Characterization of a fractured granitic pluton: P- and S-waves' seismic tomography and uncertainty analysis

Martí, David; Carbonell, Ramón; Viruete, Javier Escuder; Pérez-Estaún, Andrés

doi:10.1016/j.tecto.2006.05.012

Cited by 12 publications

(11 citation statements)

References 45 publications

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“…Finally, the results are compared to asses which model fits the data the best. This method is also used to test the reliability of the starting model in a inversion scheme and the stability of the results (Korenaga et al, 2000;Sallarès et al, 2003;Martí et al, 2006). In this method every iteration is independent from the previous one and no information is inherited for every new case.…”

Section: Metropolis Simulationsmentioning

confidence: 99%

Study on the limitations of travel-time inversion applied to sub-basalt imaging

Flecha

Carbonell²,

Hobbs³

2013

Solid Earth

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Abstract. The difficulties of seismic imaging beneath high velocity structures are widely recognised. In this setting, theoretical analysis of synthetic wide-angle seismic reflection data indicates that velocity models are not well constrained. A two-dimensional velocity model was built to simulate a simplified structural geometry given by a basaltic wedge placed within a sedimentary sequence. This model reproduces the geological setting in areas of special interest for the oil industry as the Faroe-Shetland Basin. A wide-angle synthetic dataset was calculated on this model using an elastic finite difference scheme. This dataset provided travel times for tomographic inversions. Results show that the original model can not be completely resolved without considering additional information. The resolution of nonlinear inversions lacks a functional mathematical relationship, therefore, statistical approaches are required. Stochastic tests based on Metropolis techniques support the need of additional information to properly resolve sub-basalt structures.

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Section: Metropolis Simulationsmentioning

confidence: 99%

Study on the limitations of travel-time inversion applied to sub-basalt imaging

Flecha

Carbonell²,

Hobbs³

2013

Solid Earth

Self Cite

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show abstract

“…Finally, the results ara compared to asses which model fits the data the best. This method is also used to test the reliability of the starting model in a inversion scheme and the stability of the results (Korenaga et al, 2000;Sallarès et al, 2003;Martí et al, 2006).…”

Section: Metropolis Simulationsmentioning

confidence: 99%

Study on the limitations of traveltime inversion in the presence of extreme velocity anomalies

Flecha¹,

Carbonell²,

Hobbs³

2013

Preprint

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The difficulties of seismic imaging beneath high velocity structures are widely recognised. In this setting, theoretical analysis of synthetic wide-angle seismic reflection data indicates that velocity models are not well constrained. A two-dimensional velocity model was built to simulate a simplified structural geometry given by a basaltic wedge placed within a sedimentary sequence. This model reproduces the geological setting in areas of special interest for the oil industry as the Faroe-Shetland Basin. A wide-angle synthetic dataset was calculated on this model using an elastic finite difference scheme. This dataset provided travel times for tomographic inversions. Results show that the original model can not be completely resolved without considering additional information. The resolution of nonlinear inversions lacks a functional mathematical relationship, therefore, statistical approaches are required. Stochastical tests based on Metropolis techniques support the need of additional information to properly resolve subbasalt structures

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“…Seismic inversion is a relatively effective technique for the quantitative study of reservoirs using velocity information (Martí et al 2006). 3D seismic inversion can provide the volume of wave impedance, which reflects the interval velocity variance.…”

Section: Well-log-constrained Inversion For Fracture Reservoirs Of Bumentioning

confidence: 99%

Geophysical evaluation methods for buried hill reservoirs in the Jiyang superdepression of the Bohai Bay basin, eastern China

Wu¹,

Dong²,

Yu³

et al. 2007

J. Geophys. Eng.

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The Jiyang superdepression is one of the richest hydrocarbon accumulations in the Bohai Bay basin, eastern China. Comprehensive seismic methods have been used in buried hill exploration in Jiyang to describe these fractured reservoirs better. Accurate seismic stratigraphic demarcation and variable-velocity mapping were applied to reveal the inner structure of the buried hills and determine the nature of the structural traps more precisely. Based on the analysis of rock properties and the characteristics of well-developed buried hill reservoirs, we have successfully linked the geology and seismic response by applying seismic forward technology. Log-constrained inversion, absorption coefficient analysis and tectonic forward-inversion with FMI loggings were applied to analyse and evaluate the buried hill reservoirs and gave satisfying results. The reservoir prediction was successful, which confirmed that the comprehensive utilization of these methods can be helpful in the exploration of buried hill reservoirs.

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Characterization of a fractured granitic pluton: P- and S-waves' seismic tomography and uncertainty analysis

Cited by 12 publications

References 45 publications

Study on the limitations of travel-time inversion applied to sub-basalt imaging

Study on the limitations of travel-time inversion applied to sub-basalt imaging

Study on the limitations of traveltime inversion in the presence of extreme velocity anomalies

Geophysical evaluation methods for buried hill reservoirs in the Jiyang superdepression of the Bohai Bay basin, eastern China

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