摘要：Foam drainage gas production is an important operation method in the development of natural gas wells. The evaluation of foam drainage gas recovery effect involves many factors, which is a multi-standard judgment problem. The existing foam drainage gas production lacks a systematic evaluation method. In view of this problem, in this paper, we propose a fuzzy comprehensive evaluation method of drainage gas recovery effect based on entropy method. According to the characteristics of the outlet gas well and the foam drainage gas production well, an evaluation index of the foam drainage gas production effect of the gas well was constructed using the production data. This method considers the correlation between the evaluation indexes of gas well drainage and gas recovery effects. A linear analysis method is used to establish the membership matrix, and the entropy method is used to determine the index weight. Finally, combined with the fuzzy comprehensive evaluation method, the comprehensive evaluation index of the gas well foam drainage gas recovery effect was calculated. This method overcomes the shortcomings of traditional methods in determining weights, and can better resolve the ambiguity of hierarchical boundaries. Moreover, this method avoids the interference of human subjective factors and makes the evaluation results more objective.
关键词：Natural gas development;foam drainage gas production;entropy method;fuzzy comprehensive evaluation;comprehensive evaluation index
