Study On Multi-attribute Evaluation Support System For Oil Well Stimulation Measures Effect

At present, the majority of oil fields in our country have stepped into middle-late Stage of waterflooding development, and it is more and more difficult to be recovered. Under this condition, a set of effective stimulation of production wells is needed to obtain a better benefit. Well stimulation evaluation is the premise of correct decision-making, therefore of great practical significance. Well stimulation evaluation refers to many factors such as technique, economic, society, in view of the question of multi-attributed evaluation of well stimulation effect and under the rule of establishment of evaluation index, has established a scientific and reasonable evaluation system of index of individual measure effect and an evaluation system of index of special management measure effect from three aspects of technical effect, economic benefit and social benefit using Delphi survey analysis method. At the same time computing method and highlight of analysis is proposed uniting with industry standards making all indexes operable in practice, and then according to the principle and requirements of evaluation methods, select fuzzy comprehensive evaluation method based on the analytic hierarchy process(AHP-FCE)as an evaluation model; Study relative research aboat AHP-FCE, which utilizes 1～9 scale law in AHP to decide weights and adopts fuzzy statistical cut-and-try method to determine degree of membership.This method combines qualitative analysis with quantitative one,and integrates personal experience and judgments with mathematical operation,which circumscribes person's subjective factor into minimum range to guarantee the correctness of evaluation result;According to the associative analysis principle of grey theory,a gray associative analysis method applied in stimulation optimizing is established. The results show that this method is simple, reliable, and it is an ideal evaluation method; Multi-attribute evaluation support system for oil well stimulation measures effect is designed and developed in fundamental research foundation. Research theory, method and calculation software is certified with information of 50 treat well in xia'ermen oil field of 2007, and the results show the feasibility and accuracy of evaluation theories and methods. Meanwhile, This system has realized scientific, rapid, and efficient of evaluation, and providing a platform to support decision-making for decision makers.