CO2 displacement simulated testing method

Abstract

The invention discloses a CO2 displacement simulated testing method and belongs to the field of coal bed gas exploitation. A rock sample is placed in a model system (1), pressure pulse is applied on the rock sample; a gas control system (2) supplies test gas to the model system (1); a temperature control system (3) controls the temperature of the model system (1); a three-axis loading system (4) applies a confining pressure and an axial pressure on the rock core clamp of the model system (1); a vacuumizing system (5) vacuumizes the testing device; a gas sample collection system (6) detects thegas components after the test; and an electric controlling and monitoring system monitors the test process. The method comprises following steps: filling a sample into a tank, checking the air tightness, simulating the displacement, and cleaning the test system. The provided method can simulate the high temperature and high pressure environment in a deep coal layer in a lab; by applying pressurepulse on the rock sample inlet port, a simulated CO2 displacement test can be realized; the test efficiency is high, the external influence on the test is small, and the test result is more accurate.

Description

technical field [0001] The invention relates to a test method, in particular to a CO 2 A displacement simulation test method 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 development is that coal seams and shale are tight rock formations with low permeabilit...

AI Technical Summary

Problems solved by technology

[0004] Existing labs for CO 2 The displacement test method, for tight rocks such as coal seams and shale, the test effici

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