原位活化纳米材料提高油基钻井液乳化稳定性研究

Study on the Emulsion Stability of Oil-base Drilling Fluid Treated with In-situ Activation Nano Material

根据纳米颗粒材料可以提高乳状液稳定性的基本原理,将提高乳状液稳定性的纳米颗粒材料引入到油基钻井液中。研究了纳米颗粒材料与原位活化纳米颗粒材料的性质,他们提高油基钻井液乳化稳定性的程度,及其他们加入密度为2.1 g/cm3的油基钻井液后的综合性能变化。结果表明,原位活化的纳米颗粒材料小于100 nm并可以在油相中分散,随着原位活化纳米颗粒材料加量的增加,油基钻井液破乳电压稳定性也增加,最大增加幅度可达1倍;添加了0.5%的原位活化纳米颗粒材料的高密度油基钻井液,在120℃条件下老化16 h后与未添加原位活化纳米颗粒材料相比,破乳电压从479 V提高到773 V,高温高压降滤失性能从8.4 mL降低到3.8 mL。

Nano material is introduced into oil base drilling fluid to improve its emulsion stability. Study shows that, in-situ activation nano material, after adding into oil base drilling fluid of 2.1 g/cm3, has its particles smaller than 100 nm dispersed in the oil phase, and the emulsion stability of the oil base drilling fluid almost doubled at the most with an increase in the concentration of the in-situ activation nano material. After aging at 120 ℃ for 16 hours, high density oil base drilling fluid treated with 0.5% in-situ activation nano material, has its electric stability(ES) increased from 479 V to 773 V, and HTHP fluid loss decreased from 8.4 mL to 3.8 mL.