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pH刺激响应型抗高温可逆转乳化剂研制与评价

王国帅 蒋官澄 贺垠博 董腾飞 杨俊 樊琳

王国帅,蒋官澄,贺垠博,等. pH刺激响应型抗高温可逆转乳化剂研制与评价[J]. 钻井液与完井液,2021,38(5):552-559 doi: 10.12358/j.issn.1001-5620.2021.05.003
引用本文: 王国帅,蒋官澄,贺垠博,等. pH刺激响应型抗高温可逆转乳化剂研制与评价[J]. 钻井液与完井液,2021,38(5):552-559 doi: 10.12358/j.issn.1001-5620.2021.05.003
WANG Guoshuai, JIANG Guancheng, HE Yinbo, et al.Synthesis and evaluation of a ph stimulus-responsive high temperature-resistant reversible emulsifier[J]. Drilling Fluid & Completion Fluid,2021, 38(5):552-559 doi: 10.12358/j.issn.1001-5620.2021.05.003
Citation: WANG Guoshuai, JIANG Guancheng, HE Yinbo, et al.Synthesis and evaluation of a ph stimulus-responsive high temperature-resistant reversible emulsifier[J]. Drilling Fluid & Completion Fluid,2021, 38(5):552-559 doi: 10.12358/j.issn.1001-5620.2021.05.003

pH刺激响应型抗高温可逆转乳化剂研制与评价

doi: 10.12358/j.issn.1001-5620.2021.05.003
基金项目: 国家自然科学基金项目(52004297, 51991361)、国家自然科学基金创新研究群体项目(51821092)
详细信息
    作者简介:

    王国帅,中国石油大学(北京)在读博士研究生,1995年生,现从事钻井液技术研究工作。电话 13011030519;E-mail:942338337@qq.com

    通讯作者:

    蒋官澄,教授。E-mail:jgc5786@126.com

  • 中图分类号: TE 254.4

Synthesis and Evaluation of A pH Stimulus-responsive High Temperature-resistant Reversible Emulsifier

  • 摘要: 针对油基钻井液在应用后期存在的滤饼难以清除和含油钻屑不易处理难题,基于pH刺激响应型乳化剂对乳状液类型的智能调控机制,以1-溴代长链烷烃R和二乙醇胺为原料,通过霍夫曼烷基化反应合成了一种pH响应可逆转乳化剂RE-HT,并以其为核心研制了一种抗高温可逆乳化钻井液。红外光谱分析和乳状液酸/碱触变实验结果表明,合成产物分子结构中含有pH响应性叔胺基团,可在酸/碱刺激下于油包水型乳化剂和水包油型乳化剂之间灵活切换,性能优于其余3种pH响应可逆转乳化剂。热重分析和电稳定性测试结果显示,RE-HT在空气氛围下的初始热分解温度高达257 ℃,含5%RE-HT的基础乳状液在220 ℃高温热滚后破乳电压达1098 V,表明其具有良好的热稳定性和乳化性能。研制的可逆乳化钻井液基础性能良好,在15%饱和盐水侵和15%泥页岩钻屑侵后依然可保持良好的流变与滤失性能,破乳电压高于850 V。同时酸洗后的滤饼清除率达98.98%,岩屑含油量低于1%,EC50为2.05×105 mg/L,满足钻屑排放标准,在复杂深井钻井中有较好的应用前景。

     

  • 图  1  可逆转乳化剂RE-HT的红外光谱图

    图  2  乳状液的酸触变(a)与碱触变(b)过程

    图  3  不同pH值 乳状液的水溶性

    图  4  RE-HT与其他3种pH响应可逆转乳化剂的热失重曲线(a)和微分热重曲线(b)

    图  5  老化温度对4种乳化剂配制的 基础乳状液电稳定性的影响

    表  1  乳化剂RE-HT理化性能与生物毒性

    ρ/
    g/cm3
    HLBCMC/
    mol/L
    γcmc/
    mN/m
    胺值/
    mgKOH/g
    EC50/
    mg/L
    0.9075.822.79×10−422.41575.68×105
      注:生物毒性检测中RE-HT浓度为5%
    下载: 导出CSV

    表  2  基于RE-HT的可逆乳化钻井液体系的基础性能

    测试
    条件
    钻井液
    类型
    AV/
    mPa∙s
    PV/
    mPa∙s
    YP/
    Pa
    Gel/
    Pa/Pa
    FLHTHP/
    mL
    ES/
    V
    pH
    热滚前油包水43.5367.673.0/3.510308.47
    热滚后油包水55.04114.315.5/6.54.410928.43
    酸触转相水包油61.54615.843.5/5.511.506.58
    碱触回转油包水59.04415.335.5/7.04.69138.52
      注:老化条件为180 ℃×16 h;流变与破乳电压测试温度为50 ℃;FLHTHP测试条件为180 ℃、3.5 MPa;酸触用酸为50% 乙酸水溶液;碱触用碱为20%NaOH水溶液
    下载: 导出CSV

    表  3  基于RE-HT的可逆乳化钻井液体系的抗温性能

    T老化/
    t老化/
    h
    AV/
    mPa∙s
    PV/
    mPa∙s
    YP/
    Pa
    Gel/
    Pa/Pa
    FLHTHP/
    mL
    ES/
    V
    1801655.04114.315.5/6.54.41092
    4849.03712.265.0/6.06.01073
    7246.53610.734.0/5.05.61017
    2001652.04012.265.0/6.08.4987
    2201646.0388.183.0/3.517.3937
      注:流变与破乳电压测试温度为50 ℃;FLHTHP测试条件为180 ℃、3.5 MPa
    下载: 导出CSV

    表  4  RE-HT配制的可逆乳化钻井液体系的抗污染性能

    污染
    条件
    测试
    条件
    AV/
    mPa∙s
    PV/
    mPa∙s
    YP/
    Pa
    Gel/
    Pa/Pa
    FLHTHP/
    mL
    ES/
    V
    5%饱和
    盐水
    热滚前50.53614.824.5/6.01072
    热滚后58.54315.845.0/6.04.6962
    10%饱和
    盐水
    热滚前52.03616.355.0/6.5965
    热滚后60.54416.865.5/6.55.6859
    15%饱和
    盐水
    热滚前61.04417.376.0/7.0950
    热滚后67.54819.936.5/8.05.4883
    10%泥页
    岩钻屑
    热滚前45.0378.183.0/3.51045
    热滚后56.04115.335.5/6.04.31078
    15%泥页
    岩钻屑
    热滚前46.5379.713.0/3.51145
    热滚后57.04116.355.5/6.54.71176
      注:老化条件为180 ℃×16 h;流变与破乳电压测试温度为50 ℃;FLHTHP测试条件为180 ℃、3.5 MPa
    下载: 导出CSV

    表  5  常规油基钻井液和可逆乳化钻井液滤饼清除率对比

    钻井液样品m0/gm1/gm2/gRr/%
    常规油基钻井液43.7645.3944.3464.42
    可逆乳化钻井液42.2045.1442.2398.98
      注:常规油基钻井液配方:255 mL 5#白油+3%主乳化剂+2% 辅乳化剂+3%有机土130D+3%CaO+2%微纳米封堵剂OSD-1+1.5%润湿剂+45 mL 25%CaCl2溶液+重晶石
    下载: 导出CSV

    表  6  常规油基和可逆乳化钻井液含油钻屑处理效果对比

    检测项目常规油基
    钻井液岩屑
    可逆乳化
    钻井液岩屑
    容许值
    酸洗前酸洗后酸洗前酸洗后一级海域
    含油量/%11.386.4212.130<1
    EC50/(mg·L−13.74×1042.05×105>3.0×104
      注:常规油基钻井液配方:255 mL 5#白油+3%主乳化剂+2%辅乳化剂+3%有机土130D+3%CaO+2%微纳米封堵剂OSD-1+1.5%润湿剂+45 mL 25%CaCl2溶液+重晶石
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-07-01
  • 录用日期:  2021-06-17
  • 刊出日期:  2021-10-01

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