Data description and preprocessing

The Mobil AVO data set includes seismic data and both petrophysical and well-log information from two wells that intersect with the seismic line. The seismic data consist of 1012 shot gathers recorded with an air gun source array with a shot interval of 25 meters. Each shot gather contains 120 traces with a receiver spacing of 25 meters.

The original data were significantly contaminated with free-surface and water-bottom multiples that makes identification of the primary reflections difficult. Lumley et al. 1995 preprocessed the data set so that it can be used for amplitude-preserved data processing. They applied a source and receiver consistent amplitude balancing to the seismic data and a time-domain conjugate-gradient multiple suppression technique to remove multiple reflection energy. Figure  shows a near-offset section and Figure  shows three CMP gathers that were corrected for time-varying spherical divergence N (1973), in addition to the preprocessing by Lumley et al. 1995.

 

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Figure 1 Near-offset section of Mobil AVO dataset.

 

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Figure 2 CMP gathers section of Mobil AVO dataset.