CAJ | 학술논문

目前，注水井酸化主要采用常规酸化模式，但常规酸化存在酸化作业时间长、作业程序复杂、作业环境要求高、动复原复杂和协调难度大等问题。针对这些问题，提出一种单步法在线酸化技术。该技术的核心是采用一种高效酸液体系代替常规酸化三段式液体，实现“以一代三”功效。因此，开展了新一代单步法酸液体系—G智能复合酸液体系的研究，主要包括酸液体系与注入水、采出水配伍性、抑制沉淀、缓速、缓蚀性能、酸化流动效果评价及微观分析。结果表明，G‐智能复合酸液能够满足单步酸液体系的性能要求，酸液体系与注入水最优混配体积比在1∶2～1∶8。微观电镜分析表明，酸液不会破坏岩石骨架。将该酸液体系应用于渤海油田B4注水井在线单步法酸化，酸化后该井的视吸水指数大幅度升高，降压增注效果显著。
목전，주수정산화주요채용상규산화모식，단상규산화존재산화작업시간장、작업정서복잡、작업배경요구고、동복원복잡화협조난도대등문제。침대저사문제，제출일충단보법재선산화기술。해기술적핵심시채용일충고효산액체계대체상규산화삼단식액체，실현“이일대삼”공효。인차，개전료신일대단보법산액체계—G지능복합산액체계적연구，주요포괄산액체계여주입수、채출수배오성、억제침정、완속、완식성능、산화류동효과평개급미관분석。결과표명，G‐지능복합산액능구만족단보산액체계적성능요구，산액체계여주입수최우혼배체적비재1∶2～1∶8。미관전경분석표명，산액불회파배암석골가。장해산액체계응용우발해유전B4주수정재선단보법산화，산화후해정적시흡수지수대폭도승고，강압증주효과현저。
At present ,conventional acidification is the main pattern for injection wells .However , there are some problems existing in conventional acidification operation for several times ,such as large equipment footprint ,long operation time ,difficult in treatment coordination and negative impact on water injection and production caused by repetitive acidizing .To solve these problems ,a single step online acidification technology was proposed .The core of the technology is using a single kind of acid which has efficient ability to replace the three‐step conventional acid .Thus ,a series of research on new single step acid system (G intelligent integrated acid) were carried out ,mainly including com‐patibility performance with injected water and produced water ,precipitation inhibition ,slow reaction , corrosion inhibition ,effect evaluation of acidification and microscopic analysis .T he results show that G intelligent integrated acid could meet the performance requirement of the single step acid system , the optimal mixed proportion with injected water is 1∶2~1∶8 .SEM analysis indicated that acid could not destroy the rock skeleton ,and energy spectrum analysis result showed that acid could effi‐ciently chelate metal ion .G intelligent integrated acid system has been applied in B4 water injection wells in Bohai Oilfield for online single step acidizing and the technology increased water injectivity in‐dex significantly of B4 well ,effect of reducing injection pressure and enhancing productivity is re‐markable ..