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The AAPG/Datapages Combined Publications Database
Showing 1,098 Results. Searched 200,685 documents.
Abstract: Regular Grids Travel Time Calculation Fast Marching with an Adaptive Stencils Approach; #90187 (2014)
Zhengsheng Yao, Mike Galbraith, and Randy Kolesar
Search and Discovery.com
... a fixed source in isotropic media, has the form ( ) ( ) Here x, and z are spatial coordinates, (1) is the traveltime (eikonal), and v is the velocity...
2014
Beam Migration for Imaging of Complex Structures
Karl Schleicher, John Sherwood, Lynn Comeaux, Mazin Farouki
Indonesian Petroleum Association
... are then iterated until a satisfactory velocity model is developed for which the common reflection point depth gathers are adequately flat. The final...
2009
Maximising the value of 2D hard rock seismic acquisition at Escondida Porphyry Copper Mine
Heather Schijns, Gabriel Madero
Petroleum Exploration Society of Australia (PESA)
... vibrator sources were used in a crossline configuration to deliver a 32s linear sweep from 8-120 Hz for each shot. Escondida is one of the largest open...
2019
Anisotropic PP and PSv Prestack Depth Migration of 4C (OBC) Seismic Data, Offshore Trinidad
Tony Johns
Search and Discovery.com
..., as opposed to polar anisotropy (VTI/TTI) accounted for in traveltime ray tracing of prestack depth migration, can cause shear waves to split into fast (S1...
Unknown
Anisotropic PP and PSv Prestack Depth Migration of 4C (OBC) Seismic Data, Offshore Trinidad
Tony Johns
Search and Discovery.com
..., as opposed to polar anisotropy (VTI/TTI) accounted for in traveltime ray tracing of prestack depth migration, can cause shear waves to split into fast (S1...
Unknown
ABSTRACT: Reflection Seismology in Azimuthally Anisotropic Media, by Leon Thomsen; #91038 (2010)
Search and Discovery.com
2010
Velocity model building from 3D surface seismic data at the Utah FORGE EGS site
Yun-Ha Jung, Nori Nakata, Sea-Eun Park, Ju-Won Oh
International Meeting for Applied Geoscience and Energy (IMAGE)
... the inverted velocity model with available well-log data, we observe distinct three depth zones, unconsolidated alluvium, consolidated alluvium...
2024
Abstract: Interferometric Assessment of Clamping Quality of Borehole Geophones; #90224 (2015)
Yoones Vaezi and Mirko van der Baan
Search and Discovery.com
... correlation functions can consequently be inverted for 2D and 3D velocity structures. Body waves may also be extracted from SI of closely-spaced receivers...
2015
Characterizing seismic anisotropy and AVO using walkaway VSP: Willow oilfield, Alaska
Manish Lal Khaitan, Ali Sayed, Shujaat Ali, Trey Wagner, Jonathan Scorer, Brett Wendt
International Meeting for Applied Geoscience and Energy (IMAGE)
...-depth relationship along the well, interval velocity profile, and a corridor stack. The interval velocity was used to calibrate the compressional sonic...
2022
Stop Treating Diffractions as Noise Use them for Imaging of Fractures and Karst; #120057 (2012)
Mark Grasmueck, Tijmen Jan Moser, and Michael A. Pelissier
Search and Discovery.com
... discontinuities such as edges and corners. When intersecting two thin and flat open fractures the linear intersection causes tipwaves at both ends connected...
2012
Permeability prediction in chalks
M. Monzurul Alam, Ida Lykke Fabricius, Manika Prasad
AAPG Bulletin
..., doi:10.1144/1354-079306-707.Fabricius, I. L., L. Gommesen, A. Krogsboll, and D. Olsen, 2008, Chalk porosity and sonic velocity versus burial depth...
2011
Multicomponent Seismic Studies of the Gas-hydrate System at the Storegga Slide
Stefan Bunz, Jurgen Mienert, Karin Andreassen
AAPG Special Volumes
... (18044265 ft) (Figure 4a). The BSR is shallowest with 860 ms twt (two-way traveltime) beneath the sea surface (180 ms twt subbottom depth) in the vicinity...
2009
Effect of near offset seismic data in shallow subsurface modeling using full-waveform inversion
Md Iftekhar Alam, Salman Abbasi
International Meeting for Applied Geoscience and Energy (IMAGE)
... are documented to show the effect of velocity gradient on the depth of investigation with variable model dimensions. Three model dimensions were compared from...
2024
Semi-global multiparameter FWI using public cloud HPC
Henry A. Debens, David Knodel, Fabio Mancini, Darryl Harris, Mike Warner, Adrian Umpleby
International Meeting for Applied Geoscience and Energy (IMAGE)
... the shallow-water platform. (a) Legacy pre-stack time migration (PreSTM) velocity model and full stack, stretched to depth; (b) re-processed pre-stack...
2022
P- and S-Wave Velocity Structures of the Sigsbee Abyssal Plain of the Gulf of Mexico from Ocean Bottom Seismometer Data
Sangmyung D. Kim, Seiichi Nagihara, Yosio Nakamura
GCAGS Transactions
...P- and S-Wave Velocity Structures of the Sigsbee Abyssal Plain of the Gulf of Mexico from Ocean Bottom Seismometer Data Sangmyung D. Kim, Seiichi...
2000
Considerations in Azimuthal Processing and Velocity Inversion for Unconventional Plays
Michael J. Perz, William Keller, Victor Kriechbaum
Unconventional Resources Technology Conference (URTEC)
... of lateral velocity heterogeneity and/or orthorhombic anisotropy may cause complex traveltime distortions (even at modest propagation angles) which...
2018
Automated velocity modeling with domain transformations
Kevin Gullikson, Arnab Dhara, Ram Tuvi, Mrinal K. Sen
International Meeting for Applied Geoscience and Energy (IMAGE)
... time to depth domain by integrating the predicted velocity model. This pipeline is capable of predicting a velocity model suitable for input to FWI...
2024
Seismic Imaging and Interpretive Model Building in the Colombian Andes
Rob Vestrum
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
.... Depth migration in thrust-belt environments like the Colombian Andes requires an interpretive approach to building a depth-migration velocity model...
2006
Seismic imaging in Tarim Basin: Overcoming complex near-surface conditions
Xianhuai Zhu, Ruirui Zhao, Sam Gray, Wensheng Duan, Duoming Zheng, Ganglin Lei, Gengxin Peng, Rujie Zhang, Kun Xu, Grace Yan, Junru Jiao
International Meeting for Applied Geoscience and Energy (IMAGE)
... has significantly improved the robustness of estimating near-surface velocity-depth models, resulting in enhanced resolution of deep reservoir images...
2024
A Comparison between Geostatistical Inversion and Conventional Geostatistical-simulation Practices for Reservoir Delineation
C. Torres-Verdn, A. Grijalba-Cuenca, H. W. J. Debeye
AAPG Special Volumes
... of geostatistical inversion is the need to convert well-log data from depth to seismic traveltime. In addition, geostatistical inversion may be rendered...
2006
Abstract: Converted-Wave Prestack Time Migration with a New Approximate Migration Weight; #90224 (2015)
Chuck Ursenbach and Peter Cary
Search and Discovery.com
.... t0 is the two-way vertical traveltime, with z the vertical distance to the image point and v the velocity of the homogeneous medium. CMP...
2015
Nonparametric Bayesian approach for robust depth uncertainty estimation from seismic velocity and anisotropy tradeoffs
Jinsong Chen, Sizhuang Deng, Min Yang, Andrey Shabelansky, Cory Hoelting, Huafeng Liu, Maisha Amaru
International Meeting for Applied Geoscience and Energy (IMAGE)
...Nonparametric Bayesian approach for robust depth uncertainty estimation from seismic velocity and anisotropy tradeoffs Jinsong Chen, Sizhuang Deng...
2024
Using Reflected Phases to Improve Depth Resolution of Microseismic Source Locations from Single-Well Observations
James Rutledge, Nobukazu Soma
Unconventional Resources Technology Conference (URTEC)
... of trial depth positions, matched their arrivals to ray-trace arrivals from two distinct velocity boundaries while also honoring the direct P...
2013
Towards wave-equation ambient noise tomography of a landslide: The Harmalière case study
Giuseppe Provenzano, Grégory Biévre, Romain Brossier, Stéphane Garambois, Ludovic Métivier
International Meeting for Applied Geoscience and Energy (IMAGE)
...-wave velocity (Vp ) by 3D first-arrival traveltime tomography (TT). The ambient noise dataset is dominated by surface waves, down to frequencies as low...
2024
Triangular impulse tests for stratified gravity inversion
Guibao Liu, Hua-Wei Zhou
International Meeting for Applied Geoscience and Energy (IMAGE)
...) to invert for the interface geometry of model layers of constant velocity contrasts, and show an example with a 2D salt model. To quantify...
2022