水力喷射重复压裂工艺在西峰油田三叠系中高含水井的应用

Application of hydraulic jet refracturing technology in high water-cut wells of Triassic of Xifeng Oilfield

针对西峰油田三叠系某区块定向井产能衰减较快,中高含水井比例逐年增加的现状,开展了水力喷射重复压裂工艺技术研究。根据现有水力喷射压裂技术特点和该区块中高含水油井的具体情况,进行水力喷射压裂适用性分析,以及喷射压裂参数优化等相关技术研究,通过现场试验,应用效果达到了降水增油的目的,单井平均日增油1.73 t,平均含水下降15.4%,形成适应于西峰油田中高含水油井的水力喷射重复压裂工艺技术。

Aiming at the problems of the rapid productivity decline of directional wells and the proportion of medium-high water-cut wells increased by years in a certain block of Triassic of Xifeng Oilfield,it was carried out studies on the hydraulic jet refracturing technology.According to the technical characteristics of existing hydraulic jet fracturing and the practical situation of medium-high water-cut wells in the block,it was implemented studies on the applicability of hydraulic jet fracturing and the optimization of fracturing parameters.The results of field test showed that it was obtained the increasing oil production and decreasing water-cut,having the average daily increased oil production per well of 1.73 tons per day and the average decreased water cut of 15.4%.So the formed hydraulic jet refracturing technology is suitable for medium-high water-cut wells in Xifeng Oilfield.