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The AAPG/Datapages Combined Publications Database
Showing 18,066 Results. Searched 195,372 documents.
Fault Shadow Issues and Resolution in Model and Real Data
Andrew J. Davidoff, Ika Ratna Novianti
Indonesian Petroleum Association
.... Fault shadows are caused by rapid lateral velocity changes across the fault plane. These lateral velocity variations are not always properly accommodated...
2002
Seismic Depth Interpretation in Thrustbelts, by Nancy House, #40131 (2004).
Search and Discovery.com
2004
Image - Rays and the Treatment of Inhomogeneity in Migration
L. Hatton
Southeast Asia Petroleum Exploration Society (SEAPEX)
... be considered. It has already been intimated that focussing and de-focussing (i.e. convergence and divergence) of image-rays caused by lateral velocity...
1980
Attributes Assisted Seismic Interpretation in Pre-Stack Time Versus Depth Migration Data
Search and Discovery.com
N/A
Abstract: Enhancement of Static Correction by Turning-Ray Tomography, by Djarfour Noureddine and Mender Mourad; #90077 (2008)
Search and Discovery.com
2008
Abstracts: Near-surface Velocity Model Building and Statics in Permafrost Regions; #90173 (2015)
Tianfei Zhu, Yan Yan, and Jon Downton
Search and Discovery.com
... of the strong lateral velocity variations and negative velocity gradients present in these regions. The negative gradients prevent the application...
2015
Abstracts: Application of CSP Gather Modeling for Determination of Velocity Smoothing Operator for Prestack Kirchhoff Depth Migration; #90173 (2015)
Hassan Khaniani and John C. Bancroft
Search and Discovery.com
... that have lateral velocity variations. In the second part, using a numerical example, we compared the constructed wavefronts from ray based and finite...
2015
Geomechanical Approach to Resolve Severe Velocity Variations and Remove Image Distortions below Rugose Seafloor (Paper A16)
S. Birdus, A. Artyomov, L. Li, S. Xin
Geological Society of Malaysia (GSM)
...Geomechanical Approach to Resolve Severe Velocity Variations and Remove Image Distortions below Rugose Seafloor (Paper A16) S. Birdus, A. Artyomov, L...
2012
An Interpreter's Guide to Improvements in Depth Imaging through Model-Based Velocity Estimation and Refinement
Andy Furniss
Petroleum Exploration Society of Australia (PESA)
... that time migration will image seismic reflections in their correct spatial position, most are aware that this is not the case where lateral velocity...
1999
An Interpreter's Guide to Improvements in Depth Imaging Through Model-Based Velocity Estimation and Refinement
Andy Furniss
Indonesian Petroleum Association
... in areas of low dip without lateral or vertical velocity variations or faults but unfortunately, these areas are rarely of interest to us in the search...
2000
Derivation of Seismic Depth Sections
H. Buchholtz, W. Houba
Geological Society of Malaysia (GSM)
... applied in many examples, experience also shows that this approach leads to inaccurate results in case of strong lateral velocity variations...
1987
Reservoir Description by Interferometric Imaging of VSP Data in Transition Zones
Thomas Radford, Martin Karrenbach, Ferry Yustiana, Willi Brianno, Dhea Wachju
Indonesian Petroleum Association
... flank (right). Figure 17 - Interferometic multiple pre-stack depth migration with velocity model overlay, 50ft lateral and 10ft vertical image grid...
2013
Imaging in Complex Environments Common Reflection Angle Migration
Graham A. Winbow
Indonesian Petroleum Association
... amplitude or first arrival). Illumination is an issue because significant lateral velocity variation produces significant laterally varying ray...
2007
Chapter 10-part 3: 3-D Depth Image Interpretation
William L. Abriel, Joseph P. Stefani, Robert D. Shank, David C. Bartel
AAPG Special Volumes
.... One very important concept that needs to be understood is the sensitivity of seismic imaging to variations in overlying earth velocity, and why depth...
2011
Simultaneous Joint Inversion of Seismic and Gravity Data for Long Offset Pre-Stack Depth Migration in Northern Oman, #41569 (2015).
D. Colombo, M. Mantovani, M. De Stefano, D. Garrad, Hussain Al Lawati
Search and Discovery.com
... imaging is a difficult task especially when sharp lateral and vertical velocity variations are present. The problem becomes even more serious when...
2015
Seismic Imaging of the SW South China Sea Deep Crustal Structure Shows Evidence for a Ductile Lower Crust during Rifting; #30404 (2015)
M. Delescluse, T. Pichot, N. Chamot-Rooke, M. Pubellier, Y. Qiu, G. Sun, J. Wang, J.-L. Auxiètre
Search and Discovery.com
... and crustal scale lateral velocity variations. Ongoing processing of the MCS line shows that these lateral variations correlate well with seismic reflection...
2015
Pre-Stack Imaging: Time or Depth? (Paper 25)
Carl Notfors, Peter Whiting, Geoff Mansfield
Geological Society of Malaysia (GSM)
... which uncovered some lateral velocity variations, but not enough to make major changes to the seismic image. The improvement obtained by pre-stack...
2000
High-resolution imaging using least-squares migration in the image domain (LSMi) for a marine distributed acoustic sensing (DAS) 3D-VSP
Ali Sayed, Francesca Twynam, Ran Bachrach, Maud Cavalca, Leo Leon, Maria Shadrina, Qingsong Li, Reetam Biswas, Daniel Tebo, Sam Buist
International Meeting for Applied Geoscience and Energy (IMAGE)
... was developed to account for the lateral variations in attenuation. LSMi was adapted for the DAS 3D-VSP survey to reduce the effects of variable illumination...
2023
Forward Modeling to Improve Seismic Acquisition Design
Paula A.C. Barbosa, Jose A. Jaramillo, Jose H. Olaya
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
... of the area —e.g., the Chusma Subthrust, and its effect in lateral and vertical velocity variations. Horizontal displacements between CRP and CDP...
2006
A Nigerian Renaissance: Renewed interest in Africa's largest oil producer
John Balch, Matt Lamont, Polarcus, DownUnder GeoSolutions
GEO ExPro Magazine
... unaliased, with variable depth sampling output from the migration. There were no assumptions made about lateral or vertical velocity variations, apart...
2014
AAPG Memoir 76, Chapter 18: Velocity Estimation for Pore-Pressure Prediction
David W. Bell
AAPG Special Volumes
... and other lateral velocity variations. The second, related, assumption made in deriving the Dix equation is that stacking velocity is the same...
2001
Anisotropic depth migration in the Colombian Llanos Foothills as a key to understanding the structure in depth
emamedov
Search and Discovery.com
... anisotropy and lateral-velocity heterogeneity. The final anisotropic-depth-migrated image confirms the structure and moves the imaged structure...
Unknown
Anisotropic Depth Migration Applied in an Area of the Colombian Llanos Foothills as a Tool for Understanding the Structure in Depth
Isabel Cristina Florez, Rob Vestrum
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
...-position error on the subsurface targets, we predicted that correcting for anisotropic and lateral-velocity effects would improve the image of subsurface...
2006
Imaging Subsurface Structures Under Gas Clounds by Multi-Component Technology
Xiaogui Miao, Loh Fong Cheen, Libo Zi, Jing Du, Magali Beele, Jacques Bonnafe, Natalia Anggriani, Gilles Vallon, Claudio Strobbia
Indonesian Petroleum Association
...; Lateral velocity variations; Vertical striping of seismic energy level; Fault shadow effects; Strong shear wave statics. The following Figure 2...
2014
Abstract: A Phase Shift Plus Interpolation Extrapolation for Two-way Wave Equation Migration; #90172 (2014)
Jianhua Pan
Search and Discovery.com
... without lateral variations. For the constant velocity in the interval ( z 0 , z 0 nz ) , it is easy to check that P( z 0 nz ) cos(nk z z ) P( z...
2014