TCA温控变黏酸体系的研制与性能评价

Research and Property Evaluation of Temperature Controlling Viscosity Acid (TCA)

马喜平 马文杰 马启睿

MA Xi-Ping MA Wen-Jie MA Qi-Rui

采用水溶液均相聚合法，以AM、AMPS、DAC、NVP为单体合成了稠化剂PAMSDV。通过考察PAMSDV用量、交联剂用量对温控型变黏酸TCA黏度的影响，得到了TCA的最佳配方为：5% PAMSDV + 1.25% 交联剂(交联剂为甲醛、Al2(SO4)3 质量比1:1)，由20%盐酸配制。该配方TCA体系的黏度能够随温度的变化而变化；在70℃时的黏度达到最高，为2400 mPa·s，虽然在90℃下的黏度有所降低，但黏度仍有1100 mPa?s，表现出较好的抗温性。此外，TCA与其他酸液添加剂配伍性优良且具有优良抗盐性和缓速性，破胶完全，破胶液的黏度为8 mPa?s。

the thickening agent PAMSDV was synthesized by homogeneous polymerization in aqueous solution，using AM, AMPS, DAC and NVP as raw materials. Through investigating the effect of the dosage of PAMSDV and cross-linking agent on the viscosity of temperature controlling viscosity acid (TCA), the optimal recipe of TCA was obtained, which was composed of 5% PAMSDV and 1.25% cross-linking agent (cross-linking agent comprised methane and Al2(SO4)3 at mass ratio of 1:1), and dissolved in 20% hydrochloric acid. The viscosity of the TCA system changed with temperature. The viscosity reached the maximum value of 2400 mPa·s at the temperature of 70℃. Although the viscosity decreased a little at the temperature of 90℃, the viscosity was 1100 mPa?s, which displayed a certain performance of high-temperature resistance. In addition, the TCA system had other excellent performances such as compatibility, salt resistance and acid-rock reaction retardation. After the gel of the TCA was completely broken, the viscosity of the gel breaking fluid was 8 mPa?s.