耐高温丁苯胶乳BZT-L1 的制备与性能评价

Preparation of Styrene-butadiene Latex and Performance Evaluation of Oil Well Cement Slurry

齐奔 付家文 孙勤亮 刘文明 于倩倩 杜滨 林志辉 马作鹏

QI Ben，FU Jiawen，SUN Qinliang，LIUWenming，YU Qianqian，DU Bin，LIN Zhihui，MAZuopeng

为了解决阴离子丁苯胶乳原浆直接用于油井水泥浆存在的性能不稳定问题，在优选胶乳稳定剂的基础上，由70%丁苯胶乳原浆、2%非离子表面活性剂FB-1、1%非离子表面活性剂FB-2、0.4%阴离子表面活性剂YB-1、0.25%阴离子表面活性剂YB-2 和适量防腐剂与去离子水制备了耐高温丁苯胶乳BZT-L1，研究了采用BZT-L1 配 制的胶乳水泥浆机械稳定性、抗盐和抗温性能。研究结果表明，在温度50～150℃、压力25～75 MPa 下，加有6% BZT-L1 的胶乳水泥浆体系的稳定性良好，水泥浆的稠化曲线为直角稠化。此外，胶乳水泥浆具有良好的抗盐性，使用半饱和盐水配制的水泥浆，其稠化曲线平稳，基本可以实现直角稠化。在常规密度水泥浆中加入BZT-L1胶乳，不但可以减少水泥浆体系的失水（低于50 mL），而且胶乳水泥浆表现出良好的综合性能:具有良好的流动性，流动度均大于20 cm，自由水、密度差均几乎为零，水泥石养护24 h后的抗压强度均大于14 MPa。图5表5参12

In order to solve the problem of cement slurry unstable problem of anionic styrene-butadiene latex happened when directly added into to oil well，the suitable stabilizers were optimized by different experiments. The styrene-butadiene latex was composed of 70% of styrene butadiene latex puree，2% of the non ion surface active agent FB-1，1% of non ion surface active agent FB-2，0.4% of the anion surface active agent YB-1，0.25% of the anion surface active agent YB-2 as well as a certain amount of preservatives and deionized water，denoted as BZT-L1. It was studied on the latex cement slurry properties of mechanical stability， salt resistance and temperature resistance. At the temperature of 50—150℃ and the pressure of 25—75 MPa，latex cement slurry systems containing 6% of BZT-L1 exhibited excellent stability，and the thickening curve of cement slurry showed right angle thickening. Besides，the BZT-L1 cement slurry exhibited excellent half-saturation salt resistance properties，and thickening curve of cement slurry showed right angle thickening. The conventional density slurry containing BZT-L1 not only reduced the fluid loss （less than 50 mL）but also exhibited excellent combination properties，such as good rheological properties，low fluid loss，zero free liquid，and cement slurry density almost zero，etc. Moreover，the cement compressive strength was more than 14 MPa after curing 24 h.

10.19346/j.cnki.1000-4092.2016.03.005