注水井解堵措施综合评判技术与应用

针对东辛油田注水井解堵措施应用选择针对性差的问题,应用模糊变换原理和最大隶属度原则,建立了注水井解堵措施应用选择模糊综合评判模型,并研发了计算软件.它考虑了与解堵措施效果相关的各个主要因素及其与效果指标间的数学关系,利用现场资料统计分析的方法,构造一级评判矩阵,利用专家打分法确定评判的权数集.经东辛油田2002~2005年注水井应用解堵措施的206井次的验证,符合率为86.41%.对20口注水井采用模糊综合评判法预测与评判的处理措施效果与实际应用处理后的效果等级符合率达到90%.因此,本研究有利于提高不同类型处理措施的应用针对性和有效性,减少处理效果差的措施应用所造成的作业工作量和施工费用,提高了注水井解堵措施工作质量和油田开发效益.

The fuzzy comprehensive evaluation of plug-releasing for injection wells

Based on the worse pertinence of plug-releasing application for injection wells in Dongxin oilfield,the practical fuzzy comprehensive evaluation model is built and the calculating software is developed to select the plug-releasing measures using the fuzzy transform and the maximum subordination principle.The mathematical relationship between the main factors and the effect of the plug-release is taken into account in the model.The primary evaluation matrix is constructed by using the statistical method and the evaluation weighting coefficient is obtained by experts marking.The study shows that the coincidence ratio is 86.41% and the 20 results are basically identical between the calculation and the application.Accordingly,the application pertinence and validity of the plug-releasing measures are increased and the operation capacity and cost created by the poor application are decreased.Therefore the study can improve the quality of the plug-releasing treatments and the benefit of the oil field exploitation.