综合测试结果在完井酸化选井中的应用

Application of Integrated Test Results on Completion-Acidizing Candidate Well Selection

低渗气藏完井酸化效果差异大或措施不见效主要在于措施前缺乏正确的选井决策。基于影响酸化效果的因素分析,将综合测试结果用于酸化选井,借助模糊系统理论方法对不同测试参数结果归一化,实现了酸化选井的量化评价。提出了影响酸化效果的11项影响因素及层次,计算了各因素权重;通过实例阐述了该选井方法的具体应用。分析表明,在一定单井含气量的前提下,酸化前测试储层物性特征参数对酸化效果影响甚小,而产能特征是影响措施效果的关键。该研究为完井酸化选井提供了指导性依据,确保了完井酸化效果及措施效率。

Results of completion-acidizing are very different in most of low-permeability gas reservoirs,sometime is even very,very far from the expected effect;and the major reason of which is incorrect selection of candidate wells.Based on the analysis of factors affecting acidizing result,we use the integrated test results in acidizing candidate well selection and normalize different test results in virtue of fuzzy system theoretical method to accomplish the quantitative evaluation for acidizing candidate well selection.This paper gives 11 influence factors of acidizing result and calculates the relevant weight of each factor.The application of this method is described by a field example.The analysis shows that the productivity characteristics are the key influence factors on acidizing effect.The research provides an instructive basis on completion-acidizing candidate well selection,and therefore makes sure both the effect and the efficiency of completion-acidizing.