Pengfei Zheng's research while affiliated with Sichuan University and other places

Publications (2)

Article
Water-alternating-CO2 gas (WAG) flooding is a common technique to enhance oil recovery via improving CO2 sweep efficiency, but serious gas channeling may still occur, especially in reservoirs with strong heterogeneity, due to a poor blocking capacity of aqueous slugs to the “channeling” pathway induced by their low viscosity. Herein, a copolymer wh...
Article
N,N‐dialkylaminoethyl methacrylate (DAEA) monomers are extensively used to prepare multi‐responsive polymers. However, these monomers face high risk of hydrolysis in their ester groups when being polymerized in water‐containing medias. Here, NMR spectroscopy was employed to continuously track the hydrolysis and solubility of four widely used DAEA m...

Citations

... The injected CO 2 successfully infiltrated into the matrix to displace the crude oil, and the recovery rate in the dense core (0.85 md) increased by 8.2%. Luo et al. [156] added synthetic triblock tackifier polymer (f127-g-pdmaema) to water slug to control gas channeling during water-oil displacement. It is worth noting that the copolymer shows the synergistic thickening ability of heat/CO 2 and forms a stable gel above the gel temperature. ...
... It is known that dialkylaminoethyl methacrylates not only transesterify with primary alcohols, but they also readily hydrlolyze in aqueous solutions. 17 A similar approach was performed previously by our group using the NMP approach to obtain CO 2 -responsive CNC. In these reports, CNC were grafted with PMMA, 18 PDMAEMA, PDEAEMA, and poly(dimethylaminopropyl methacrylamide) PDMAPMAm via grafting-from 19 and grafting-to 20 where the grafted CNC also formed redispersible systems under CO 2 . ...