Westerngeco L.l.p.

Geco Technology B.v.

Philip Kitchenside

Colin Thomson

Alan Gaither Teague

Johan Olof Anders Robertsson

William Henry Dragoset, Jr

Jon-Fredrik Hopperstad

Clement Kostov

Robin Fletcher

Zhiming Wu

Milton A Walz

Karin Schalkwijk

Alan G Teague

Systems and methods for compensating for spatial and slowness or angle blurring of plane-wave reflection coefficients in imaging. A wave field may be determined at a reference depth proximate to a reflector for a shot record. A receiver-side blurring function may be determined at the reference depth. An aggregate blurring function may be constructed based at least partially on the source wave field and the receiver-side blurring function. A plane-wave reflection coefficients may be determined based at least partially on the aggregate blurring function.

Compensating for space and slowness/angle blurring of reflectivity

A method of processing seismic data acquired consequent to actuation of a seismic source is described. The method comprises taking the result of the following process into account when processing the seismic data where the process comprises estimating the effect of uncertainty in the position and/or orientation of the seismic source relative to the measuring receiver on processing the seismic data by estimating a source wavefield from data acquired by a near-field measuring receiver and from a first parameter set including at least one parameter indicative of the position and/or orientation of the seismic source relative to the measuring receiver, varying the value of at least one parameter of the first parameter set, estimating the source wavefield from the data acquired by the measuring receiver and from the varied first parameter set and obtaining information about the uncertainty in the estimate of the source wavefield.

Processing seismic data

Multiple Modeling, wherein the wavefield is separated into up/down wavefield on either source-side or receiver-side; wherein WEMM is used to extrapolate and predict multiples, which are attenuated from OBC seismic data.

Multiple attenuation for ocean-bottom seismic data

Methods for attenuating multiple reflections in seismic data by predicting the multiples using wavefield extrapolation modeling, which uses one-way wavefield propagation in both the up and down directions to predict internal multiples up to a specified order.

Wavefield extrapolation modeling for internal multiple prediction

Method for velocity model building and analysis using wavefield-coordinates reflection operators in wave-equation migration or reverse-time migration.

Method for velocity model building and analysis

A technique is provided for identifying an internal multiple generator in a subterranean structure. The technique includes injecting wavefields at different levels in the subterranean structure, where the different levels are proximate a predicted location of the internal multiple generator. Wavefields induced by the injected wavefields are recorded and the effect of the internal multiple generator based on the recorded wavefields is determined.

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Orpington, United Kingdom

Philip Kitchenside