Solvent-assisted sagd three-dimensional physical simulation experiment method and experimental device

Abstract

The invention provides a solvent-assisted SAGD three-dimensional physical simulation experiment method and an experiment device. The device includes an injection device, a simulated reservoir model and a recovery device. In the injection device, the first pump unit communicates with the piston container unit, the second pump unit communicates with the steam generator, and the piston container unit and the steam generator communicate with the simulated reservoir model respectively. The steam injection well is connected; one end of the first condenser in the recovery device is connected with the production well of the simulated reservoir model, the other end of the first condenser is connected with the feed port of the gas-liquid separator, and the second condenser is connected with the gas-liquid separator. The liquid outlet of the separator is connected, the third condenser is connected with the gas outlet of the gas-liquid separator, the crude oil and water collection container is connected with the second condenser, and the solvent recovery container is connected with the third condenser. The experimental method and experimental device of the present invention can simulate the mining conditions of the solvent-assisted SAGD technology, study the mechanism of the solvent in the SAGD process, and optimize and improve the existing solvent-assisted SAGD technology according to the reservoir conditions.

Description

technical field [0001] The invention relates to a solvent-assisted SAGD three-dimensional physical simulation experiment method and an experiment device, which belong to the technical field of petroleum exploitation. Background technique [0002] Solvent-Steam-Assisted Gravity Drainage Solvent-assisted SAGD (Expanding-Solvent-Steam-Assisted Gravity Drainage) is a new SAGD production technology proposed on the basis of the existing steam-assisted gravity drainage SAGD production technology. Solvent-assisted SAGD technology is an improvement on the traditional SAGD technology. The mixture of hydrocarbon solvent and steam is injected into the reservoir, so that the demand for water treatment in the production process is less, the energy consumption per unit of oil production is lower, and the oil recovery rate is increased. A technology that is more environmentally friendly and more economical. [0003] Solvent-assisted SAGD technology is very suitable for the development of s...

AI Technical Summary

Problems solved by technology

However, due to the high viscosity of crude oil, shallow formation burial, and low driving energy in the huff and puff phase, the huff and puff period is short and the oil-gas ratio is low. low (less than 20%)

At the same time, although the conventional SAGD technology that has been used has achieved certain success in the exploitation of Fengcheng heavy oil in Xinjiang, there are still many shortcomings in the actual use of this technology. It needs to pass physical simulation experiments first, and small-scale physical simulation Find a breakthrough in the process, optimize and perfect the existing SAGD technology

Solvent-assisted SAGD is an existing desirable method. The solvent injected into the formation with steam can effectively reduce the viscosity of crude oil, and the solvent can be recycled. method of physical simulation

Images