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渤海油田油井酸化返排液固悬物含量分析

邹剑,  黄利平,  赵鹏,  杨淼,  高尚

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文章导航 > 钻井液与完井液  > 2020 >  37(4): 536-540
邹剑, 黄利平, 赵鹏, 杨淼, 高尚. 渤海油田油井酸化返排液固悬物含量分析[J]. 钻井液与完井液, 2020, 37(4): 536-540. doi: 10.3969/j.issn.1001-5620.2020.04.022
引用本文: 邹剑, 黄利平, 赵鹏, 杨淼, 高尚. 渤海油田油井酸化返排液固悬物含量分析[J]. 钻井液与完井液, 2020, 37(4): 536-540. doi: 10.3969/j.issn.1001-5620.2020.04.022
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ZOU Jian, HUANG Liping, ZHAO Peng, YANG Miao, GAO Shang. Analysis of the Content of Solid Suspended Matter in Acid Fracturing Flowback Fluids from Oil Wells in Bohai Oilfield[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(4): 536-540. doi: 10.3969/j.issn.1001-5620.2020.04.022
Citation: ZOU Jian, HUANG Liping, ZHAO Peng, YANG Miao, GAO Shang. Analysis of the Content of Solid Suspended Matter in Acid Fracturing Flowback Fluids from Oil Wells in Bohai Oilfield[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(4): 536-540. doi: 10.3969/j.issn.1001-5620.2020.04.022
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渤海油田油井酸化返排液固悬物含量分析

doi: 10.3969/j.issn.1001-5620.2020.04.022

  • 1. 中海石油(中国)有限公司天津分公司渤海石油研究院, 天津 300459;

  • 2. 中海油能源发展股份有限公司工程技术分公司, 天津 300452

基金项目: 

国家科技重大专项子课题“渤海油田油井酸化返排液处理基础研究及示范”（2016ZX05058-003-016）

详细信息
    作者简介:

    邹剑,1969年生,高级工程师,1992年毕业于西南石油学院石油地质专业,现从事油田开发、采油工艺研究和技术管理工作。E-mail:zoujian@cnooc.com.cn

    通讯作者:

    黄利平,1982年生,高级工程师,电话18702232968

  • 中图分类号: TE357.12

Analysis of the Content of Solid Suspended Matter in Acid Fracturing Flowback Fluids from Oil Wells in Bohai Oilfield

  • 1. Oil Production Technology Research Institute of Tianjin Bohai Oilfield Institute, CNOOC(China) Co. Ltd. Tianjin Company, Tianjin 300459;

  • 2. CNOOC Energy Development Ltd. Engineering Technology Company, Tianjin 300452

    摘要
  • 摘要: 针对渤海油田油井酸化返排液简易处理后回注造成的回注井堵塞问题，分析了渤海油田现场三口油井酸化返排液的固悬物含量，并通过改变酸碱环境，进一步分析了酸碱环境对酸化返排液中固悬物含量的影响。实验表明，不同单井、单井不同返排周期返排液中固悬物含量差异明显，酸碱环境对固悬物含量影响很大，加碱中和后的酸化返排液中会产生大量的Fe（OH）3沉淀。室内填砂管动态驱替实验表明，去浮油后的pH值为1~2的酸化返排液，不会对填砂管造成明显堵塞。现场施工过程中，酸化返排液应避免加碱中和，同时使用盐酸体系降低返排液pH值，可有效减少返排液中固悬物含量，降低回注井近井堵塞风险。

     

    Abstract: Acid fracturing flowback fluids produced in Bohai oilfield, after simple treatment, were reinjected into the formation. The fracturing flowback fluids always caused the injectors to be blocked because of the existence of solid suspended matter in the fracturing flowback fluids. Laboratory experiments were conducted for the suspended solid matter on three fracturing flowback fluid samples taken from oil wells in Bohai oilfield. The effect of pH on the content of suspended solid matter in the acid fracturing flowback fluids was analyzed by changing the pH value of the fracturing fluids. The experimental results showed that the content of the suspended solid matter in fracturing flowback fluids from different wells and the content of suspended solid matter in the fracturing flowback fluid from a single well in different time of flowback are quite different. pH value plays an important role in the content of the suspended solid matter. Large amount of Fe(OH)3 precipitate is produced in acid fracturing fluid neutralized with bases. Dynamic displacing test through sandpack tube showed that de-oiled acid fracturing flowback fluid with pH 1 – 2 does not cause obvious block in the sandpack tube. It is thus understood that in field operation, the acid fracturing flowback fluid should not be neutralized with bases. If HCl is used to reduce the pH value of the fracturing flowback fluid, the content of the suspended solid matter in the fracturing fluid can be effectively decreased, hence reducing the risk of near-wellbore blocking in injectors.

     

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出版历程
  • 收稿日期:  2020-04-20
  • 刊出日期:  2020-08-28

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