钻采工艺 ›› 2022, Vol. 45 ›› Issue (2): 115-119.

• 油田化学 • 上一篇    下一篇

聚合物纳米微球封堵剂CQ-NSA性能研究

陶怀志1,2 陈俊斌1,2 1,2 3   

  1. 1 油气田应用化学四川省重点实验室   2 中国石油川庆钻探工程有限公司钻采工程技术研究院   3 中国石油川庆钻探工程有限公司安全环保质量监督检测研究院 
  • 出版日期:2022-03-25 发布日期:2022-04-28
  • 作者简介:陶怀志(1983-)博士,高级工程师,主要从事钻井液技术研发。
  • 基金资助:
    中国石油集团重大工程技术现场实验项目“页岩气长水平段井水基钻井液现场实验”(编号:2018F-21)。

Study on Property of Polymer Nanoparticle Blocking Agent CQ-NSA 

TAO Huaizhi1,2,CHEN Junbin1,2WANG Lan1,2,WU Qian3   

  1. 1. Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu, Sichuan 610500, China; 2. CCDC Drilling & Production Engineering Technology Research Institute, Guanghan, Sichuan 618300, China; 3. CNPC Safety and Environment Quality Supervision and Testing Institute Guanghan, Sichuan 618300, China

  • Online:2022-03-25 Published:2022-04-28

摘要:

针对页岩储层纳米级孔缝封堵的问题,研究了水基钻井液聚合物纳米微球封堵剂CQ-NSA的分散性、封堵性与配伍性。通过超声分散,其粒度中径为82.14 ;采用常规高速搅拌,17.5%的颗粒仍保持纳米级分布。将CQ-NSA加入膨润土浆中,总颗粒中仍有 6%的颗粒呈纳米级分布。CQ-NSA加量在1.0之间可以显著降 低滤饼渗透率!有效降低膨润土浆与体系配方的高温高压渗透封堵仪滤失量,表明CQ-NSA具有良好的封堵性能。流变性能分析结果表明,CQ-NSA加量不超1.5%,对膨润土浆与水基钻井液体系的流变性能影响不大,具有较好的配伍性能。该研究为页岩气水基钻井液用纳米封堵剂提供了理论与实验依据。

关键词:

聚合物, 纳米封堵剂, 分散性, 配伍性, 封堵性

Abstract:

Aiming at the problem of nanometer aperture sealing in shale reservoir, the property of dispersion, blocking and compatibility of polymer nanoparticle blocking agent CQ-NSA were studied. The particle diameter was 82. 14 nm by ultra sonic dispersion. Using conventional high-speed agitation,17.5% of the particles remained nanoscale distribution. When CQ-NSA was added into bentonite slurry, there were still 6% of the total particles in the nanoscale distribution. The dosage of CQ-NSA as blocking agent between 1.0% and 1.5% can significantly reduce the permeability of mud cake, effectively reduce the filtration loss measured by the PPA blocking tester of hentonite slurry and drilling fluid system, indicating that CQ-NSA has good blocking performance.The results of rheological analysis show that the dosage of CQ-NSA does not exceed 1.5% , which has little effect on the rheological properties of bentonite slurry and drilling fluid system, and has good compatibility. This study provided a theoretical and experimental basis for nanoparitical blocking agent used in water-based drilling fluid.

Key words:

polymer, nanoparticle blocking agent, dispersion, compatibility, blocking performance