Seismic Acquisition Optimization in Thrust Belts and Foreland Basins

Abstract

Nodal systems technology introduced a very important uplift in operational efficiency in seismic acquisition. The primary goal of the survey design was to optimize geometries to take advantage of the operational efficiency from the nodal systems. We present examples of optimized nodal acquisition from Peru and Bolivia. A further step in this evolution is the development of the compressive technology integrated supported by nodal systems. This more cost-efficient 3D seismic acquisition allows us to improve the signal/noise and image quality by the integration of non-uniform optimal sampling acquisition and its reconstruction by compressive sensing techniques. This process requires the use of reconstruction techniques combined with forward modeling to ensure proper wavefield sampling to keep the integrity of seismic recovery from a sparser subset. Therefore, a new survey design workflow is required to support feasible non-uniform geometries for effective noise removal and enhanced pre-stack migration imaging. The application of this new methodology will need to challenge the irregularities from complex surface conditions existing in the Andean basins for the non-uniform optimal sampling acquisition to support data reconstruction.

AAPG Datapages/Search and Discovery Article #90326 © 2018 AAPG Latin America & Caribbean Region, Optimizing Exploration and Development in Thrust Belts and Foreland Basins. Santa Cruz de la Sierra, Bolivia, June 6-8, 2018