Product Introduction
Heat- and Salt-Resistant Polymers
1. Application Areas
Oil displacement agents are primarily used in tertiary oil recovery in oilfields. A certain amount of water-soluble, heat- and salt-resistant polymer—characterized by high molecular weight, low filtration factor, and low adsorption capacity—is added to the injection water to increase the viscosity of the injection water and improve the oil-to-water flowability ratio. The injected polymer solution has high viscosity and, after passing through the oil reservoir, exhibits a high residual resistance coefficient as well as viscoelastic effects. The higher the viscosity and elasticity, the greater the residual resistance coefficient, and the smaller the flowability ratio between the displacing phase and the displaced phase. Consequently, the polymer displacement method plays a greater role in expanding the macroscopic and microscopic sweep factors of the oil reservoir, leading to a greater increase in recovery rates.
2. Product Characteristics
Among the series of new heat- and salt-resistant polymers developed by the company, the low-to-medium molecular weight salt-resistant product KCY-45Q is suitable for low-permeability oil reservoirs; the medium-to-high molecular weight salt-resistant product KCY-50Q is suitable for high-permeability reservoirs; and the medium molecular weight salt-resistant product KCY-80Q is suitable for high-salinity reservoirs. Compared to conventional oil displacement agents used in the third-phase recovery of oilfields, this product series offers the advantage of being directly mixed and injected using produced water, which significantly reduces environmental pressure and injection costs. This product is a medium-molecular-weight salt-resistant polymer obtained by copolymerizing acrylamide with functional monomers featuring a branched structure that enhances rigidity. By increasing the rigidity of the polymer molecular chains, it reduces the degree of chain coiling in saline water, minimizes the compression of the polymer molecular coils, and improves the polymer's salt resistance. Currently, this product series is widely used in tertiary oil recovery at the Daqing Oilfield, where it has significantly increased crude oil recovery rates, yielded excellent economic benefits, and received unanimous praise from customers.
3. Product Specifications
Technical Specifications
| Apparent Viscosity(cP) | Test Temperature(℃) | Test Concentration(mg/L) | Test Brine Salinity (mg/L) |
| ≥25 | 45 | 1000 | 6000 |
