油田采出水的改性及配制的胍胶压裂液性能

Modification of Oilfield Produced Water and of the Properties of Guar Gum Fracturing Fluid Formulated by the Modified Water

李冉 杨江 秦文龙 姬思雪

LI Ran，YANG Jiang，QINWenlong，JI Sixue

为提高油田采出水配制胍胶压裂液的黏度，用自制聚硅酸盐絮凝剂预处理油田采出水，再采用胺类螯合剂OM-002、含碘稳定剂P-104 和重金属锆化合物HZR-02 对其进行改性处理制备改性水，研究了OM-002、P-104 和HZR-02 对所配制胍胶压裂液黏度的影响。研究结果表明，与清水配制的压裂液相比，用预处理采出水配制压裂液的黏度大幅降低，而用改性采出水可以提高压裂液的黏度；OM-002、P-104 和HZR-02 三种添加剂复配使用的增黏效果好于单一添加剂，在OM-002、P-104、HZR-02 复配质量比为10∶2∶5 和65℃的条件下，复配改性剂可使压裂液黏度由改性前的74 mPa·s 增至306 mPa·s，并提高压裂液耐温耐剪切性能。图1表4 参15

In order to increase the viscosity of guar gum fracturing fluid formulated by oilfield produced water，the produced water was pretreated by self-made polysilicate flocculant and then modified by chelating agent OM-002，iodine-containing stabilizer P-104 and heavy-metal zirconium compound HZR-02. The influence of OM-002，P-104 and HZR-02 on the viscosity of guar gum fracturing fluid formulated by the modified water was investigated. The study results showed that the dynamic viscosity of fracturing fluid formulated by pretreated produced water decreased significantly in comparison to fresh water，while that increased by modifying oilfield produced water. The produced water modified by three additives（OM-002、P-104 and HZR-02）at the same time had more significant thickening effect than single additive. On the condition of 65℃ and a combination of OM-002，P-104 and HZR-02 in mass ratio 10∶2∶5，the dynamic viscosity of fracturing fluid increased from 74 mPa·s to 306 mPa·s after the fluid formulated by modified produced water，and the temperature and shearing resistance of fracturing fluid were augmented.

10.19346/j.cnki.1000-4092.2016.03.008