模糊综合评价法在探井井控风险评价中的应用

APPLICATION OF FUZZY COMPREHENSIVE EVALUATION METHOD IN EXPLORATORY WELL CONTROL RISK EVALUATION

钻井过程中井控风险的影响因素往往不能定量化,常常采用一些比较模糊的语言给出风险程度的评语。模糊综合评价法是一种基于模糊数学的综合评标方法。利用模糊综合评价法的基本原理,建立了适合于油气井控风险评价的改进模糊综合评价法数学模型,利用西部某油田的探井实钻资料进行了井控风险评价,评价结果与实际风险表现基本吻合,表明改进的模糊综合评价法可以适用于探井井控风险评价。

The risk factors of well control in drilling have great uncertainty and the risk level has often been described with some vague language.Fuzzy comprehensive evaluation is a method based on fuzzing mathematics.This paper utilizes the basic principles of fuzzy comprehensive evaluation to establish a modified risk evaluation model which is suitable for the well control in drilling engineering.Based on researching drilling information of exploration wells from a western oil field,the model is used to evaluate the risk of well control.The performance evaluation results are basically consistent with the actual risks.This means that the modified fuzzy comprehensive evaluation method can be used to evaluate the risks of exploration well control.