the related evaluation index into index parameters which is independent each other. Based on these parameters, new index weight is established for the contribution rate of overall characters. On the basis of new evaluation matrix and weight, grey decision-making method is used to evaluate and optimize the stimulation, by which the influence related with indexes is eliminated.