The high-temperature and high-pressure visual oil-water metering device comprises a metering main body, the metering main body is provided with a metering cavity, the metering cavity is a #-shaped channel inner cavity which is communicated with one another, and the #-shaped channel inner cavity comprises an upper transverse metering channel, a lower transverse metering channel, a left longitudinal metering channel and a right longitudinal metering channel. The #-shaped inner cavity in the structural design plays a role of a U-shaped
pipe in the experiment process, the physical phenomenon of automatic gravity differentiation of oil and water due to
density difference is fully utilized, high-pressure gas-containing
crude oil is metered at the upper part of the inner cavity, and high-temperature and high-pressure water is metered at the lower part of the inner cavity. The pressure of the high-pressure gas-containing
crude oil and the high-temperature and high-pressure water outlet
pipe is controlled to be the simulated oil
reservoir pressure through the back-pressure valve, so that the pressure of the whole metering
system is always higher than the
gas bubble point pressure, the
crude oil degassing phenomenon is avoided, the crude oil in the
rock core is always kept in a gas-containing state, and a guarantee is provided for the subsequent
rock core depressurization and degassing process.