A modeling approach to wide-azimuth design for subsalt imaging

Regone, Carl

doi:10.1190/1.2405331

Cited by 62 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The objective of the survey would then be to illuminate and image that model in an optimal way. Many authors have come up with proposals for model-based survey design (e.g., Slawson et al, 1995;Salehi and Kappius, 1998;Regone, 2006Regone, , 2007. The approach is to take a proposed geometry and to analyze subsurface illumination (of the model) using ray tracing or finite-difference modeling.…”

Section: Model-based Survey Designmentioning

confidence: 99%

“…For instance, for a locally shallow target, such as around salt domes, one may want to know whether variable line spacing would be called for -narrow line spacing across the Alvarez et al, 2004). Also, when deciding whether to use highly expensive wide-azimuth techniques for subsalt exploration (Regone, 2006(Regone, , 2007, a great deal of reassurance can be extracted from carrying out model studies.…”

Section: Model-based Survey Designmentioning

confidence: 99%

“…Even more time consuming is 3D finite-difference modeling (Regone, 2006(Regone, , 2007. As a consequence, the number of shots computed must be limited, so not every geometry can be modeled realistically.…”

Section: Model-based Survey Designmentioning

confidence: 99%

“…The power of prestack noise analysis in orthogonal geometry is not investigated. Before the first wide-azimuth towed-streamer surveys were conducted, a lot of modeling was carried out (Regone, 2006(Regone, , 2007, but the poor quality of the aft shots ( Figure 5.39) was not foreseen.…”

Section: Model-based Survey Designmentioning

confidence: 99%

See 3 more Smart Citations

3D Seismic Survey Design, Second edition

Vermeer¹

2012

View full text Add to dashboard Cite

Section: Model-based Survey Designmentioning

confidence: 99%

Section: Model-based Survey Designmentioning

confidence: 99%

Section: Model-based Survey Designmentioning

confidence: 99%

Section: Model-based Survey Designmentioning

confidence: 99%

See 2 more Smart Citations

3D Seismic Survey Design, Second edition

Vermeer¹

2012

View full text Add to dashboard Cite

“…Application of this method is demonstrated by Moldoveanu et al ͑2003͒ andBrink et al ͑2004͒. Because computational power is increasing, it is expected that methods based on the full sequence of 3D modeling and migration will gain interest ͑e.g., Jurick et al, 2003;Regone, 2006͒. Nevertheless, this sequence is currently too laborious to be used for an acquisition design procedure because that requires an iterative application.…”

Section: Introductionmentioning

confidence: 99%

Acquisition geometry analysis in complex 3D media

2008

View full text Add to dashboard Cite

Increasingly, we must deal with complex subsurface structures in seismic exploration, often resulting in poor illumination and, therefore, poor image quality. Consequently, it is desirable to take into consideration the effects of wave propagation in the subsurface structure when designing an acquisition geometry. We developed a new, model-based implementation of the previously introduced focal-beam analysis method. The method's objective is to provide quantitative insight into the combined influence of acquisition geometry, overburden structure, and migration operators on image resolution and angle-dependent amplitude accuracy. This is achieved by simulation of migrated grid-point responses using focal beams. Note that the seismic response of any subsurface can be composed of a linear sum of grid-point responses. The focal beams have been chosen because any migration process represents double focusing. In addition, the focal source beam and focal detector beam relate migration quality to illumination properties of the source geometry and sensing properties of the detector geometry, respectively. Wave-equation modeling ensures that frequency-dependent effects in the seismic-frequency range are incorporated. We tested our method by application to a 3D salt model in the Gulf of Mexico. Investigation of well-sampled, all-azimuth, long-offset acquisition geometries revealed fundamental illumination and sensing limitations. Further results exposed the shortcomings of narrow-azimuth data acquisition. The method also demonstrates how acquisition-related amplitude errors affect seismic inversion results.

show abstract