Patent ID: 11892577
Assignee: INSTITUTE OF ROCK AND SOIL MECHANICS, CHINESE ACADEMY OF SCIENCES
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 17:
18. A multi-scale photoacoustic detection device of geological structure around a borehole, comprising:
a controller and a borehole probe; wherein,
the borehole probe comprises a plurality of acoustic receiving transducers, arranged sequentially along an axial direction of the borehole probe;
the controller is configured to:
obtain depth information and direction information of the borehole;
generate trajectory data of the borehole according to the depth information and direction information;
obtain an optical image of the geological structure around the borehole;
generate a first velocity model according to the optical image and the trajectory data;
obtain low-frequency acoustic wave data and high-frequency acoustic wave data of the geological structure around the borehole;
perform a full waveform inversion on the first velocity model according to the low-frequency acoustic wave data and the high-frequency acoustic wave data to obtain a second velocity model; and
determine the geological structure around the borehole according to the second velocity model.