Ultrasonic detection system of quantitative contact pressure, and detection method thereof

Abstract

The invention relates to an ultrasonic detection system of a quantitative contact pressure, and a detection method thereof. The detection system comprises an ultrasonic probe, a high pressure cabin, a quantitative contact pressure adjusting unit, an environment simulation unit and a control unit; the quantitative contact pressure adjusting unit comprises a step motor and a transmission part; the motor drives the transmission part to be connected with the ultrasonic probe to realize tight coupling of a rock sample for detection and an ultrasonic receiving probe; the environment simulation unit comprises a heating module and a pressurizing module; and the heating module and the pressurizing module are connected with the high pressure cabin. The detection method is characterized in that the control unit controls the environment simulation unit and the quantitative contact pressure unit to complete the heating and pressurizing operation of the high pressure cabin and the ultrasonic detection; and a best contact point is obtained. In the invention, the nondestructive dynamic test of rocks having a high temperature and a high pressure can be carried out, a best ultrasonic detection signal can be obtained, and the gradual change and abrupt change processes of the internal structure of the sample can be finely reflected.

Description

technical field [0001] The invention relates to the field of detection of physical characteristics of rocks, in particular to an ultrasonic detection system for quantitative contact pressure under high temperature and high pressure conditions and a detection method thereof. Background technique [0002] As we all know, with the continuous excavation and exploitation of surface oil and gas fields, shallow oil and gas resources become less and less, and people began to aim at deep oil and gas fields for the exploration of oil and gas resources. To study deep oil and gas fields, it is necessary to simulate the high temperature and high pressure environment deep underground. By detecting the change of physical properties of oil-bearing rocks under different pressure and temperature conditions, the generation, change and migration of oil reservoirs can be studied, and the data have important guiding significance for the development of oil and gas fields. [0003] At present, the...

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Problems solved by technology

[0008] In order to solve the problem that the quantitative contact pressure ultrasonic testing device in the prior art cannot detect the change of the rock sample to be tested under high temperature and high pressure conditions, the present invention provides a quantitative contact pressure ultrasonic testing system and its testing method under high temperature and high pressure. The present invention adopts the supercharging and heating system to simulate the underground high temperature and high pressure environment, and at the same time absorbs the advantages of the quantitative contact pressure ultrasonic testing device, and can dynamically and finely display the measured object under the condition of gradually boosting and increasing the temperature. , the gradual change and mutation process of the internal structure

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