Rock permeability and longitudinal and transverse wave velocity simultaneous measurement system

Abstract

The invention discloses a rock permeability and longitudinal and transverse wave velocity simultaneous measurement system, which comprises a sample placement tube, wherein a rock sample is placed in the sample placement tube, an ultrasonic transmitting head and an ultrasonic receiving head which are respectively attached to the surface of the rock sample are embedded and fixed on the opposite side walls of the sample placement tube, and the ultrasonic transmitting head and the ultrasonic receiving head are electrically connected with a wave velocity acquisition controller; two jacking mechanisms, wherein a liquid inlet channel and a liquid outlet channel are respectively arranged in the two jacking mechanisms; a fluid storage bottle, wherein a liquid outlet of the fluid storage bottle is communicated with the liquid inlet channel through a liquid inlet pipeline, and a pressure pump, a first pressure sensor and a second pressure sensor are arranged on the liquid inlet pipeline; and an outflow liquid volume measuring bottle, wherein a liquid inlet of the outflow liquid volume measuring bottle is communicated with the liquid outlet channel through a liquid outlet pipeline, and a third pressure sensor is arranged on the liquid outlet pipeline. The rock permeability and longitudinal and transverse wave velocity simultaneous measurement system can simultaneously realize simultaneous measurement of the permeability and the longitudinal and transverse wave velocities of the rock without respective measurement, and can effectively improve the experiment efficiency and effect.

Description

technical field [0001] The invention relates to the technical field of rock permeability and longitudinal and transverse wave velocity measurement, and more specifically relates to a joint measurement system for rock permeability and longitudinal and transverse wave velocity. Background technique [0002] At present, in the process of carbon dioxide sequestration, the injected carbon dioxide migrates under the drive of osmotic pressure, and then flows in the reservoir rocks, and then reaches a state of dynamic equilibrium, which promotes the stable and permanent storage of carbon dioxide in the geological layer Going forward, in order to avoid the leakage of carbon dioxide caused by the rupture of the reservoir in the later stage, which will cause the failure of the national environmental protection task of sequestration and carbon sequestration, it is necessary to explore the changes in the petrophysical properties of this process to predict the range of the fluid plume or t...

AI Technical Summary

Problems solved by technology

[0004] However, the existing technology and instruments can only measure the permeability or the velocity of the longitudinal and shear waves, and the wave velocity measurement results are the wave velocity value in the instantaneous state of the rock, that is, the instantaneous data at a certain point in time. Now it is necessary to simulate the entire process. Dynamic data collection and monitoring

In the past experiment process, if it is necessary to collect the P-s wave velocity value of the rock sample at a certain moment, it is necessary to dismantle the flow experiment instrument and take out the rock sample. This process will also cause the following problems. First, the rock sample after taking out It will affect the follow-up test, and sometimes even cause damage to the rock sample during the test process. After the damaged sample is taken out, it is impossible to measure the wave velocity; The state of the sample will affect the test effect

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