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

Claim 0:
1. A multi-scale photoacoustic detection method of geological structure around a borehole, comprising:
obtaining depth information and direction information of the borehole;
generating trajectory data of the borehole according to the depth information and direction information;
obtaining an optical image of the geological structure around the borehole;
generating a first velocity model according to the optical image and the trajectory data;
obtaining low-frequency acoustic wave data and high-frequency acoustic wave data of the geological structure around the borehole;
performing 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
determining the geological structure around the borehole according to the second velocity model.