Generating enhanced seismic velocity models using geomechanical modeling

A system, comprising:

• at least one processing device;
• and
• a memory storing instructions that, when executed by the at least one processing device, cause the at least one processing device to:
• obtain raw seismic data;
• receive the raw seismic data and generate a first tomographic velocity model based on received raw seismic data, the first tomographic velocity model specifying an interval velocity for each of a plurality of subsurface layers;
• generate one or more initial seismic images based at least partially on the first tomographic velocity model;
• generate a geomechanical model based at least partially on received geomechanical data and the one or more initial seismic images, the geomechanical model specifying, for each of the plurality of subsurface layers, gravitational loading and thermal loading values and corresponding displacements or velocities at lateral or basal surfaces of the subsurface layers;
• and
• generate a plurality of geomechanical outputs by performing one or more geomechanical simulations using the geomechanical model;
• generate a geomechanical velocity model based at least partially on the geomechanical outputs including the gravitational loading and thermal loading values and corresponding displacements or velocities at lateral or basal surfaces of the subsurface layers, the geomechanical velocity model specifying a primary wave propagation velocity and a secondary wave propagation velocity for each of the plurality of subsurface layers;
• and
• generate a second tomographic velocity model based at least partially on the first tomographic velocity model and the geomechanical velocity model, the second tomographic velocity model specifying an updated interval velocity for each of the plurality of subsurface layers based on the primary wave propagation velocity and the secondary wave propagation velocity for each of the plurality of subsurface layers.

One or more non-transitory computer readable media storing instructions that, when executed by at least one processing device, cause the at least one processing device to perform operations comprising:

• generating a first tomographic velocity model based on received raw seismic data, the first tomographic velocity model specifying an interval velocity for each of a plurality of subsurface layers;
• generating one or more initial seismic images based at least partially on the first tomographic velocity model;
• generating a geomechanical model based at least partially on received geomechanical data and the one or more initial seismic images, the geomechanical model specifying, for each of the plurality of subsurface layers, gravitational loading and thermal loading values and corresponding displacements or velocities at lateral or basal surfaces of the subsurface layers;
• generating a plurality of geomechanical outputs by performing one or more geomechanical simulations using the geomechanical model;
• generating a geomechanical velocity model based at least partially on the geomechanical outputs including the gravitational loading and thermal loading values and corresponding displacements or velocities at lateral or basal surfaces of the subsurface layers, the geomechanical velocity model specifying a primary wave propagation velocity and a secondary wave propagation velocity for each of the plurality of subsurface layers;
• and
• generating a second tomographic velocity model based at least partially on the first tomographic velocity model and the geomechanical velocity model, the second tomographic velocity model specifying an updated interval velocity for each of the plurality of subsurface layers based on the primary wave propagation velocity and the secondary wave propagation velocity for each of the plurality of subsurface layers.