Determination of a seismic and engineering consistent petro‐elastic model for time‐lapse seismic studies: Application to the Schiehallion Field

Floricich, Mariano; MacBeth, Colin; Stammeijer, Jan; Staples, Rob; Evans, Andrew; Dijksman, Niels

doi:10.1190/1.2370196

Cited by 7 publications

(3 citation statements)

References 7 publications

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“…A multi-attribute time-lapse inversion approach is used to determine simulated saturation changes in the reservoir (Floricich et al, 2006). For this method, production data from three wells are used to calibrate each time-lapse attribute.…”

Section: Saturation Estimationmentioning

confidence: 99%

“…The above studies re-affirm that time-lapse attributes can be affected not only by production changes in the reservoir but also by overburden complexity. However, time-lapse pressure and saturation inversion schemes such as the one presented by Floricich et al (2006) depend on attributes which are assumed to represent changes driven solely by reservoir production. Thus, there is a need to explore the interaction between the acquisition and overburden, and how this ultimately affects the estimation of reservoir state.…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Overburden on Time-lapse Saturation Interpretation

Domes¹,

MacBeth²,

Brain³

2009

71st EAGE Conference and Exhibition Incorporating SPE EUROPEC 2009

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This paper studies the effect of overburden channels on saturation changes estimated from 4D seismic data. It considers the impact of source and receiver positioning in combination with a realistic overburden and reservoir structure on the ability to interpret production induced changes. The study is based on data from the Nelson field where Quaternary and Miocene age channels above the reservoir are known to cause problems when interpreting the 4D signal. Synthetic pre-stack seismic gathers are generated and processed to limited offset stacks. Interpretation of the saturation changes estimated using these post-stack data reveals contributions from spatially incoherent noise and an anomalous seismic response introduced by the presence of the channels. Most of the errors in the saturation change estimates are confined to areas directly below the channel location. For seismic attributes affected by amplitude changes alone, localised errors of as much as 30% occur below the steep dipping channel margins, which should be compared to the maximum saturation change of 45%. The absolute error in the saturation change predictions increases to 68% if the attributes are influenced by amplitude and time shift changes. The errors revealed cannot be readily predicted by considering only acquisition based repeatability metrics.

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Section: Saturation Estimationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Influence of Overburden on Time-lapse Saturation Interpretation

Domes¹,

MacBeth²,

Brain³

2009

71st EAGE Conference and Exhibition Incorporating SPE EUROPEC 2009

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show abstract

“…This again does not reveal the role of the petroelastic model sufficiently but does highlight that for most reservoirs under production and recovery, a linear relation in pore pressure and water saturation change may suffice for inversion purposes. Both of the above approaches have been used to invert for pressure and saturation changes from time-lapsed seismic data with some degree of success (Landrø 2001;Floricich et al 2006). Unfortunately, neither of the techniques can readily identify how the petroelastic model parameters manifest themselves in mapped 4D seismic signatures, this understanding would require extensive sensitivity tests using forward modelling.…”

Section: Introductionmentioning

confidence: 99%

An insightful parametrization for the flatlander's interpretation of time‐lapsed seismic data

Alvarez

MacBeth

2013

Geophysical Prospecting

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A B S T R A C TAn approximation is developed that allows mapped 4D seismic amplitudes and timeshifts to be related directly to the weighted linear sum of pore pressure and saturation changes. The weights in this relation are identified as key groups of parameters from a petroelastic model and include the reservoir porosity. This dependence on groups of parameters explains the inherent non-uniqueness of this problem experienced by previous researchers. The proposed relation is of use in 4D seismic data feasibility studies and inversion and interpretation of the 4D seismic response in terms of pore pressure and water saturation changes. A further result is drawn from analysis of data from the North Sea and West Africa, which reveals that the relative interplay between the effects of pore pressure and saturation changes on the seismic data can be simplified to the control of a single, spatially variant parameter C S /C P . Combining these results with those from published literature, we find that C S /C P = 8 appears to be a generality across a range of clastic reservoirs with a similar mean porosity. Using this C S /C P value, an in situ seismic-scale constraint for the rock stress sensitivity component of the petroelastic model is constructed considering this component carries the largest uncertainty.

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Inverting for the petro‐elastic model via seismic history matching

Stephen¹,

MacBeth²

2006

SEG Technical Program Expanded Abstracts 2006

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Determination of a seismic and engineering consistent petro‐elastic model for time‐lapse seismic studies: Application to the Schiehallion Field

Cited by 7 publications

References 7 publications

The Influence of Overburden on Time-lapse Saturation Interpretation

The Influence of Overburden on Time-lapse Saturation Interpretation

An insightful parametrization for the flatlander's interpretation of time‐lapsed seismic data

Inverting for the petro‐elastic model via seismic history matching

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