摘要
从胶体化学原理以及微观流体力学的角度分析了水基固相悬浮液分散稳定机理及流变性机理,并由此提出了高密度钻井液稳定性和流变性调控技术思路,指出通过采用特殊处理剂吸附在加重剂颗粒表面,增大其表面斥力是改善高密度钻井液稳定性和流变性的重要方法。优选出了一种润滑分散剂GR,评价了该处理剂对加重剂表面Zeta电位的影响,以及对钻井液悬浮性和流变性的影响。评价结果表明,该处理剂可增大加重剂表面Zeta电位,并能改善高密度水基钻井液的悬浮性和流变性。根据所提出的调控高密度钻井液的技术思路,以GR为关键处理剂,优选出了密度为2.80 g/cm3的水基钻井液,该体系具有良好的稳定性和流变性,从而验证了该调控思路的可行性。
Based on colloid chemistry and microscopic fluid mechanics,the mechanisms of dispersion stability and rheology of water base solid suspension emulsion are analyzed in this paper.A technical idea is developed that increasing the surface repulsion of weighting materials by some special absorption agents to improve stability and rheology of highdensity drilling fluid.The experimental results show that GR,a lubricating and dispersing agent,can increase the Zeta surface potential and improve stability and rtheology of high-density drilling fluid.By using the critical agent GR,a waterbase drilling fluid system with a density of 2.80 g/cm3 is developed which verifies the feasibility of the technology.
出处
《钻井液与完井液》
CAS
2011年第3期5-8,91,共4页
Drilling Fluid & Completion Fluid
关键词
高密度钻井液
悬浮稳定性
流变性
机理研究
High-density drilling fluid
Suspension stability
Rheology
Mechanism study
