It is prepared using ultra-high molecular weight copolymerization process, with molecular weight ranging from 15 to 20 million Dalton, greatly increasing the viscosity of injected water and adjusting the water-oil mobility ratio. It is added with special salt-resistant and heat-stabilizing additives, which can maintain stable viscosity and oil displacement effect in high-salt formations (≥10000mg/L NaCl) and high-temperature environments (≥90℃). It adopts granular packaging, which is convenient for transportation and storage, and its dissolution speed is compatible with on-site dosing equipment of oilfields. Compared with traditional oil displacement agents, its oil displacement efficiency is improved by ≥15%, which can help oilfields increase crude oil recovery rate by 10%-15%, greatly increasing mining revenue.
It appears as white odorless granules, with a solid content of ≥93%, molecular weight covering 15 to 20 million Dalton, viscosity of ≥50 mPa·s in 0.1% aqueous solution, salt resistance of ≥10000mg/L NaCl, thermal stability of ≥90℃, dissolution time ≤90 minutes (90℃ formation water), compatible with on-site dosing equipment of oilfields, standard single bag packaging of 25kg, storage environment requires temperature of 5-35℃ and relative humidity ≤70%, shelf life of 2 years, and oil displacement efficiency improvement rate of ≥15%.
It is mainly used as an oil displacement agent in the EOR process of onshore and offshore oilfields to improve crude oil recovery rate. It can also be used in profile control and water plugging processes of oilfield development, plugging high-permeability layers, adjusting water absorption profile and improving the utilization degree of oil reservoirs. It can also be used for oilfield wastewater treatment, realizing purification and recycling of produced water, helping oilfield enterprises reduce sewage treatment costs and water waste.
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