Simulation experiment set for thickened oil thermal recovery storage layer fractures

Abstract

The invention discloses a simulation experiment set for thickened oil thermal recovery storage layer fractures, and belongs to the field of thickened oil thermal recovery development. The simulation experiment set provides an experiment basis for the theoretical study on thickened oil thermal recovery development schemes and engineering design optimization. The simulation experiment set comprises experiment rock samples, a vacuum tri-axial stress loading device, a temperature loading controlling device and a sound launching monitoring device. The experiment rock samples are cuboid and comprise an actual oil deposit coring and cement mortar wrapper. The experiment rock samples reflect the rock mechanical property of actual oil deposition more truly. The temperature loading controlling device carries out local heating through heating pipes and transmits the heat to the experiment rock samples through a heat-transfer medium, the actual high-temperature thermal process is simulated, and a temperature collecting and controlling instrument collects and controls the temperature of the experiment rock samples. The simulation experiment set simulates the combined stress state of the thickened oil thermal recovery process under the different temperature and crustal stress conditions, and actual and effective evaluations on the fractures of thickened oil thermal recovery storage layers can be made.

Description

technical field [0001] The invention belongs to the field of thermal recovery and development of heavy oil, in particular to a simulation experiment device for reservoir rupture in thermal recovery of heavy oil. Background technique [0002] my country is rich in heavy oil resources. Thermal oil recovery is an important way to develop heavy oil resources. It heats heavy oil by injecting thermal energy carriers into oil reservoirs, reduces the viscosity of crude oil, and improves the flow capacity of crude oil, thereby increasing crude oil production and recovery. . In the process of thermal recovery of heavy oil, the injection of high-temperature heat energy causes the temperature and pressure in the reservoir to increase significantly, and the viscosity of crude oil decreases; the pore fluid and rock formation skeleton undergo non-uniform expansion due to heating, resulting in deformation and rupture of the reservoir. The study of reservoir rupture mechanism and fracture pr...

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Problems solved by technology

However, the fracture of heavy oil thermal recovery reservoirs is jointly controlled by the local high temperature load of the wellbore and the three-dimensional non-uniform ground stress. The current research is mainly based on reservoir numerical simulation methods, and there is a lack of related heavy oil thermal recovery reservoir fractures. The simulated experimental devices and methods cannot truly and effectively evaluate the rupture of the actual heavy oil thermal recovery reservoir, so it has become a difficult problem in the field of heavy oil thermal recovery development

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