Abstract
A novel betaine-type hydrophobically associating polyacrylamides (CPAM) consisting of acrylamide (AM), 1-carboxy-N, N′-dimethyl-N-(3-methyl-acrylamidopropyl) ethanaminium (CBMAA-1), Methacrylatoethyl trimethyl ammonium chloride (DMC) and N, N′-dimethyl octadecyl allyl ammonium chloride (DOAC) was synthesized, which was characterized by FT-IR and 1H NMR spectra. Rheological properties of CPAM acid solutions were studied via six-speed rotational viscometer and HAAK MARSⅢ Rheometer. Moreover, the thickening mechanism of CPAM acid solutions during the acid rock reaction was investigated by simulating the acid rock reaction process. Results showed that CPAM acid solutions demonstrated good thickening ability from low apparent viscosity to high apparent viscosity during the acid rock reaction. Meanwhile, CPAM spent acid solutions showed good shear resistance, viscoelasticity and high temperature resistance, showing great potential as a self-diverting acid solution for carbonate formation. Besides, it was found that the main factor of affecting the thickening of the CPAM acid solutions was the concentration of CaCl2.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
