Extending MAZ PSDM velocity model building to land context using controlled beam migration, a case study

Abstract

3D marine and land dense wide-azimuth (WAZ) and multiazimuth (MAZ) acquisition and processing has taken off in the industry with the associated development of specific tools for WAZ/MAZ processing. For land data, wideazimuth information actually exists since the early 3D acquisition as land data is wide-azimuth by nature. However and unless we talk about recent dense land acquisition with short distance between source and receiver lines and very high density of receivers and source points, land data is usually limited by its trace density and its noise content. By gathering different techniques such as Common Offset Vector (COV), Controlled Beam Migration (CBM) and MAZ tomography, we present in this paper a workflow allowing the use of recent WAZ processing tools in land context without requirements of high trace density and the benefits of using such sequence on the data quality.