CO2 mixed-phase core displacement outer phase-mixing device and method

Abstract

The invention relates to a CO2 mixed-phase core displacement outer phase-mixing device which comprises a CO2 filling device, a CO2 phase-mixing device and a multifunctional counting device. The CO2 filling device comprises a manual pressure pump, a CO2 storage, a first guide pipe, a second guide pipe and a third guide pipe, the CO2 phase-mixing device comprises an automatic pressure pump, a high-pressure and high-temperature-resistible phase mixer, a fourth guide pipe, a fifth guide pipe, a core clamping device, a sixth guide pipe and a differential pressure measuring device, and the multifunctional counting device comprises a multifunctional counter, a large measuring cylinder and a seventh guide pipe. According to a CO2 mixed-phase core displacement outer phase-mixing method, experimentsare performed by the CO2 mixed-phase core displacement outer phase-mixing device. CO2 mixed-phase core displacement outer phase-mixing effects are achieved, a whole oil displacing process can be completely simulated after CO2 phase-mixing, CO2 phase-mixed effects are really evaluated, and the volume of various phases of fluids after displacement can be accurately measured.

Description

technical field [0001] The invention relates to the technical field of core displacement, in particular to a CO 2 Miscible equipment and method for miscible flooding outside the core. Background technique [0002] For the development of oil and gas reservoirs, CO 2 Miscible flooding is an effective and economical means to enhance oil recovery. Currently indoor simulated CO 2 Miscible flooding experiments often use CO injection directly into the core 2 , and then simulate CO 2 The flow process of miscible flooding is limited by the size of the core, and the CO in the short core 2 If the miscible state cannot be fully achieved, the gas will flow to the outlet of the core, and the CO2 cannot be fully simulated. 2 The effect of miscible flooding front affects the reliability and accuracy of the experimental results; in addition, conventional metering methods mostly use open measuring cylinders for direct measurement, which cannot collect and measure the gas, resulting in e...

AI Technical Summary

Problems solved by technology

Currently indoor simulated CO 2 Miscible flooding experiments often use CO injection directly into the core 2 , and then simulate CO 2 The flow process of miscible flooding is limited by the size of the core, and the CO in the short core 2 If the miscible state cannot be fully achieved, the gas will flow to the outlet of the core, and the CO2 cannot be fully simulated. 2 The effect of miscible flooding frontal displacement affects the reliability and accuracy of the experimental results; in addition, the conventional measurement methods mostly use open measuring cylinders for direct measurement, which cannot collect and measure the gas, resulting in experimental errors

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