Spin precession-type acoustic wave measurement ship-borne device for rock cores

Abstract

The invention relates to a spin precession-type acoustic wave measurement ship-borne device for rock cores, belonging to the field of basic physical property measurement of the rock cores. The spin precession-type acoustic wave measurement ship-borne device comprises a computer system, a data acquisition system, a pressure maintaining cabin and acoustic wave transceivers, wherein the pressure maintaining cabin is internally provided with a channel; through holes with internal threads are formed in the pressure maintaining cabin, and the acoustic wave transceivers are installed in the through holes. The spin precession-type acoustic wave measurement ship-borne device can detect the basic physical properties of the rock cores at the seabed under the in-situ condition; by adopting a flange structure, the fast docking of a pressure-maintaining transfer device can be realized, and the rapid scanning of the rock core sound waves is realized under the ship-borne condition; a polymer sleeve structure of the device solves the problem of metal diffraction; due to the unique spin precession-type structure of the acoustic wave transceivers, the problems of pressure resistance and measurement accuracy are solved; furthermore, the spacing of the acoustic wave transceivers can be rapidly changed in the rock core transfer stage and the rock core scanning stage, so that the measurement accuracyis greatly improved.

Description

Technical field [0001] The invention relates to the field of rock core basic physical property measurement, in particular to a precession type acoustic wave measurement shipboard device for rock cores. Background technique [0002] Acoustic velocity is a very important geophysical parameter. By measuring the acoustic velocity, the lithology, saturation, and in-situ sedimentary rock conditions of the submarine reservoir can be known. The acoustic velocity measured in the laboratory can provide an important reference for the interpretation of seismic exploration data, but only It is not advisable to judge the true condition of the actual reservoir by measuring the acoustic data of the core sample in the laboratory. The traditional acoustic wave measuring device is complicated because of its complicated components, poor pressure resistance and stability of the acoustic wave receiver, and insufficient measurement accuracy. Many problems such as inconvenience do not apply to the rapid...

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Problems solved by technology

[0003] In order to solve the problems that the existing acoustic wave measurement device is not suitable for ship-borne conditions, the components are complex and inconvenient to operate, the acoustic wave transmitter has poor pressure resistance and stability, and the measurement accuracy is not enough, the present invention provides a rock core screw-in type Acoustic measurement shipboard device

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