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The AAPG/Datapages Combined Publications Database
Showing 947 Results. Searched 195,452 documents.
Crustal Structure in Gulf of Mexico from OBS Refraction and Multichannel Reflection Data
A. K. Ibrahim, J. Carye, G. Latham, R. T. Buffler
AAPG Bulletin
... was obtained indirectly to give the correct depth of the OBS. Linear segments of traveltime curves were interpreted from the record section and fitted...
1981
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
ABSTRACT: Reflection Seismology in Azimuthally Anisotropic Media, by Leon Thomsen; #91038 (2010)
Search and Discovery.com
2010
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: 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
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
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
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
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
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
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
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
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
Phase-Ray Maslov Summation: A Complete Finite-Frequency Ray Method
Tianfei Zhu
Search and Discovery.com
.... It is, for example, a key element of the Kirchhoff migration algorithm which has been a major tool over the past decade for prestack depth imaging...
Unknown
Phase-Ray Maslov Summation: A Complete Finite-Frequency Ray Method
Tianfei Zhu
Search and Discovery.com
.... It is, for example, a key element of the Kirchhoff migration algorithm which has been a major tool over the past decade for prestack depth imaging...
Unknown
EXTENDED ABSTRACT: Advances and Challenges in Seismic Data Processing and Imaging for Geologically Complex Areas
Rubén D. Martínez
GCAGS Transactions
...-processing steps, depth velocity model building and depth migration algorithms could not possibly deliver useful seismic depth images for structural...
2011
Multiscale insights into the Mount Weld REE deposit from 2D and 3D active seismic survey data
Thomas Bell, Greg Turner, Ganesh Bhat, Brad Knell
International Meeting for Applied Geoscience and Energy (IMAGE)
.... between the 3200m/s velocity contour and the depth of weathering independently observed in drill cuttings (shown by the transition from cyan to blue...
2023
Towards Quantitative Assessment of 4D DAS Time Shifts for Enhanced Stimulated Rock Volume Characterization
Yesser Haj Nasser
Unconventional Resources Technology Conference (URTEC)
... and the starting depth of every stimulation stage. After Haj Nasser (2022). The monitor P-wave velocity after stimulating stage 38, shown with the blue curve...
2022
Generation and evolution of overpressure caused by hydrocarbon generation in the Jurassic source rocks of the central Junggar Basin, northwestern China
Xiaowen Guo, Sheng He, Keyu Liu, Zhi Yang, Shengqiang Yuan, and Mingliang Liu
AAPG Bulletin
.... The well-log responses of the overpressured mudstones and seismic velocity characteristics indicate that the top depth of the overpressure zone...
2019
Abstract: Integrated Analysis and Inversion of 3D Refraction Travel Times; #90171 (2013)
Igor B. Morozov and Atul Jhajhria
Search and Discovery.com
... parameterization, an initial subsurface model is automatically derived from the travel times and is further refined by iterative, non-linear travel-time...
2013
Seismic Stratigraphy of the Bahamas
John W. Ladd , Robert E. Sheridan
AAPG Bulletin
... to the Great Isaac well, we find the depth of reflection R to be 1,560 ± 100 m (1.34-sec two-way traveltime) and the depth of reflection P to be 1,930...
1987