| abstract |
The invention relates to a high-temperature, high-salt, low-permeability oil reservoir control and displacement composition and its application in tertiary oil recovery of high-temperature, high-salt, low-permeability oil reservoirs, and mainly solves the problem of high-temperature, high-salt and low-permeability oil existing in oil displacement agents in the prior art The problem of poor temperature and salt resistance and low oil displacement efficiency under reservoir conditions. The invention adopts the high-temperature, high-salt and low-permeability oil reservoir control and displacement composition, which comprises the following components in weight percent: (1) 0.01-3.0% of temperature-resistant and salt-resistant polyacrylamide microspheres; (2) 0.01-5.0% % anion-nonionic surfactant; (3) The technical scheme of 92.0-99.98% injection water solves this problem well, and can be used for deep profile control and water shutoff in tertiary oil recovery of high-temperature, high-salt and low-permeability reservoirs , oil flooding and other field applications of enhanced oil recovery. |