Synthesis, Characterization, and Property Evaluation of a Hydrophobically Modified Polyacrylamide as Enhanced Oil Recovery Chemical

Abstract

A novel hydrophobically modified polyacrylamide p(AM/NaA/OP-10-AC/BOAM) was successfully synthesized via an aqueous micellar copolymerization method from acrylamide (AM), sodium acrylate (NaA), octylphenol polyoxyethylene acrylate (OP-10-AC), and small amounts of N-benzyl-N-octylacrylamide (BOAM), with the aim of investigating the copolymer's rheological behaviors under various conditions such as polymer concentration, shearing, temperature and salinity. The copolymer was characterized by infrared spectroscopy, scanning electron microscopy, and atomic force microscope. Scanning electron micrographs show large aggregates in solution formed by the association from the hydrophobic groups of the copolymer. Compared with partially hydrolyzed polyacryamide (HPAM), the copolymer shows a much higher thickening capability and a much greater ability to resist shearing, heat, and salts. This good property of the copolymer is attributed to its three-dimensional dimensional network structure. Downloaded by [New York University] at 23:49 15 July 2015 2According to the core flooding test, it can be obtained that oil recovery is enhanced about 4.3% by the copolymer flooding contrasted to the HPAM flooding in mid-low permeability cores under conditions of 1500 mg/L of polymers and 45 °C. All the results prove that the copolymer has the capability of increasing oil recovery by improving waterflood sweep efficiency in high-salinity reservoirs.

Adsorption of new hydrophobic polyacrylamide on the calcite surface

“…Since being synthesized, hydrophobic polyacrylamide (HPAM) has been gaining attention in application fields. It has been widely used in paper making, medicine, water treatment, agriculture, and especially petroleum exploitation . Theoretically, the molecular weight of HPAM is huge, and there is a large volume of hydrophilic groups on the chain of HPAM; this leads to an increase in the viscosity of the aqueous solution after it HPAM disappears quickly into water.…”

Characterization and Dimethyl Phthalate Flocculation Performance of the Cationic Polyacrylamide Flocculant P(AM-DMDAAC) Produced by Microwave-Assisted Synthesis

“…In Figure 11, the absorption peaks at 3415.24 and 1654.09 cm −1 were assigned to the stretching vibration of -NH 2 and C=O in the AM monomer, respectively [27,46]. The peak at 2932.22 cm −1 represented the asymmetric absorption peak of -CH 3 in the DMDAAC monomer, and the peak at 1449.46 cm −1 represented the stretching vibration absorption peak of -CH 2 -in the -CH 2 -N + group of DMDAAC [47].…”

Dual-Responsive Nanotubes Assembled by Amphiphilic Dendrimers: Controlled Release and Crosslinking

“…Stimuli-responsive delivery devices, known as "smart" release nanosystems, are poised to be used in diverse applications such as tumor therapy, antisepsis, and corrosion protection, which require tuning release via external stimuli [1][2][3]. Most recently, controllable release systems have been desired in practical application fields such as the petroleum industry due to the great need for "precise" profile control in order to enhance oil recovery [4][5][6][7]. After long-term water flooding, the vertical heterogeneity of a reservoir's porosity is dramatically enlarged, resulting in increased water outflow and decreased crude oil production.…”