Application of hydraulic expansion in wells which failed in waterflood
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摘要: 塔河油田缝洞型碳酸盐岩油藏目前主要采用注水替油的方式来提高采收率。随着注水替油工作的不断开展,注水失效井逐步增多,如何挖掘失效井潜力成为当务之急。从失效原因分析入手,在总结常规失效治理手段的基础上,提出了水力扩容的思路来进一步对剩余储量进行挖潜,提高储量动用程度,同时初步确定了水力扩容有利井选井条件。Abstract: In fracture-cave carbonate reservoirs of the Tahe Oil Field,waterflood substituting oil(WSO) has been used as the main method to improve recovery rate.As explorations are carried out,wells which have failed in WSO increase.It is necessary to tap potential of the failed wells.Analyzingthe reasons for failure,based on conclusions of conventional treatment methods which had failed in theabove-mentioned wells,hydraulic expansion(HE) was proposed to tap potential and improve recovery.Selecting standard for wells using HE was put forward.
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