Investigating the impact of complex topography in sand dune areas on the application of static corrections in NC 210 seismic lines

Abstract

Sand dune interference poses significant challenges for seismic data acquisition and processing in the Murzuq Basin, southwestern Libya. The region's extensive sand dune fields introduce notable noise into seismic records, complicating data processing and generating spurious subsurface images. Additionally, the unique geomorphology of sand dunes, characterized by steep slopes and low seismic velocities, induces time delays in seismic wave propagation, resulting in distorted and inaccurate reflection data.

To address these issues, a comprehensive reprocessing effort was undertaken on three seismic lines (202, 207, and 209), totaling 12 kilometers, at the Western Geco processing center in Tripoli using Omega software. The study focused on evaluating the efficacy of various gain correction techniques; including time function gain, geometric spreading, and residual amplitude analysis compensation (RAAC). In parallel, a comparative analysis of conventional uphole and elevation static methods were conducted.

Preliminary findings suggest that the uphole method offers superior performance in mitigating static problems compared to the elevation method. A detailed assessment of the gain correction techniques is currently underway to determine their respective contributions to overall data quality improvement.