Effect of Three New High Temperature Filtrate Reducers on Particle Size Distribution of Drilling Fluid
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摘要: 降滤失剂作用机理的研究对高温深井钻井液的应用有着指导性的意义,对照传统钻井液降滤失剂综合评价3 种新型抗高温降滤失剂Redul-200、JNJS-220 以及CPF 的性能。3 种新型降滤失剂较传统降滤失剂SMP-1、SMP-2、SMP-3、PSC-2 及SPNH 有着良好的降滤失性能和流变性。通过分析钻井液体系的粒度分布来研究这3 种新型降滤失剂的作用机理。降滤失剂Redul-200 是一种聚合物和惰性固相颗粒的混合物,降滤失剂JNJS-220 中含有亚微米级固相颗粒,降滤失剂CPF 拓宽了钻井液固相颗粒粒径分布范围(亚微米级～100 微米级)。通过在2 口风险探井施工中的应用,这3 种新型降滤失剂有效地控制了滤失量,保证盲区地层施工顺利进行。Abstract: Three new filtrate reducers, REdul-200, JNJS-220 and CPF were evaluated against conventional filtrate reducers, such as SMP-1, SMP-2, SMP-3, PSC-2 and SPNH, for their mechanisms of action in reducing high temperature filtration. Study on the particle size distribution of the drilling fluids treated with these filtrate reducers shows that Redul-200 is a mixture of polymer and inert solid particles, JNJS-220 contains submicron solid particles, while CPF contains solid particles that have wider size distribution (from submicron to a hundred microns). Field application shows that the new filtrate reducers have better filtrate reducing performance and better rheology than the conventional filtrate reducers mentioned above.
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Key words:
- Drilling fluid /
- Filtrate reducer /
- Solid particle /
- Particle size distribution /
- Mechanism of action
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