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多分支井缓释自破胶完井液设计及性能

李超 黄玥 刘刚 罗健生 许明标 由福昌

李超, 黄玥, 刘刚, 罗健生, 许明标, 由福昌. 多分支井缓释自破胶完井液设计及性能[J]. 钻井液与完井液, 2021, 38(2): 218-225. doi: 10.3969/j.issn.1001-5620.2021.02.015
引用本文: 李超, 黄玥, 刘刚, 罗健生, 许明标, 由福昌. 多分支井缓释自破胶完井液设计及性能[J]. 钻井液与完井液, 2021, 38(2): 218-225. doi: 10.3969/j.issn.1001-5620.2021.02.015
LI Chao, HUANG Yue, LIU Gang, LUO Jiansheng, XU Mingbiao, YOU Fuchang. Design and Performance of a Slow-Release Self-Gel-Breaking Completion Fluid for Multilateral Wells[J]. DRILLING FLUID & COMPLETION FLUID, 2021, 38(2): 218-225. doi: 10.3969/j.issn.1001-5620.2021.02.015
Citation: LI Chao, HUANG Yue, LIU Gang, LUO Jiansheng, XU Mingbiao, YOU Fuchang. Design and Performance of a Slow-Release Self-Gel-Breaking Completion Fluid for Multilateral Wells[J]. DRILLING FLUID & COMPLETION FLUID, 2021, 38(2): 218-225. doi: 10.3969/j.issn.1001-5620.2021.02.015

多分支井缓释自破胶完井液设计及性能

doi: 10.3969/j.issn.1001-5620.2021.02.015
基金项目: 

南海东部油田重大科技专项“复杂海相砂岩油藏挖潜关键技术研究”(CNOOC-KJ 135 ZDXM 37 SZ 03 SZ)

详细信息
    作者简介:

    李超,工程师,硕士,1989年生,毕业于山东大学,现在从事钻井液工艺技术方面研究工作。电话18800021676;E-mail:lichao46@cosl.com.cn

  • 中图分类号: TE257.6

Design and Performance of a Slow-Release Self-Gel-Breaking Completion Fluid for Multilateral Wells

  • 摘要: 多分支井缓释自破胶完井液是一种新型井筒工作液,凭借其特殊的储层自破胶能力,可使完井施工避免常规酸化与破胶工序,是衔接后续裸眼砾石充填作业的重要技术体系。结合南海恩平油田多分支井储层特征,分析了缓释自破胶完井液的设计原理,筛选并表征了流型调节剂高丙酮酸黄原胶,并检测了构建缓释自破胶完井液的破胶效果与储层保护性能。研究结果显示,基于核心处理剂黄原胶大分子与完井液自破胶性能间的构效关系,结合破胶与护胶协同作用,建立了缓释自破胶完井液的设计方法;制备的丙酮酸改性黄原胶分子量为8.0×106,丙酮酸基含量达7.9%;与常规黄原胶相比,高丙酮酸黄原胶的构象转换温度及热稳定性均显著下降,且无温度阈值,具有较好缓释降解性;对构建缓释自破胶完井液体系,通过高丙酮酸黄原胶与护胶剂联用方式调节完井液自破胶效能,使破胶时间在5~17 d;自破胶后完井液对孔隙无封堵,岩心渗透率恢复平均值达到90.36%±0.23%,储层保护效果良好。

     

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  • 收稿日期:  2020-10-24

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