Abstract
In this paper, a new kind of oil cement retarder is prepared by aqueous solution polymerization using acrylamide (AM), 2-methyl-2-acrylic amide propyl sulfonic acid (AMPS) and maleic anhydride (MA) as monomers, and then the polymer PAAM (the acronym of polymer is synthesized by AM, AMPS and MA) was characterized by Fourier transform infrared spectroscopy, the paper also introduced the field performance of this new kind of oil well cement retarder PAAM. Additionally, low field nuclear magnetic resonance (LF-NMR) test technology is employed to test the transverse relaxation time T2 distribution of cement slurry in hydration process, the pure cement slurry C and the cement slurry CHN-1 mixed with polymer PAAM were used as the research object. Finally, combined with the scanning electron microscope (SEM), a further exploration about the retarding mechanism of polymer PAAM was conducted, which shows that mainly reflected in the adsorption, precipitation and complexation effect.
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