石油勘探与开发 >

2021 , Vol. 48 >Issue 5: 1014 - 1022

DOI: https://doi.org/10.11698/PED.2021.05.13

油气田开发

胺型乳状液的二氧化碳、氧化钙响应行为及应用潜力

  • 任妍君 ,
  • 路岩岩 ,
  • 蒋官澄 ,
  • 周文静 ,
  • 伍连松 ,
  • 姚如钢 ,
  • 谢水祥
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  • 1.西南石油大学石油与天然气工程学院,成都 610500;
    2.中国石油大学（北京）石油工程学院,北京 102249;
    3.中国石油集团长城钻探工程有限公司钻井液公司,北京 100101;
    4.中国石油集团安全环保技术研究院,北京 102206
任妍君（1984-）,女,河南焦作人,博士,西南石油大学讲师,主要从事油气井工作液、储集层保护方面的研究。地址：四川省成都市新都区新都大道8号,西南石油大学石油与天然气工程学院油气井工程专业,邮政编码：610500。E-mail: yanjun_Ada@163.com

收稿日期: 2020-12-09

  网络出版日期: 2021-09-17

基金资助

国家自然科学基金资助项目“高温深井油基钻井液可逆特性与CO2/N2诱导机理研究”（51804263）; 中国石油-西南石油大学创新联合体科技合作项目子课题“降低长水平段井下复杂与事故的配套技术”（2020CX040201）、“深井复杂地层井下复杂情况预防及对策研究”（2020CX040102）

收起

CO2/CaO-responsive behavior and application potential of amine emulsion

  • REN Yanjun ,
  • LU Yanyan ,
  • JIANG Guancheng ,
  • ZHOU Wenjing ,
  • WU Liansong ,
  • YAO Rugang ,
  • XIE Shuixiang
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  • 1. Petroleum Engineering School, Southwest Petroleum University, Chengdu 610500, China;
    2. Petroleum Engineering School, China University of Petroleum, Beijing 102249, China;
    3. GWDC Drilling Fluids Company, Beijing 100101, China;
    4. CNPC Institute of Safety and Environmental Protection Technology, Beijing 102206, China

Received date: 2020-12-09

  Online published: 2021-09-17

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摘要

采用绿色、低廉的CO2/CaO刺激诱导胺型乳状液,在揭示该乳液体系响应行为规律的基础上,构建CO2/CaO响应性油基钻井液并评价其性能。研究表明,在CO2诱导下胺型乳状液易从油包水逆转为水包油,同时其黏度经历了降低、回升、降低的规律性迁移,上述CO2响应行为可由CaO诱导回转。基于胺型乳状液构建的油基钻井液,在油水比50∶50至70∶30,密度1.4~2.0 g/cm3及温度160 ℃条件下均具有良好的流变和滤失性能,且可被CO2鼓泡清洗,可由CO2诱导大幅降黏并有效清除低密度无用固相,所余液相可由CaO诱导回用。机理分析表明,CO2/CaO诱导胺型乳化剂与其胺盐之间可逆转换,使乳化剂亲油亲水平衡性可逆调节、乳状液粒径可逆增减,是胺型乳状液类型、流变性可控可逆的根本原因。图14表2参33

关键词： 油基钻井液; 胺型乳状液; CO2/CaO响应; 乳化逆转; 诱导回转; 回收利用

本文引用格式

任妍君 , 路岩岩 , 蒋官澄 , 周文静 , 伍连松 , 姚如钢 , 谢水祥 . 胺型乳状液的二氧化碳、氧化钙响应行为及应用潜力[J]. 石油勘探与开发, 2021 , 48(5) : 1014 -1022 . DOI: 10.11698/PED.2021.05.13

Abstract

Green and low cost CO2 and CaO were used to stimulate amine emulsions to reveal the responsive behavior of amine emulsions. On this basis, oil-based drilling fluids responsive to CO2 and CaO were formulated and their properties were evaluated. The results showed that the amine emulsions inversed from water-in-oil state to oil-in-water state readily and their rheological behavior underwent transitions of decreasing, rising again and decreasing again via induction by CO2. These CO2 responsive behaviors could be reversed by CaO. Oil-based drilling fluids prepared based on the amine emulsions with oil-water volume ratios of 50:50 to 70:30, densities of 1.4-2.0 g/cm3 had good rheological and filtration properties at 160 ℃; and be readily cleaned up using CO2 bubbling. The useless solid phase with low density could be removed efficiently via reducing the viscosity of emulsion by CO2 and the residual liquid phase could be restored to the original state by CaO and reused to prepare drilling fluid. The mechanisms analysis indicated that CO2/CaO induced the reversible conversion between amine emulsifiers and their salts, which enabled the reversible regulation of both the hydrophilic-lipophilic balance of amine emulsifiers and the emulsion particles’ size and finally caused the controllable-reversion of the form and rheology of amine emulsion.

Key words： oil-based drilling fluid; amine emulsion; CO2/CaO response; emulsion inversion; controlled reversible property; recycling

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