Suppression of seismic related multiples is still a major challenge in the seismic processing industry despite recent and incremental technological advances. The presence of multiples in the recorded data negatively affects state-of-the-art imaging and quantitative inversion processes, resulting in ambiguous interpretation, fracture and reservoir characterization products, increasing the uncertainty when exploring and developing energy playing fields. The level of contamination and complexity of multiples depends on many variables such as overall geological environment, desired exploration target depth and extent, seismic operational and acquisition configuration, among other factors. The appropriate approach to suppress these multiples also changes according to these variables. Successful multiple attenuation projects nowadays require a broad portfolio of techniques and workflows aiming to isolate and address specific components from a different type of observed multiples. Methods of choice rely on how complex the multiple contamination and quality of the recorded data/assumptions are, aiming to maximize the attenuation effectiveness while minimizing the overall process cost.
In this presentation we will look at surface and internal multiple suppression processes, covering its practical aspects, assumptions and challenges. We will emphasis on state-of-the-art methods largely applied in the seismic industry. Depending on the subsurface complexity and field maturity, different techniques and workflows are in place to maximize the attenuation of multiples while preserving underlying primary reflections. This presentation will also show examples from a selection of seismic experiments, demonstrating the relevance of seismic multiple suppression, followed by a brief road ahead discussion.