A new approach to compensate for illumination differences in 4D surveys with different individual acquisition geometries

Didier Lecerf; Martin Besselievre

doi:10.3997/1365-2397.n0073

ISSN: 0263-5046
E-ISSN: 1365-2397

A new approach to compensate for illumination differences in 4D surveys with different individual acquisition geometries
Authors Didier Lecerf¹, Martin Besselievre²
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Affiliations: ¹ PGS ² Geokinetics, formerly PGS
Source: First Break, Volume 36, Issue 2, Feb 2018, p. 71 - 76
DOI: https://doi.org/10.3997/1365-2397.n0073
- Published online: 01 Feb 2018

Abstract

Successful time-lapse (or 4D seismic) studies require special care when it comes to the removal of undesirable artifacts caused by the differences in acquisition geometries. By attempting to repeat the source and receiver geometries between surveys as precisely as possible any subsequent 4D noise is minimized so that subtle seismic signal variation induced by reservoir production can be detected. It is commonly accepted that the required repeatability accuracy is directly linked to the desired sensitivity and resolution of the 4D signal. Illumination studies prior to any 4D experiments ensure that the reservoir is illuminated in as identical a fashion as possible between base and monitor survey so that the desired 4D effects can be recovered. In fact, it is common practice to plan and design 4D surveys with optimal acquisition repeatability in mind.

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2024-04-18

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References

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A new approach to compensate for illumination differences in 4D surveys with different individual acquisition geometries

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A new approach to compensate for illumination differences in 4D surveys with different individual acquisition geometries

Abstract

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