耐高温酸液稠化剂的合成与性能评价

Synthesis and Performance Evaluation of High-temperature Resistance Acid Thickener

兰 健 戴姗姗 戴元梅 陈 楠 鲁红升

LAN Jian DAI Shanshan DAI Yuanmei CHEN Nan LU Hongsheng

为了构造可长期适用于深穿透酸压工艺的稠化酸体系，以丙烯酰胺（AM）、丙烯酸（AA）、2-丙烯酰胺基-2 甲基丙磺酸（AMPS）为原料，以及是否引入疏水单体AT100，分别制备了阴离子稠化剂PAP-1和疏水缔合稠化剂 PAP-2，考察了各反应条件对稠化剂性能的影响，并使用黏度计和高温流变仪对最佳反应条件下制备的稠化剂进 行了性能研究。确定了稠化剂PAP-1的最佳合成条件为：AM、AA和AMPS物质的量之比为90∶9∶1，引发剂占单 体总质量的0.03%，单体质量分数为25%，反应温度为55℃；稠化剂PAP-2最佳合成条件除疏水单体占其余单体 物质的量0.2%，其余与稠化剂PAP-1的一致。研究结果表明：常温下，0.8%稠化剂PAP-1和PAP-2在20%盐酸中 的酸溶时间分别为20、50min，酸液黏度分别39和54mPa·s，且与其余添加剂配伍性好。质量分数为0.8%的稠 化剂PAP-1和PAP-2与添加剂复配后，在160℃、170 s-1下酸液黏度分别为10、31 mPa·s，黏度保留率分别为 25.6%和57.4%。相比于稠化剂PAP-1，稠化剂PAP-2具有更优异的增黏耐温性能。因此，稠化剂PAP-2完全满足 酸化压裂现场要求，在深井及超深井中有着良好的应用前景。

In order to construct the thickener acid system that can be applied in deep penetration acid fracturing process for a long time，anionic thickener PAP-1 and hydrophobically associating thickener PAP-2 was prepared using acrylamide（AM），acrylic acid （AA），2-acrylamido-2-methylpropanesulfonic acid（AMPS）as main raw materials and AT100 as hydrophobic monomer. The effect of reaction conditions on the properties of thickeners was investigated，and the performances of thickeners obtained under optimal conditions was researched by measurement of the viscometer and rheometer. The optimal reaction conditions of thickener PAP-1 were obtained as follows，the molar ratio of AM，AA and AMPS was 90∶9∶1，the initiator dosage was 0.03% of monomer mass，monomer mass concentration was 25%，the temperature of the reaction system was 55 ℃. Except for the hydrophobic monomer AT100 dosage of 0.2 mol%，the reaction conditions of thickener PAP-2 were the same as that of the thickener PAP-1. The results indicated that the acid dissolving time of thickeners PAP-1 and PAP-2 with mass fraction of 0.8% in hydrochloric acid with mass fraction of 20% at room temperature was 20 min and 50 min，respectively，and the viscosity was 39 mPa·s and 54 mPa·s， respectively. Meanwhile，they had good compatibility with another additive. The viscosity of PAP-1 and PAP-2 acid fluid was 10 mPa·s and 31 mPa·s at the temperature of 160 ℃ and at the shear rate of 170 s-1

10.19346/j.cnki.1000-4092.2023.04.011