A novel direct probabilistic inversion using seismic pre-stack data as input to characterize a wedged chalk reservoir prospect was demonstrated from the Upper Cretaceous unit, Danish North Sea. The objective better resolve lateral extent and pinch-out of in frontier exploration setting compare results with more traditional deterministic geostatistical modeling. provided additional insights that...

impedance (AI) and a parameter related to shear-wave velocity from seismic data, our ability to discriminate between different lithologies and fluid phases will increase. Prestack inversion on individual CDP gathers and inverting directly for VP, VS, and density have been tested in several ways, but the estimated parameters are often poorly determined. A more robust approach is to apply poststa...

Substantial progress has occurred during the past 15 years in development of shallow CDP seismic-reflection techniques, but there are occasional interpretation problems with the resulting data. We discuss examples of the pitfalls of the method, along with some procedures to help avoid them. Problems that often occur include spatial aliasing of ground roll, interpreting processed ground-coupled ...

(c) 2015, SEG. This is an author produced version of the paper 'Beckwith, JA and Clark, R (2015) Estimating frequency-dependent attenuation quality factors in pre-stack surface seismic data. In: Schneider, RV, (ed.) SEG Technical Program Expanded Abstracts 2015. 2015 Society of Exploration Geophysicists Annual Meeting, 18-23 Oct 2015, New Orleans, USA. Society of Exploration Geophysicists , pp....

In seismic data analysis, recorded data often are transformed to various domains to discriminate against coherent and incoherent noise. For instance, by mapping a shot record from time-space domain to frequency-wavenumber domain, coherent linear noise can be attenuated. Similarly, by mapping a common-midpoint gather from time-space to timevelocity domain (velocity stacks) multiples are separate...

Seismic image and velocity models were obtained from a newly conducted seismic survey around the Integrated Ocean Drilling Program (IODP) Japan Trench Fast Drilling Project (JFAST) drill site in the Japan Trench. Pre-stack depth migration (PSDM) analysis was applied to the multichannel seismic reflection data to produce an accurate depth seismic profile together with a P wave velocity model alo...

Modern seismic surveys with higher-precision numerization (24-bits A/D converters) have led to ever increasing amounts of seismic data. Management of these large datasets becomes critical, not only for transmission, but also for storage, processing and interpretation. Compression algorithms have been proposed in the geophysicists' community over the past few years as a way to e ectively manage ...

A subband lter bank is applied to decompose seismic stack sections. The lter bank is designed to give almost perfect reconstruction and maximum coding gain. A variable bit rate coding scheme is used on the sub-band signals. Blocks of subband samples are dynamically classiied into diierent classes according to the blockwise root mean-square value. Each subband sample is then quantized in a unifo...