Premium
Copolymer MCJS as a retarder of the acid–rock reaction speed for the stimulation of deep carbonate reservoirs
Author(s) -
Quan Hongping,
Li Huan,
Huang Zhiyu,
Dai Shanshan,
Jiang Jifeng
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.41471
Subject(s) - carbonate , gel permeation chromatography , hydrochloric acid , fourier transform infrared spectroscopy , chemistry , sulfonic acid , polymer chemistry , nuclear chemistry , inorganic chemistry , chemical engineering , organic chemistry , engineering , polymer
The fast reaction rate between hydrochloric acid and carbonates causes the most acid consumption near the wells, and the acid cannot penetrate the deeper places of the carbonate reservoir; this limits the application of acidizing modifications for the reservoir. In this study, we chose acrylamide, 2‐acrylamido‐2‐methyl‐1‐propane sulfonic acid (AMPS), allyl alcohol polyoxyethylene ether (APEG), and N ‐dimethyl‐ N ‐vinyl nonadecan‐1‐aminium chloride (DMAAC‐18) to synthesize a quadripolymer (MCJS) that could reduce the reaction rate mentioned previously. The molecular structure of MCJS was characterized by Fourier transform infrared and 1 H‐NMR spectroscopy. The molecular weight and molecular weight distribution of MCJS was determined by gel permeation chromatography. Carbonate rock was analyzed by X‐ray diffraction and energy‐dispersive X‐ray spectroscopy. The retarding properties of the acid mixed with MCJS (MCJS acid) were investigated, and the resulting reaction rate between the acid and carbonate decreased obviously, even at a low viscosity. Scanning electron microscopy and core flood experiments showed that the MCJS could be adsorbed on the carbonate rock surface and form a hydrated film that delayed the reaction. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41471.