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Geology & Geophysics in exploration settings from surface as ground truth. Unfortunately, this

Attribute analysis procedure only works at well locations seismic alone, with limited to no well Seismic attributes are commonly and different wells can give different control to produce meaningful interval used by the oil and gas industry to wavelet estimates, thus raising the attenuation maps. facilitate interpretation of large 3D question how to predict best wavelet Robust wavelet estimation is also datasets and to effectively communi- variations away from the well. crucial for other important applica- cate subtle structural and stratigraphic

In addition, no wells are available tions, such as seismic inversion, features. Attributes can lead to simpli- in virgin exploration areas. Statistical guided interpolation of well-tie misfts, fed images of the subsurface and can methods developed in the BLISS proj- analysis of amplitude variations with detect many features at or below the ect enable accurate wavelet estimation offset, and for quality assessment resolution of seismic data. directly from the observed seismic of amplitude and phase-controlled The BLISS project set out to develop data, and have been shown to be processing. robust interpretation attributes, based robust even for relatively low-quality Deterministic wavelet estimation on spectral analysis by empirical mode recordings. is often done by means of seismic-to- decomposition.

Finally, the developed wavelet-esti- well ties, that is, by fnding the digital This decomposition was developed mation methods provide the informa- flter that matches best synthetic by researchers at NASA to facilitate tion needed by the sparse deconvolu- seismograms created from well logs to analysis of complicated nonlinear tion methods to enhance the resolution observed data. signals. Methologies developed led to of seismic data. In these cases, the well logs act high-resolution seismic attributes.

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For more information and a catalogue please contact KISWIRE at: www.kiswire.com oedigital.com September 2013 | OE 59 056_OE0913_G&G-2-Bliss.indd 59 8/18/13 8:26 PM