--> Abstract: The Ups and Downs of Inter-Bed Multiple Attenuation, by Anatoly Baumstein, Mohamed T. Hadidi, Ramesh Neelamani, and Warren Ross; #90077 (2008)
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The Ups and Downs of Inter-Bed Previous HitMultipleNext Hit Previous HitAttenuationNext Hit

Anatoly Baumstein1*, Mohamed T. Hadidi2, Ramesh Neelamani1, and Warren Ross1
1ExxonMobil, USA
2ADCO
*[email protected]

We present a comprehensive discussion of the main steps involved in applying data-driven surface-related Previous HitmultipleNext Hit Previous HitattenuationNext Hit (SMA) and inter-bed Previous HitmultipleNext Hit Previous HitattenuationNext Hit (IMA) algorithms, illustrated with field data examples from the Middle East. Despite recent advances (e.g. Kelamis et al., 2002), inter-bed Previous HitmultipleNext Hit Previous HitattenuationNext Hit continues to present a formidable problem due to sparsity of data acquisition, noise, statics and the difficulty in distinguishing between primaries and multiples in many geologic settings. We demonstrate that accurate identification of key Previous HitmultipleNext Hit generators is an important first step in applying IMA and describe a vertical seismic profile (VSP) deconvolution technique that may be helpful in analyzing Previous HitmultipleNext Hit-generation mechanisms. Based on this analysis, we apply both post-stack (1-D) and pre-stack (1.5-D) Previous HitmultipleNext Hit Previous HitattenuationNext Hit. In the case of pre-stack Previous HitmultipleNext Hit Previous HitattenuationNext Hit, we address the data regularization procedures necessary to reconstruct the regularly and densely sampled common mid-point (Previous HitCMPNext Hit) gathers that are required for successful application of IMA. We also show that surface-related Previous HitmultipleNext Hit Previous HitattenuationNext Hit is an important step in the pre-stack case and discuss how to overcome statics-related problems that arise during the application of SMA. Finally, we describe the trade-offs involved in choosing adaptive subtraction parameters in areas with overlapping primaries and multiples. We conclude that in the target reservoir zone, the application of pre-stack Previous HitCMPNext Hit-Previous HitdomainNext Hit, data-driven, Previous HitmultipleNext Hit-Previous HitattenuationNext Hit methods resulted in significant structural interpretability improvements. The signal-to-noise ratio was further enhanced through an application of a novel post-processing curvelet-based coherent noise Previous HitattenuationTop technique, described in detail in the companion presentation by Neelamani et al.

 

AAPG Search and Discovery Article #90077©2008 GEO 2008 Middle East Conference and Exhibition, Manama, Bahrain