低(无)荧光惰性降滤失剂DJ-3的实验研究

为了兼顾探井、生产井(开发井)和环境保护等要求,以直链饱和烃为原料,采用分散与聚集相平衡原理,研制成功了低(无)荧光、低(无)毒的钻井液惰性降滤失剂DJ-3。对DJ-3在淡水、正电胶和高密度盐水泥浆中的作用效能进行了综合评价,并与磺化沥青进行了对比实验。结果表明,DJ-3惰性降滤失剂具有良好的降失水、润滑、防塌、封堵能力,抗温能力强(150℃以上)、抗盐能力强(7%NaCL+7%KCOOH),与疏水缔合聚合物AP-P1、甲酸钾等处理剂配伍性好,并在高温(150℃)高密度(ρ=2.0 g/cm³)泥浆体系中表现出良好的降滤失效果和改善流变性能力;它是正电胶MMH泥浆体系中可取的降滤失剂,且无荧光、低(无)毒,其整体效果明显优于磺化沥青HL-Ⅱ、SAS,是磺化沥青的看好替代品。

EXPERIMENTAL STUDY ON LOW FLUORESCENT OR NON-FLUORESCENT INERT FILTRATION REDUCER DJ-3

In order to meet needs of exploratory well, development well and environmental protection, an inert filtration reducer DJ-3 which is low fluorescent or non-fluorescence and low poisonous or non-poisonous was successfully developed by using straight chain saturation alkane based on the equilibrium principle of dispersion and collection. The efficiency of DJ-3 in freshwater, positive electricity colloid and high density salt water mud was synthetically evaluated and compared to sulfonated asphalt. Results show that DJ-3 has many good properties such as filtration reducing, lubrication, anti-collapsing, covering and plugging, temperature resistance (>150℃), salt-resistance (7%NaCl+7%KCOOH) and so on. DJ-3 has good compatibiity with AP-P1 and KCOOH, and also has good filtration reducing and rheological property in high temperature(150℃)and high density(2.0 g/cm3) mud system. It is a good filtration reducer in positive electricity colloid mud. It is a non-fluorescence and low poisonous or non-poisonous additive. Its wholeefficacy is better than sulfonated asphalt such as HL-Ⅱ, SAS.So DJ-3 is a good succedaneum of sulfonated asphalt.