Three-dimensional two-way acoustic wave equation pre-stack imaging systems and methods
AssigneePGS Geophysical AS
InventorMatthew H. Karazincir
Life of this patent
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Abstract
A system and method for pre-stack imaging system that includes multiple processors, with each processor configured to perform two-way wave equation-based forward wave propagation of a source event to obtain a source wave field using high order spatial finite differences for a shot gather, and to perform two-way wave equation-based backward wave propagation of received waves to obtain a receiver wave field using high order spatial finite differences for the shot gather; and to correlate the source and receiver wave fields to obtain an image region.
Claims19
A pre-stack imaging system that comprises:
- multiple processors each configured to:
- perform two-way wave equation-based forward wave propagation of a source event to obtain a source wave field using high order spatial finite differences for a shot gather;
- perform two-way wave equation-based backward wave propagation of received waves to obtain a receiver wave field using high order spatial finite differences for the shot gather;
- and
- correlate the source and receiver wave fields to obtain an image region.
A pre-stack imaging method that comprises:
- obtaining multiple shot gathers for a survey region;
- obtaining a velocity cube for the survey region;
- determining a propagation time step;
- allocating each shot gather to at least one processor, said at least one processor:
- performing forward propagation of a source wavelet using a discretized high order spatial finite difference wave function to obtain a source wave field for the shot gather;
- performing backward propagation of received waves using a discretized high order spatial finite difference wave function to obtain a receiver wave field for the shot gather;
- and
- correlating the source and receiver wave fields to form a partial image;
- and displaying said partial image.
Dependencies are inferred from the claim text.