摘要
涠12-1海上油田注入富含SO42-的海水,地层水含大量二价金属离子,一些油井和地面管线结垢严重。垢样主要成分为硫酸钡、锶,含少量硫酸钙、碳酸亚铁。为此研制了钡锶垢防垢剂NYJH。在等量海水、地层水混合水中,加量30 mg/L的NYJH在90℃下防钡垢率为95.0%,防锶垢率为94.6%,用富含Ba2+、Sr2+的混配水饱和的岩心的渗透率保留率,注入2 PV加和不加NYJH的海水并在70-100℃放置后分别为93.5%-96.7%和85.6%-93.2%,注入5 PV加和不加NYJH的海水并在90℃放置后分别为>90%和80.6%,四轮次交替注入总量140 PV的加和不加NYJH的海水和混配水并在90℃放置后分别为88.7%和67.9%。在涠2-1油田注水站,以40 mg/L的加量在注入水中连续投加NYJH共20天,在2口油井监测,采出水中Ba2+Sr2+浓度迅速大幅上升并维持,停加8天后缓慢下降,表明NYJH对该油田井下钡锶垢的抑制能力很强。图4表3参6。
Offshore oil reservoir W12-1 is flooded by SO24 rich sea water and the formation water contains large amounts of divalent metal ions.In result severe scaling problems occur in some production wells downhole and in surface pipelines.The scale samples are composed of mainly barium/stronium sulfates and contain a little CaSO4 and FeCO3.To solve these problems,a inhibitor for Ba/Sr scaling,NYJH,is developed.In mixed sea and formation water in equal volume ratio at 90℃,a Ba scaling inhibition rate(SIR) of 95.0% ...
出处
《油田化学》
CAS
CSCD
北大核心
2006年第4期317-320,共4页
Oilfield Chemistry
关键词
防垢剂
钡锶盐垢
硫酸盐垢
防垢
井下结垢
涠12-1海上油田
scale inhibitor
barium/stronium salts precipitates
sulfates precipitates
scale inhibition
downhole scaling
offshore oil field W12-1
