Research On Prediction Method Of Cementing Quality

The cementing quality is the foundation of quality of well completion, which concerns the life of oil/gas well and stimulation treatment or development measures to effectively implemented. The cementing is one-time project and concealed works, there is no effective remedy measures if the cementing quality have problems.In order to improve the cementing quality, obtain high-quality cement sheath, making predictions along the cementing, which provide basis for the cementing scheme improved and perfected Combined with the engineering practice and applied reliable mathematical method which predict the cementing quality, inspect cementing operation feasibility of the design and optimize cementing operation parameters. On based of the analysis of the system, This article mainly researches on the application of fuzzy mathematic theory that predict the method of cementing quality.There are many factors that affects the cementing quality, the factors can be divided into four categories through analysis systematically:the effect of wellbore on cementing quality, the efficiency of replacement of the slurry to the cementing quality, the influence of pressure stable coefficient and strengthen technological measures to the influence of the cementing quality. Based on the influence factors and the evaluation factors, established the evaluation of the cementing quality of many factors prediction method form using fuzzy evaluation method and hierarchical analysis method. Determined the sub-factors criteria based on the existing study and field experience. Using hierarchical analysis and expert judgment of the two methods to give values of the weight of the node, established a fuzzy model to predict the cementing quality, and formed the prediction software, which convenient for forecasting cementing quality effectively, On this basis optimizing the cementing parameters constantly, and develop reasonable and effective solutions for cementing...