Processing of large offset data: experimental seismic line from Tenerife Field, Colombia

Ortega, Francisco G.; Bassrei, Amin; Gomes, Ellen de Nazaré Souza; Silva, Michelângelo Gomes da

doi:10.1590/2317-4889201820170072

Cited by 1 publication

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“…However, as previously mentioned, using the reflection time approximation presented by Alkhalifah & Tsvankin requires that the medium has anisotropic parameters (Ortega et al 2018). Figure 1b shows that for offset-depth ratios x/z < 2.0, the Al-Chalabi's approximation presents a behavior close to the observed reflection time, which was already expected for small offsets.…”

Section: Synthetic Datasupporting

confidence: 63%

Non-Hyperbolic Velocity Analysis of Seismic Data from Jequitinhonha Basin, Northeastern Brazil

Ortega

Bassrei

Gomes

2020

An. Acad. Bras. Ciênc.

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Normal moveout (NMO) velocity is used in seismic data processing to correct the data from the moveout effect. This velocity depends on the medium above the reflector and it is estimated from the adjustment of a hyperbolic function that approximates the reflection time. This approximation is reasonable for media formed by isotropic layers. For deeper exploration targets, which effectively behave as anisotropic media, the NMO velocity estimate from the hyperbolic approximation becomes imprecise. One possibility is the use of non-hyperbolic approximations for the reflection time and deeming the medium to be anisotropic. However, these approximations make the NMO velocity estimation a more complex problem, since the anisotropic parameters are unknown. In this study the NMO velocities for a vertical transverse isotropy medium are estimated using two non-hyperbolic reflection time approaches. For comparing the two methodologies that estimate NMO velocity, a 2-D dataset from Jequitinhonha Basin is used and it presents anisotropic behavior. The results show that this approach produces more consistent results than the conventional approach, which ignores the anisotropy of the medium.

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Section: Synthetic Datasupporting

confidence: 63%

Non-Hyperbolic Velocity Analysis of Seismic Data from Jequitinhonha Basin, Northeastern Brazil

Ortega

Bassrei

Gomes

2020

An. Acad. Bras. Ciênc.

Self Cite

View full text Add to dashboard Cite

show abstract

Processing of large offset data: experimental seismic line from Tenerife Field, Colombia

Abstract: Exploration seismology provides the main source of information about the

Cited by 1 publication

References 14 publications

Non-Hyperbolic Velocity Analysis of Seismic Data from Jequitinhonha Basin, Northeastern Brazil

Non-Hyperbolic Velocity Analysis of Seismic Data from Jequitinhonha Basin, Northeastern Brazil

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