Study On The Evaluation Method Of Deep Profile Control And Flooding Effect

Conclusion deep displacement technology domestic and foreign, affecting the oildisplacement effect of many factors to conduct a comprehensive analysis of screening, findout the factors influencing the displacement choose well indicators and divided into threetypes: reflect the injection water absorption capacity indicators; Reservoir heterogeneityindicator; Corresponding to oil well dynamic performance. Are the major factors affectedoil displacement well selected layer permeability and the relative percent water two aspects.Using fuzzy comprehensive evaluation method, to determine the single factor to choosewell layer of decision-making layer and multiple factors to choose well.To the first four deep displacement measures effect of water flooding law curveprediction, four kind of effect of water flooding law curve prediction include: cumulativewater rate, ultimate recovery and limit moisture content and moisture content of98%whenthe maximum recoverable reserves; Through four kinds of water flooding law curve of theforecast, to evaluate the deep displacement measures after each index provide a basis.Screen out deep displacement effect evaluation indicators, including evaluation ofinjection well and production well evaluation, block evaluation and economic evaluationfour aspects. Injection well evaluation index including injection well, injection pressuredrop curve well hole curve, injection well injectivity profile; Industry profile productionwell evaluation index including production Wells and increasing the oil production Wells;Evaluation including the block to add oil and enhance oil recovery; Economic input-outputratio as the main evaluation index, evaluation of deep displacement of economic effect, toconsider the price of crude oil changes, such as sensitivity analysis was carried out; Fordeep displacement development effect to carry on the comprehensive and systematicevaluation, choose the typical decline rate evaluation coefficient, water flooding reservesproducing degree evaluation coefficient, water use efficiency evaluation coefficient, waterabsorption index evaluation coefficient, pressure index evaluation coefficient, water cutrising rate evaluation coefficient, improve recovery efficiency evaluation coefficient and FDvalue evaluation coefficient; Deep displacement analysis summary both at home and abroadoilfield each index evaluation method and standard, by using the basic analysis of graysystem method to establish grey system comprehensive evaluation standard and weightcoefficient, make the deep displacement development effect evaluation from qualitative toquantitative, from the single index evaluation to multi-index comprehensive evaluation. On the basis of the theory and method research, deep displacement effect evaluationsoftware is compiled, the flooding effect in the depth of a sea follow-up evaluation.