Quantitative Use of Pre-Stack Timelapse Seismic for Production History Matching

Rowbotham, P J; Williamson, Paul; Marion, Donald R.; Janex, Gaël; Gosselin, Olivier

doi:10.3997/2214-4609-pdb.15.n-09

63rd EAGE Conference &Amp; Exhibition 2001

DOI: 10.3997/2214-4609-pdb.15.n-09

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Quantitative Use of Pre-Stack Timelapse Seismic for Production History Matching

P J Rowbotham¹,

Paul Williamson²,

Donald R. Marion³

et al.

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2005

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“…The work presented here was carried out, in collaboration with industrial partners, within the framework of a research project in which various seismic methodologies, such as true-amplitude prestack depth migration, reflection tomography, signal-amplitude analysis and inversion, were investigated to verify their applicability for time-lapse seismic studies (Bush et al 2000;Rowbotham et al 2001;Stucchi, Mazzotti and Terenghi 2001;Vesnaver et al 2001Vesnaver et al , 2003Hicks and Williamson 2002).…”

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confidence: 99%

Seismic preprocessing and amplitude cross‐calibration for a time‐lapse amplitude study on seismic data from the Oseberg reservoir

Stucchi

Mazzotti

Ciuffi

2005

Geophysical Prospecting

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The cross-calibration of different vintage data is an important prerequisite in attempting to determine the time-lapse seismic effects induced by hydrocarbon production in a reservoir. This paper reports the preprocessing and cross-calibration procedures adopted to modify the data of four seismic vintages (1982, 1989, 1992 and 1999) from the Oseberg field in the North Sea, for optimal conditions for a time-lapse seismic amplitude analysis. The final results, in terms of time-lapse variations, of acoustic impedance and of amplitude-versus-offset, are illustrated for selected data sets. The application of preprocessing to each individual vintage data set reduces the effects of the different acquisition and noise conditions, and leads to consistency in the amplitude response of the four vintages. This consistency facilitates the final amplitude cross-calibration that is carried out using, as reference, the Cretaceous horizon reflections above the Brent reservoir. Such cross-calibration can be considered as vintage-consistent residual amplitude correction.Acoustic impedance sections, intercept and gradient amplitude-versus-offset attributes and coherent amplitude-versus-offset estimates are computed on the final cross-calibrated data. The results, shown for three spatially coincident 2D lines selected from the 1982, 1989 and 1999 data sets, clearly indicate gas-cap expansion resulting from oil production. Such expansion is manifested as a decrease in acoustic impedance and a modification of the amplitude-versus-offset trends in the apical part of the reservoir.

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mentioning

confidence: 99%

Seismic preprocessing and amplitude cross‐calibration for a time‐lapse amplitude study on seismic data from the Oseberg reservoir

Stucchi

Mazzotti

Ciuffi

2005

Geophysical Prospecting

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Quantitative Use of Pre-Stack Timelapse Seismic for Production History Matching

Cited by 1 publication

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Seismic preprocessing and amplitude cross‐calibration for a time‐lapse amplitude study on seismic data from the Oseberg reservoir

Seismic preprocessing and amplitude cross‐calibration for a time‐lapse amplitude study on seismic data from the Oseberg reservoir

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