裂缝性火山岩气藏完井参数敏感性分析

Analysis of the sensitivity of completion parameters for fractured volcanic rock gas reservoirs

根据火山岩气藏气井的渗流规律,通过分析计算,总结了火山岩气藏裸眼完井、射孔完井、割缝衬管完井3种主要完井方式下不同参数对气井产能的影响规律,并利用某裂缝性火山岩气藏现场数据,对影响气井产能的主要完井参数进行了分析。研究表明,不同完井方式下各个完井参数对气井产能的影响不同,气井产能是这些影响因素综合作用结果;在优选完井参数时,应注意保护储层,防止污染,以取得最佳产量。该研究为进一步认识火山岩气藏,开展火山岩气井产能评价研究以及动态预测提供了技术依据。

Based on the seepage law in gas wells of volcanic gas reservoir, this paper studies the effect of completion parameters on gas well productivity under three well completion systems, which are open hole completion, perforated completion, and slotted liner completion. The main completion parameters affecting gas well productivity have been analyzed in conjunction with the field data of a fractured volcanic gas reservoir. The study shows that different completion parameters have different impact on gas well productivity, and gas well productivity is a result of the combined action of these factors. The completion parameters shall be optimized to protect reservoir and prevent contamination so as to achieve optimum production. This study provides technical basis for further understanding volcanic gas reservoirs, conducting productivity evaluation, and predicting the performance.