Ultrasonic longitudinal and shear wave-resistivity integrated type probe for rock physical experiment

Abstract

The invention discloses an ultrasonic longitudinal and shear wave-resistivity integrated type probe for a rock physical experiment as well as a preparation method and a using method of the ultrasonic longitudinal and shear wave-resistivity integrated type probe. The integrated type probe comprises a probe substrate-resistivity measurement electrode (1) and a sound insulation sleeve body which covers the top of the probe substrate-resistivity measurement electrode; four longitudinally stacked copper foil electrodes (2) are adhered to the top of the probe substrate-resistivity measurement electrode (1) from bottom to top; a shear wave piezoelectric ceramic piece Sh (3), a longitudinal wave piezoelectric ceramic piece P (4) and a shear wave piezoelectric ceramic piece Sv (5) are adhered among the adjacent copper foil electrodes (2) respectively; the four copper foil electrodes (2) are in solder connection with an Sh negative / resistivity electrode end line (6), an Sh positive / P negative electrode end line (7), a P positive / Sv negative electrode end line (8) and an Sv positive electrode end line (9) respectively; and the electrode end lines penetrate to the outer part of the sound insulation sleeve body. The ultrasonic longitudinal and shear wave-resistivity integrated type probe can simultaneously measure a longitudinal wave speed, two shear wave speeds and resistivity of a rock sample, so that the experiment efficiency is greatly improved.

Description

technical field [0001] The invention relates to a probe, in particular to an ultrasonic longitudinal and transverse wave-resistivity integrated probe for petrophysical experiments. It belongs to the technical field of analysis and measurement control. Background technique [0002] In order to improve the exploration and development efficiency of underground oil and gas reservoirs, people hope to obtain as detailed and reliable underground petrophysical properties as possible. Geophysical logging is the main technology to obtain different physical properties of underground rocks in engineering. Among them, acoustic logging and resistivity logging are the two most widely used logging techniques. In order to better interpret the acoustic logging data and resistivity logging data, researchers need to experimentally measure the ultrasonic properties of rocks (such as P-wave velocity, S-wave velocity, P-wave attenuation, Shear wave attenuation, etc.) and resistivity, to establi...

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Problems solved by technology

[0006] At present, the measurement of rock ultrasonic velocity and resistivity in the laboratory is carried out separately, so that it is necessary to repeatedly assemble the measurement device and repeatedly form the temperature and pressure conditions required for the experimental measurement. The experimental workload is large and the efficiency is low.

On the other hand, because it is difficult to ensure that the experimental conditions of the two measurements are exactly the same, the analysis uncertainty of the correlation between the acoustic wave velocity and the resistivity increases

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