Solvent-assisted SAGD three-dimensional physical simulation experiment method and device

Abstract

The invention provides a solvent-assisted SAGD three-dimensional physical simulation experiment method and device. The device comprises an injection device, a simulated oil reservoir model and a recycling device, a first pump unit in the injection device is communicated with a piston container unit, a second pump unit is communicated with a steam generator, the piston container unit and the steam generator are communicated with a gas injection well of the simulated oil reservoir model respectively, one end of a first condenser of the recycling device is communicated with a production well of the simulated oil reservoir model while the other end of the same is communicated with a feeding port of a gas-liquid separator, a second condenser is communicated with a liquid outlet of the gas-liquid separator, a third condenser is communicated with a gas outlet of the gas-liquid separator, a raw oil and water collection container is connected with the second condenser, and a solvent recycling container is connected with the third condenser. By the method and the device, mining conditions of solvent-assisted SAGD technology can be simulated, and mechanism of solvent in the process of SAGD can be studied so as to optimize and improve existing solvent-assisted SAGD technology according to oil 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

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