Supercritical carbon dioxide drive physical analogue device

Abstract

The present invention relates to a supercritical carbon dioxide drive physical analogue device, which belongs to the technical field of petroleum engineering and technology. The device adopts two paratactic simulation core devices to be connected with an injecting system, and each simulation core device is provided with an outlet measuring system; the injecting system injects formation water, crude oil and supercritical carbon dioxide to the simulation core devices, and a temperature and pressure measuring and controlling system is adopted to control the temperature set value and the pressure value of the whole system, and the outlet measuring system is adopted to measure the volumes of the carbon dioxide, the formation water and the crude oil which pass through the simulation core devices. After the CO2 gas is cooled and liquefied, the CO2 gas is pressurized and heated up to the supercriticality, and the difficulty of the accurate measurement of the injected CO2 flow; by adopting a double-tube model, the fingering and cross flow phenomenon during the driving process of the heterogeneous reservoir CO2 can be simulated; the design pressure of the device is 0 to 40 MPa, the design temperature is 0 to 180 DEG C, and the device is mainly applied to the research on supercritical CO2 miscible drive, non-miscible drive, continues gas drive or water and gas alternate drive.

Description

technical field [0001] The invention relates to a supercritical carbon dioxide flooding physical simulation device, which belongs to the technical field of petroleum engineering and technology. Background technique [0002] Injecting CO 2 During oil production, due to viscous fingering and reservoir heterogeneity, gas channeling usually occurs, seriously affecting CO 2 It involves sweep efficiency and displacement efficiency, so it is necessary to conduct in-depth research on this aspect. Physical simulation is one of the most common and effective experimental methods. At present, the CO 2 In terms of physical simulation of oil displacement, most of the simulated core systems on experimental devices are mainly one-dimensional single-pipe models made of metal pipe sand filling models or natural core models, which cannot analyze gas channeling well. Two-dimensional or three-dimensional core physical model, due to the complexity of the model, greatly increases the cost of pr...

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Problems solved by technology

At present, most experimental devices cannot solve this problem well.

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