Evaluation Method of Oilfield Stimulation Effect Based on Grey Relation Analysis with Combination Weighting

At present, most of the domestic oilfields have entered the middle and late stages of development, and it is usually necessary to take a variety of oilfield stimulation measures to maintain stable production, and the effects of oilfield stimulation measures need to be evaluated by evaluation indicators. The conventional grey relation analysis method uses the same evaluation index weight value to calculate, which cannot well reflect the evaluation index to the evaluation of the effect of oilfield stimulation measures. In this paper, an evaluation method based on combination empowerment grey correlation analysis for the effect of oilfield stimulation measures is proposed. For the evaluation indicators of oilfield stimulation measures, the subjective weights and objective weights of the evaluation indicators are respectively determined by the analytic hierarchy process and the entropy weight method, and the final weights of the evaluation indicators are obtained by comprehensive calculation. Then, the gray relation analysis method is used to calculate the correlation degree of oilfield stimulation measures, so as to obtain the evaluation results of the effect of oilfield stimulation measures. Compared with the traditional method, the evaluation results obtained by this method are more consistent with the actual situation of the oilfield.