Three-axis permeability test and CO2 displacement simulation test device

Abstract

The invention discloses a three-axis permeability test and CO2 displacement simulation test device, and belongs to the field of coal bed gas exploitation. The device is composed of a model system (1),a gas control system (2), a temperature control system (3), a three-axis loading system (4), a vacuumizing system (5), a gas sample collecting system (6), and an electrical controlling and monitoringsystem. The gas control system (2) supplies gas for a test. The temperature control system (3) controls the temperature of the test. The three-axis loading system (4) supplies confining pressure andaxial pressure. The gas sample collecting system (6) collects a gas sample and analyzes the gas components. The electrical controlling and monitoring system monitors the test. The device can simulatethe CO2 displacement process in a lab; moreover, by measuring the pressure pulse applied on the inlet end of a rock sample, the attenuation data can be obtained, and then the permeability of rock sample is calculated. The device has the advantages that the temperature control precision is high, the temperature fluctuation is small, and the device is easy to control and install and is safe and reliable.

Description

technical field [0001] The invention relates to a permeability test and displacement simulation test device, in particular to a triaxial permeability test and CO 2 A displacement simulation test device belongs to the field of coal bed methane exploitation. Background technique [0002] Coal bed methane (coal mine gas) and shale gas are new types of efficient and clean energy. The development of coalbed methane and shale gas is of great significance to alleviating the shortage of oil and gas resources in my country, reducing the degree of mine disasters, and reducing greenhouse gas emissions. my country is rich in coalbed methane and shale gas resources, and the reserves of coalbed methane shallower than 2000m reach 36.81×10 12 m 3 , shale gas reserves up to 30×10 12 m 3 Above, the development potential is huge. However, the development and utilization rate of coalbed methane and shale gas in my country is relatively low. An important factor restricting their developmen...

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Problems solved by technology

[0004] Existing laboratory for CO 2 Displacing or replacing coal seam CH 4 As well as the test device and method for testing rock permeability, for tight rocks su

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