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Showing 63,012 Results. Searched 195,387 documents.
Abstract: Seismic Expression of Normal Faults and Associated Structures
Martha O. Withjack
Houston Geological Society Bulletin
..., but also on the velocity and dip of the overlying strata. The observed dip of a fault decreases as the velocity of the strata directly overlying...
1986
Rift-Related Structures and Their Seismic Expression: ABSTRACT
Martha O. Withjack
AAPG Bulletin
... fault surface, but also on the velocity and dip of the overlying strata. The observed dip of a fault decreases as the velocity of the strata directly...
1984
Full Use of Dipmeter Data for Geocellular Property Modeling in the McMurray Formation, Alberta; #41586 (2015)
Gregory S. Benson
Search and Discovery.com
... algorithms. The workflow is as follows: 1. Create bed co-planarity “coherency” scores using moving depth windows in dipmeter data (Figure 1 and Figure 2...
2015
AAPG Memoir 76, Chapter 15: Forward Modeling of Log Response in Geopressured Formations Reveals Valuable Insights to the Various Pore-Pressure Prediction Techniques
J. C. Rasmus
AAPG Special Volumes
... pore-pressure equivalent mud weights vs. TVD RKB using a water depth of zero. The lines represent pore-pressure equivalent mud weights ranging from...
2001
A Practical Review of Migration Issues and Solutions; #40723 (2011)
Ian F. Jones
Search and Discovery.com
..., the method of velocity model building must be tailored to the type of depth migration algorithm we intend to use. We nowadays commonly have available...
2011
Abstracts: True-Amplitude PS Prestack Time Migration via 5D Interpolation; #90173 (2015)
Peter W. Cary, Albert Zhang
Search and Discovery.com
... the velocity variations are more substantial, prestack depth migration would be more desirable ( Kristiansen et al., 2003, Miao et al., 2005). S-waves...
2015
Stratigraphic Velocity Interpretation: National Petroleum Reserve--Alaska: Chapter 12
E. W. Peikert
AAPG Special Volumes
... velocity data. Well data are used to determine interval velocity versus depth curves which reflect the normal compaction trends for various lithologies...
1985
Woollybutt 2001: A Geoscience Odyssey
D. J. Hearty, M. A. Battrick
Petroleum Exploration Society of Australia (PESA)
... velocity field derived from Pre-Stack Depth Migration (PSDM) processing. Depth conversion was completed using 3 layers and a combination of PSDM...
2002
Spherical-Wave Computational AVO Modelling in Elastic and Anelastic Isotropic Two-Layer Media; #41564 (2015)
Arnim B. Haase, Charles P. Ursenbach
Search and Discovery.com
... of seismic waves. Velocity dispersion means velocities are functions of frequency. Frequency dependence of seismic velocities can be quantified...
2015
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
3D Palaeo-Migration Pathway Analysis: An Example from the Timor Sea
G. Chen, K. C. Hill, N. Hoffman, G. W. O'Brien
Petroleum Exploration Society of Australia (PESA)
... fluid content of the rock and the increasing dominance of the matrix velocity. In this way, we can use assessments of velocity as a function of depth...
2001
Improving Petroleum System Analysis with Better Understanding of Seismic Input Uncertainties, #41235 (2013)
Ling Duan, Jianchang Liu, Richard Eisenberg
Search and Discovery.com
... velocity model building, time / depth conversion, amplitude characteristics and their implication on the lithological composition of formations, attribute...
2013
Transformation of Resistivity to Pseudovelocity Logs: GEOLOGIC NOTE
Albert J. Rudman , Joseph F. Whaley , Robert F. Blakely , Maurice E. Biggs
AAPG Bulletin
.... Pseudovelocity logs transformed from resistivity log (R) by using three different scale functions of Figure 2. Resistivity (R) in ohm-m and transit time (TT...
1976
An Overview of Ray Trace Modeling with an Example from the Wichita Mountain Front in Southern Oklahoma
Jan Dodson, Roger A. Young, Kevin Smart
Oklahoma City Geological Society
... Oklahoma was used. The ray trace model was designed to replicate post-stack seismic data. VELOCITY-DEPTH MODEL Three intermediate steps were necessary...
2001
Gas Hydrates in Ocean Bottom Sediments
M. K. MacLeod
AAPG Bulletin
... of the hydrate are converted to two-way travel time using three typical velocity functions for deep marine sediments containing gas hydrates (proprietary...
1982
Effective Use of High Density VSP Measurements to Predict Pore Pressure and Estimate Mud Weight Ahead of Drilling in the Mahakam Delta, Indonesia
Mohammed Badri, Stephane Gazet, Gregoire de Tonnac
Indonesian Petroleum Association
... Technology VSP methodology has several key applications such as time versus depth relationship, interval and average velocity calculations, calibration...
2005
Sedimentologic and Physical Oceanographic Evidence of a Shelf Edge Counter Current Off Guinea Bissau, Guinea and Sierra Leone
David W. McGrail
Journal of Sedimentary Research (SEPM)
... for the calculation of the Ekman number. Commonly, the scale of choice for E is a mean depth characterizing the area of interest. By using a horizontal scale...
1977
Abstract: Prestack Depth Migration with the Gabor Transform; #90211 (2015)
Yongwang Ma and Gary Margrave
Search and Discovery.com
... migration algorithm using the Gabor transform with application to the Marmousi acoustic dataset. The imaging results show a very promising depth imaging...
2015
Pre-Stack Imaging: Time or Depth? (Paper 25)
Carl Notfors, Peter Whiting, Geoff Mansfield
Geological Society of Malaysia (GSM)
... depth migration is only a moderate improvement over that. The velocity model for pre-stack depth migration was generated using reflection tomography...
2000
Synthetic Seismograms from Vibracores: A Case Study in Correlating the Late Quaternary Seismic Stratigraphy of the New Jersey Inner Continental Shelf
Dominic Esker , Robert E. Sheridan , Gall M. Ashley , Jeffrey S. Waldner , David W. Hall
Journal of Sedimentary Research (SEPM)
..., and depositional sequence systems tracts. B) Bulk density and C) compressional wave velocity vs. depth. Velocity is plotted as the inverse transit time, in µs/ft...
1996
How to Make Velocity Corrections
John W. Daly
AAPG Bulletin
... always yields straight-line trajectories. The angle of dip is computed by the formulas shown in the figure, using the surface velocity. Probably...
1944
Graphical Method for Calculating Dip and Strike from Continuous Dipmeters
B. Osborne Prescott
Tulsa Geological Society
... and strike using continuous-dip-meter data may be computed by a simple, graphical method. Except for borehole drift, the calculation is a straightforward...
1955
Reservoir Modeling in the Bunyu Tapa Gas Field — an Integrated Study
Ramatias Ramli, Susanto Budi Nugroho, John Bradfield, Steve Hansen
Indonesian Petroleum Association
... Correlation of BSU - 1. Velocity/Depth Mapping The stacking velocities were employed in the Velocity Mapping Module to produce a depth structure map...
1993
Shear Velocity Prediction and its Rock Mechanic Implications, #41296 (2014)
Yexin Liu, Zhuoheng Chen, Kezhen Hu
Search and Discovery.com
... velocity and density can be inverted using current advanced pre-stack seismic inversion technique from seismic AVO angle gathers (Russell et al. 2005). Like...
2014
Application of Seismic Surveying to Direct Exploration for Oil and Gas
A. M. Ivanchuk, L. F. Tarkhova
Petroleum Geology: A Digest of Russian Literature
...-bearing strata on attenuation and velocity of seismic waves. Field studies have shown that the decrease in velocity of propagation at pools reaches...
1974