让纳若尔油田重复酸压选井选层方法研究及应用

摘要

There are more than 550 producing well in Zanarol Oilifeld, of which nearly 60 percent of acid fractured wells have lost effectiveness, and need repeated stimulation. Candidate well selection is one of the key links which affects the re-fracturing effect. Based on the theory research of well selection methods, according to reservoir characteristics of Zanarol oilifeld and stimulated well performance, production statistics, virtual intelligence and production prediction technique have been used to build repeated acid fracturing well selection model, a new way to select carbonate reservoirs and wells. Oilifeld application shows this comprehensive method increased the effective ratio of re-stimulation, productivity and producing degree of single well have been increased by using different re-fracturing technique, playing an important role in keeping the production stable in Zanarol oilifeld.%让纳若尔油田生产井经过酸压改造后其中60%的油井经过多年生产已经失效需要进行重复改造，而选井选层是关系重复改造效果的关键环节。基于国内外选井选层理论方法研究，针对让纳若尔油田的储层特征条件、以往300余口井改造效果分析以及阿克纠宾酸压井的生产现状，通过产量统计法、人工神经网络法和重复改造产能预测分析建立重复酸压选井模型，形成碳酸盐岩储层选井选层新方法。现场应用表明，综合选井选层方法进一步提高了酸压改造有效率，提高了单井产能和动用程度，有利于让纳若尔老油田持续稳产。