Experimental device and method for measuring rock mechanics parameters under action of ultrasonic wave and chemistry

Abstract

The invention discloses an experimental device and a method for measuring rock mechanics parameters under action of ultrasonic wave and chemistry. The experimental device comprises a closed box body for placing a rock core to be tested, a rock mechanics testing machine for symmetrically loading the rock core to be tested from a left side and a right side through a left side loading shaft and a right side loading shaft, an ultrasonic transducer, an ultrasonic generator, a hydraumatic pressurizer, a vent valve arranged on the upper part of the closed box body, a pressure measurement unit, an ultrasonic power detector, an ultrasonic amplitude measuring instrument and a display unit. The experimental method comprises the following steps of: 1, preparing an experiment; 2, adding a chemical reagent; 3, carrying out ultrasonic treatment; and 4, booting loading and simultaneously carrying out rock mechanics parameter measurement in a loading process. The experimental device has a reasonable design, is convenient to install and arrange, has complete functions, is simple and convenient to use, has good use effect, and can be used for efficiently and quickly finishing a rock mechanics parameters measuring experiment of the rock core to be tested under the joint action of the ultrasonic wave and the chemical reagent.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics parameter measurement, and in particular relates to an experimental device and method for rock mechanics parameter measurement under ultrasonic and chemical action. Background technique [0002] Ultrasound is a sound wave with a frequency higher than 20,000 Hz. It has good directionality, strong penetrating ability, and is easy to obtain concentrated sound energy. Ultrasound can be divided into power ultrasound and detection ultrasound according to its application field. Among them, the application of power that uses ultrasound to change objects and physical properties is called power ultrasound. [0003] With the development of ultrasonic technology, detection ultrasound and power ultrasound have been more and more widely used in the petroleum industry. Ultrasonic detection is mainly used in acoustic logging, downhole ultrasonic imaging, petrophysical property testing, non-destructive te...

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Problems solved by technology

At present, the application of ultrasound in rock mechanics is mainly concentrated in the ultrasonic non-destructive testing of rock mass, which belongs to the category of ultrasonic detection. There are few studies on the changes of reservoir rock mechanical parameters and properties (constitutive relationship, tensile strength, compressive strength, shear strength, elastic modulus, Poisson's ratio, etc.) , Ultrasonic-chemical combined plugging removal and other technologies have a certain degree of blindness in the field application. The root cause is the lack of experimental means matching the research, which hinders the promotion and application of ultrasonic oil recovery technology to a certain extent.

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