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有些先期防砂井仍有出砂,不能正常生产。对于出砂严重的井,只有进行大修,将所有筛管起出,重新下入合适的筛管和重新填砂。本文介绍了辽河高升油田高2-2-072井的大修经过。一、洗井起抽油杆、油管和管内冲砂:冲砂钻具中加有一个φ130碟形阀座,目的是在冲完管内砂之后将阀座坐到铅封顶部,封住筛管内循环通道,便于管外冲砂;二、拔铅封及筛管;三、冲砂堵漏:为了防止堵塞油层,不能采取强行堵漏的方法,第一次采用聚合物泥浆堵漏,第二次采用亚麻油枯堵漏泥浆;四、电测井径和地层静压;五、下筛管冲砂。此井经过大修后,已投入正常生产,经过注汽热采,现日产量达35吨。
Some sand control wells still have sand, can not be normal production. For wells with severe sanding, only overhaul will be carried out, all screens shall be launched, re-placed in the appropriate screens and refilled. This article introduces the overhaul of 2-2-272 well in Liaohe Gaosheng Oilfield. First, wash well play sucker rod, tubing and pipe sand: red sand drill with a φ130 disc valve seat, the purpose is to flush the sand after the seat will sit on the top seal, seal screen Second, pull the seal and screen; Third, red sand plugging: In order to prevent plugging the reservoir, can not take a forced plugging method, the first use of polymer mud plugging, the second Second, the use of linseed oil plugging mud; Fourth, electrical caliper and formation hydrostatic pressure; After this well overhaul, has been put into normal production, after steam injection heat, the daily output of 35 tons.