The main difficulties for processing seismic data in Wintershall’s onshore concessions in the Libyan Sirte Basin are the presence of severe noise, high-amplitude surface related multiples and internal reverberations that are interfering and partially masking the primary signal, and some localized complexities in the overburden. This paper discusses the application of a cascaded de-multiple approach that resulted in a significant enhancement of the structural image of the 3D seismic dataset in concession 96. The paper illustrates some of the practical aspects of applying data-driven (SRME/IME) multiple removal techniques. In particular, the pre-conditioning of data is discussed, as well as how existing methodologies can be modified to optimally subtract the predicted multiples from the data, while preserving weak primaries. Optimized parameterization and processing strategies, the ample use of QC measures and high-end visualization tools, and the experience of the seismic interpreter all contributed to the successful application of data-driven multiple attenuation.
展开▼
