METHOD FOR SEISMIC MONITORING USING COMBINED OBSERVATION SYSTEM Russian patent published in 2025 - IPC G01V1/00 G01V1/18 G01V1/28 G01V1/30 G01H9/00 G01V8/24 

FIELD: physics.

SUBSTANCE: invention relates to seismic exploration and seismic monitoring and can be used for high-density areal and profile seismic survey, and seismic monitoring on land and on water areas with possibility of recording different types of waves. Disclosed is a method of obtaining seismic images, comprising steps of arranging three-component seismic sensors on a regular spatial network with step 10-20 times greater than the seismic wavelength; laying the fibre optic cable is performed in such a way that the cable line in series connects the points of installation of the three-component sensors and a quality acoustic contact is provided between the cable and the ground, performing simultaneous recording of seismic vibrations using three-component sensors through a data collection system and using a fibre optic cable through an interrogator; analysing the detected by the three-component sensors oscillations polarization, performing the required type and the incidence direction selection of the reference signal using the processing unit; performing coherent filtration of data recorded by the fibre-optic cable by means of an interrogator, and a reference signal: selecting, in the data recorded by the fibre-optic cable, a wave component having maximum coherence with the reference signal at points of installation of three-component sensors using a processing unit; treating the signal extracted as a result of coherent filtration as a seismic wave of the corresponding type, recorded along the cable line with a step which satisfies the resolution of the distributed seismic sensor (no more than 10 metres), and processing and interpreting said signal using a processing unit; seismic images are obtained.

EFFECT: obtaining highly detailed seismic images, providing independent estimation of velocities of longitudinal and transverse waves, high quality of predicting reservoir properties and other parameters of deposits.

4 cl, 1 dwg