Deep Structure of Northern Mississippi Embayment

A. Ginzburg , W. D. Mooney , A. W. Walter , W. J. Lutter , J. H. Healy

AAPG Bulletin

...-velocity 7.3-km/sec basal layer. The base of the crust ranges from a 39 km (24 mi) depth at the southern end of the profile to a 46 km (29 mi) depth...

Resolution limits of fluid overpressures from mineralogy, porosity, and sonic velocity variations in North Sea mudrocks

Christian Hermanrud, and Oddgeir Undertun

AAPG Bulletin

..., observed deviations from reference velocity versus depth trends are converted to pore pressure changes with little or incomplete analyses of potential...

Tomographic Velocity Images by Artificial Neural Networks

Search and Discovery.com

A depth uncertainty estimation system with prestack seismic data

Huafeng Liu, Andrey H. Shabelansky, Jinsong Chen, Min Yang, Cory J. Hoelting, Ying Tan

International Meeting for Applied Geoscience and Energy (IMAGE)

... is surface offset, 𝒗 𝒏𝒎𝒐 and 𝜼 𝒆𝒇𝒇 are effective NMO velocity and effective Eta, respectively, 𝑡0 and 𝑡 𝑥 are two-way traveltime at 0 and x offset...

A Statistical Approach to Assessing Depth Conversion Uncertainty on a Regional Dataset: Cooper-Eromanga Basin, Australia

David Kulikowski, Catherine Hochwald, Dennis Cooke, Khalid Amrouch

Petroleum Exploration Society of Australia (PESA)

...(12), 1678-1678. Baerg, J.R., 1991, Traveltime in media with linear velocity-depth functions: Consortium for Research in Elastic Wave Exploration...

Estimation of anisotropic parameters from semblance picking using dynamic programming

Hong Liang, Houzhu (James) Zhang, Dongliang Zhang, Hongwei Liu, Xu Ji

International Meeting for Applied Geoscience and Energy (IMAGE)

... velocity can be converted to interval velocity, which is used as the initial model for depth-domain model building (Ferla and Cibin, 2010). We can follow...

ABSTRACT: Multiple suppression by the CRS technique; #90051 (2006)

Juergen Pruessmann, Martin Tygel, Fernando Gamboa, Radu Coman

Search and Discovery.com

... from a subsurface model, or from seismic data attributes. Such information is required in the case of land data, where high -velocity rocks may...

Results of Seismic Surveying with Surface Sources of Excitation in the Pripyat Depression

A. L. Kauzov, I. B. Krylov, A. I. Luginets, I. I. Rotfel’d

Petroleum Geology: A Digest of Russian Literature

... are becoming increasingly important. A comparison is made here of the geologic information displayed in time sections of common-depth-point surveying...

Revealing the discontinuities by 3D prestack diffraction separation and imaging

Chuangjian Li, Suping Peng, Xiaoqin Cui, Peng Lin

International Meeting for Applied Geoscience and Energy (IMAGE)

.... obtain the NMO velocity by the velocity analysis process; 2. calculate the corresponding midpoint and zero-offset traveltime of the sample point...

Analog Model and Synthetic Seismogram Studies of Long Range Refraction Method: ABSTRACT

Stanley J. Laster, Richard Schell, Milo M. Backus

AAPG Bulletin

... 1772 47 9. (September) Refraction mapping of a simple anticline in a high velocity halfspace overlain by low velocity overburden in an analogue model...

A fast sweeping method based on coordinate transformation for eikonal equation on unstructured triangular meshes

Xin Chen, Danping Cao, Xin Fu

International Meeting for Applied Geoscience and Energy (IMAGE)

... of velocity, and we set 𝐺 = (0,0.3) in the example. The analytical solution of traveltime is 𝑇= 𝑎𝑟𝑐𝑐𝑜𝑠ℎ 1...

Attributes Assisted Seismic Interpretation in Pre-Stack Time versus Depth Migration Data; #41637 (2015)

Tengfei Lin, Hang Deng, Zhifa Zhan, Zhonghong Wan, Kurt Marfurt

Search and Discovery.com

... lateral velocity variations, conventional time migration data has some pitfalls, which may lead to misinterpretation. Depth migration data possesses...

Extended Abstract: Advances and Challenges in Seismic Data Processing and Imaging for Geologically Complex Areas

Ruben D. Martinez

GCAGS Transactions

... velocity model building and depth migration algorithms could not possibly deliver useful seismic depth images for structural interpretation...

Wave scattering by the formation velocity perturbation surrounding a fluid-filled borehole

Zhou-Tuo Wei

International Meeting for Applied Geoscience and Energy (IMAGE)

.... At this time, the scattered field by the velocity variations no longer satisfy the first-order linear approximation condition. From Figure 5...

Abstract: Prestack Signal Enhancement by Non-hyperbolic MultiFocusing; #90187 (2014)

Evgeny Landa, Alex Berkovitch, and Kostya Deev

Search and Discovery.com

... of observation geometry, near surface velocity and 5 unknown parameters:,  s ,  r , R s , Rr , L . COMF traveltime formulas provide an adequate...

Abstract: High-Resolution Seismic Velocity Structure of the Shallow Porcupine Basin From Traveltime Tomography and Waveform Inversion of Long-Streamer Data; #90310 (2017)

Manel Prada, François Lavoué, Brian O'Reilly, Sergei Lebedev, Yanhua Yuan, Clàudia Gras

Search and Discovery.com

...Abstract: High-Resolution Seismic Velocity Structure of the Shallow Porcupine Basin From Traveltime Tomography and Waveform Inversion of Long...

Mapping with Two-Dimensional Seismic Data: Part 7. Geophysical Methods

I. R. Gordon

AAPG Special Volumes

... a time map and a depth map. During conversion from time to depth, a velocity gradient map compensates for lateral changes in velocity, which is preferable...

Amplitude and Bandwidth Recovery Beneath Gas Zones Using Kirchhoff Prestack Depth Q-Migration

Jonathan Liu, Peter Traynin, J. M. Reilly

Indonesian Petroleum Association

... Kirchhoff Prestack Depth Q-migration is efficient computation of traveltimes and amplitudes. Let c(x) be a complex velocity in a viscoacoustic medium...

Abstracts: Determining Elastic Constants of an Orthorhombic Material by Physical Seismic Modeling; #90173 (2015)

Faranak Mahmoudian, Gary F. Margrave, P. F. Daley, and Joe Wong

Search and Discovery.com

... of Calgary. Theory The linear expression for P phase velocity in geophysics discipline comes from the work of Backus (1965) as:  v 2  n   cijkl ni...

Azimuthal Velocity Analysis of 3-D Pre-Stack Seismic Data for Fracture-Induced Anisotropy in the Altamont-Bluebell Field

Khaled Al Dulaijan, Gary Margrave

Unconventional Resources Technology Conference (URTEC)

...ffset two-way traveltime, x is the offset, ܸ௙௔௦௧ and ܸ௦௟௢௪ are the fast and slow NMO velocities respectively, ߚ௦ is the azimuth of the slow NMO velocity...

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Ehsan, Athar

Search and Discovery.com

... and stratigraphic features. From the dispersion relation, grid sizes adapted to local velocity with depth, which not only simulated wavefields with higher...

Abstract: 3D Time Domain Full Waveform Inversion Based on Multiscale Adapted Variable Grid Method Case Study Majunga Basin East African Coast; #91204 (2023)

Mukiibi Ssewannyaga Ivan, Jian-Ping Huang, Zi-Ying Wang, Jidong Yang, Jin Keji

Search and Discovery.com

... velocity with depth, which not only simulated wavefields with higher accuracy but also accelerated the calculation during the implementation of FWI. Our...

Abstracts: The Conventional and Non-conventional Seismic Differencing; #90173 (2015)

Vanja Vracar and Robert J. Ferguson

Search and Discovery.com

... modelling Stoffa et al. (1990) introduce the SSF migration algorithm, which handles lateral changes in velocity at each depth level taking dipping...

An Inverse Approach for Relating Seismic Velocity and Overpressure to Permeability and Sedimentation History in Deep Basins, #40863 (2012)

Hector M. Moreno, Tim A. Minshull, Rosemary A. Edwards,

Search and Discovery.com

... evolution with depth and an empirical law for the permeability as a function of porosity. Model output has been used to estimate the P wave velocity...

The calculation of first-arrival P-wave traveltime for attenuating TTI media

Mengxiu Wang, Jingyi Chen, Zhengcong Zhao, Kaiyuan Ji, Shaoying Chang

International Meeting for Applied Geoscience and Energy (IMAGE)

... independent of the quasi S-wave attenuation coefficient As 0 and the impact of the S-wave velocity vso on the traveltime is weak and negligible. Thus, Hao...