固井用冲洗液 BH-Q812L的研制与应用

Development and Application of Flushing Fluid BH-Q812L for Cementing

齐 奔 林志辉 朱 禹 刘文明 付家文 王贵富 闫振峰

QI Ben，LIN Zhihui，ZHU Yu，LIU Wenming，FU Jiawen，WANG Guifu，YAN Zhenfeng

为了解决井壁和套管上残留的钻井液导致固井水泥环界面的胶结质量差的问题，采用非离子表面活性剂、阴离子表面活性剂和无机盐助剂复配，通过考察复配冲洗液的冲洗效率和适用温度等指标，确定了基本配方为6.4%壬基酚聚氧乙烯醚（15）（TX-15）+ 6.4%椰子油脂肪酸二乙醇酰胺（6501）+ 6.4%十二烷基苯磺酸钠（SDBS）+ 0.64%三聚磷酸钠（STPP）+ 0.16%防腐剂卡松 + 80%去离子水的冲洗液 BH-Q812。考察了冲洗液BH-Q812L的抗温性能、冲洗效率以及相容性能等。研究结果表明，该冲洗液抗温达 150℃。BH-Q812L加量 5%时的冲洗液在冲洗 4 min后对聚合物钻井液和盐水钻井液的冲洗效率高达 95%；BH-Q812L加量 10%的冲洗液在冲洗 5 min后对硅基防塌钻井液的冲洗效率高达 95%以上。该冲洗液与钻井液、水泥浆均具有良好的相容性。该冲洗液已被现场应用于 3种不同类型的钻井液体系的井中，取得了良好的固井质量。图 2表 5参 10

In order to solve the problem of poor cementing quality caused by residual drilling fluid on wellbore and casing，the formulation of flushing fluid was studied. Through evaluated the flushing efficiency and suitable temperature of the flushing fluid，the non-ionic surfactant，anionic surfactant and inorganic salt additive as raw materials were optimized by different experiments ，and the recipe of the flushing fluid was obtained as follows，6.4% of nonylphenol polyethylene glycol ether （15） TX-15， 6.4% of coconutt diethanol amide（6501），6.4% of sodium dodecyl benzene sulfonate（SDBS），0.64% of sodium tripolyphosphate（STPP），0.16% of kathon and 80% of deionized water，named as BH-Q812L. The temperature resistance，flushing efficiency and the compatibility of the BH-Q812L with drilling fluid and cementing slurry were investigated. The results exhibited that the resistance temperature of BH-Q812L was reached up to 150℃. The flushing efficiency for polymer and salt water drilling fluid was higher than 95% within 4 min using the flushing fluid containing 5% of BH-Q812L；and the flushing efficiency for silicon-based drilling fluid was higher than 95% within 5 min using the flushing fluid containing 10% of BH-Q812L. Moreover，the compatibility of BH-Q812L with drilling fluid and cementing slurry was excellent. The BH-Q812L had been used in eight wells of different drilling fluid，gaining good operation achievement.