论文部分内容阅读
实验测定了2 氯乙基三甲基氯化铵(简称CETA)作为粘土稳定剂的某些性能。随CETA浓度的增大,钙蒙脱石在水中的zeta电位增大,在浓度约为2.5g/L时zeta电位为零,zeta电位增大是CETA吸附的结果。CETA在钙蒙脱土上的饱和吸附量为0.54mmol/g。以乙醇作为基准液,吸附和未吸附CETA的钙蒙脱土粉末上水的相对润湿接触角分别为89.3°和98.1°,吸附CETA使钙蒙脱土的水湿性略有增大。当CETA的吸附量由0逐步增大到0.53mmol/g时,钙蒙脱土的晶层间距由1.5713nm逐渐减小到1.4244nm。页岩在0.1%、0.2%、0.3%的CETA水溶液中的一次、二次回收率,大体上分别相当于在1%、2%、3%KCl水溶液中的相应回收率。CETA作为粘土稳定剂,可用于水基钻井液,油气层防膨处理及阳离子聚合物驱油前的地层预处理。图3表2参10。
Some properties of 2-chloroethyltrimethylammonium chloride (CETA) as a clay stabilizer were determined experimentally. With the increase of CETA concentration, the zeta potential of calcium-montmorillonite increases in water, the zeta potential is zero at the concentration of about 2.5 g / L, and the increase of zeta potential is the result of CETA adsorption. The saturated adsorption capacity of CETA on calcium montmorillonite was 0.54 mmol / g. The relative wetting contact angle of the water on the calcium montmorillonite powder with and without CETA was respectively 89.3 ° and 98.1 ° with ethanol as the reference solution. The adsorption of CETA slightly increased the water wettability of the calcium montmorillonite. When the adsorption amount of CETA gradually increases from 0 to 0.53 mmol / g, the intergranular spacing of calcium montmorillonite gradually decreases from 1.5713 nm to 1.4244 nm. The primary and secondary recoveries of shale in 0.1%, 0.2% and 0.3% CETA aqueous solutions respectively corresponded to the corresponding recoveries in 1%, 2% and 3% KCl aqueous solutions. CETA as a clay stabilizer can be used for water-based drilling fluids, oil and gas beds and anti-swelling treatment of cationic polymer pre-oil formation pre-treatment. Figure 3 Table 2 Reference 10.