注下采上工艺技术

Technique of Lower-Layer Injection and Upper-Layer Production

为满足单井同时注采的需要,进行了注下采上工艺技术的研究。该技术可根据注下采上工艺及单井井况的需要,将管柱设计为机械封隔式双卡管柱及液压封隔式双卡管柱;确立了相应的施工工艺,并研制出转换器、插入密封总成、压差式油套连通阀、过桥泵等配套工具。现场应用表明,注下采上技术能实现一口井同时注采生产,提高了油井利用率。

To meet the demand of a well simultaneous injection and production, lower-layer injection and upper-layer production technology was developed. According to different Technical demand, this kind of string can be designed as mechanical packer isolated interval string and hydraulic packer isolated interval string. The new technology procedure is also established. Moreover, the transformer, plug in seal assemble, pressure-differential communicating valve and across bridge pump are developed. The result of on site tests on 16 wells shows that the technology could simultaneous realize production and injection of a well, and raise the utilization rate of well.