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抗盐高性能水泥浆体系研究与应用

丹美涵

丹美涵. 抗盐高性能水泥浆体系研究与应用[J]. 钻井液与完井液, 2021, 38(2): 249-254. doi: 10.3969/j.issn.1001-5620.2021.02.020
引用本文: 丹美涵. 抗盐高性能水泥浆体系研究与应用[J]. 钻井液与完井液, 2021, 38(2): 249-254. doi: 10.3969/j.issn.1001-5620.2021.02.020
DAN Meihan. Study and Application of a High-Performance Salt-Resistant Cement Slurry[J]. DRILLING FLUID & COMPLETION FLUID, 2021, 38(2): 249-254. doi: 10.3969/j.issn.1001-5620.2021.02.020
Citation: DAN Meihan. Study and Application of a High-Performance Salt-Resistant Cement Slurry[J]. DRILLING FLUID & COMPLETION FLUID, 2021, 38(2): 249-254. doi: 10.3969/j.issn.1001-5620.2021.02.020

抗盐高性能水泥浆体系研究与应用

doi: 10.3969/j.issn.1001-5620.2021.02.020
详细信息
    作者简介:

    丹美涵,工程师,1987年生,硕士毕业于南开大学高分子化学专业,主要从事钻采技术与工程规划研究。E-mail:danmh@cnooc.com.cn

  • 中图分类号: TE256.6

Study and Application of a High-Performance Salt-Resistant Cement Slurry

  • 摘要: 伊拉克米桑油田井底普遍存在高压盐膏层,由于盐层蠕变致使井径缩小、冲蚀和溶解盐层导致水泥浆含盐量越来越高、密度窗口窄、顶替效率低等难点给固井质量带来挑战。针对目前常用的半饱和NaCl溶液或者(3%~5%) KCl溶液配浆存在的水泥石抗压强度低,界面胶结差的问题,优选含有25% NaCl和5% KCl高盐混合水配制水泥浆,配套抗盐降失水剂、分散剂、缓凝剂等外加剂,解决了因高盐混合水配浆可能带来的水泥浆增稠、触变等问题,构建了一种抗盐高性能水泥浆体系。室内研究表明,该套水泥浆体系能抑制盐的溶解,配制密度为2.39 g/cm3的水泥浆,最低只需加入30%铁矿粉,在降低水泥浆成本的同时大幅度提高了水泥石的抗压强度,使其24 h抗压强度可达48 MPa,较目前应用水平提高近一倍;水泥浆污染后24 h强度依然大于14 MPa,能够保证米桑油田盐膏层固井质量,可在伊拉克米桑油田推广应用。

     

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  • 收稿日期:  2020-12-11

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