SA Inversion Program: Principles and Applications

This article provides a comprehensive overview of the principles and applications of the SA inversion program, a seismic data analysis method that extracts subsurface structural information by processing seismic wave data. The core technique employed in SA inversion is "forward modeling," which simulates the propagation of seismic waves through underground media to infer geological features such as subsurface layer structures and lithological compositions. From a computational perspective, the forward modeling process typically involves solving wave equations using numerical methods like finite-difference or finite-element algorithms. The inversion component then iteratively adjusts model parameters (e.g., velocity fields) to minimize discrepancies between simulated and observed seismic data, often employing optimization algorithms such as gradient descent or genetic algorithms. SA inversion programs are widely applied in domains including seismic exploration, hydrocarbon resource identification, and geological hazard early warning systems. Consequently, proficiency in SA inversion techniques is essential for professionals in seismology and geology, particularly for those developing seismic interpretation software or conducting subsurface imaging research.