非均质油藏暂堵酸化技术研究及应用

RESEARCH & APPLICATION OF TEMPORARY PLUGGING AND ACIDIZATION TECHNIQUE IN ANISOTROPISM RESERVOIRS

针对油井酸化措施后,出现的在增油的同时油井含水大幅度上升的问题。通过分析,揭示了酸化只对高渗带的油层物性得到改善,而油层的低渗带的物性得不到相应的改善,根据这一情况,提出了暂堵酸化工艺技术,通过现场试验及应用,取得了较好的控水增油效果,丰富了低渗透油田油井酸化工艺技术,对于开发低渗透油田,延长油田低含水采油期,具有重要的现实意义。

According to the?problem of water-cut increasing in simulation after acid treatment, the paper analyzed the action of acidization. The results showed that the acid treatment only improved the physical properties of oil layer in the high permeable reservoir, except in the low-permeable reservoir. In this instance, temporary plugging acidizing technique were used. Through field application, preferable effect in oil stimulation and water control were obtained, the acidizing technology of low permeability oilfield was improved, and the low water-cut recovery period was prolonged in Yanchang oil field.