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The AAPG/Datapages Combined Publications Database
Showing 5,181 Results. Searched 196,194 documents.
PINNslope: Physics-informed neural network slope prediction and interpolation with positional encoding
Francesco Brandolin, Matteo Ravasi, Tariq Alkhalifah
International Meeting for Applied Geoscience and Energy (IMAGE)
... encoding. Specifically, Nx and Nt (number of encoding frequencies in time) are chosen (empirically) to be different from each other. Seismic data present...
2023
Chapter 5: Seismic Trace Inversion
Tom Wittick
North Texas Geological Society
... to be in a shale sequence and looking for a sand. The sand velocity is different from the shale velocity but by only a few percent rather than the 20+ percent...
1992
Seismic Trace Inversion
Abilene Geological Society
... it is typical to be in a shale sequence and looking for a sand. The sand velocity is different from the shale velocity but by only a few percent...
1993
Broadband Seismic Technology and Beyond: Part VI: Towards a Ghost-Free Solution
Lasse Amundsen, Martin Landrø, Eivind Frømyr
GEO ExPro Magazine
.... The multi-level source concept puts guns, clusters or sub-arrays at different depths and fires them sequentially so that only the down-going waves build up...
2013
Wave Modeling and Hydrodynamics
J. Ian Collins
Special Publications of SEPM
... gL gL c gT 211 Speed Length 211 c 211 d gT tanh tanh h L h L T T for d L 0 05 C Vid Tvgd L 411 d C Group Velocity 1 C gT v...
1987
Fracture Identification and Evaluation Using S Waves, by Bob Hardage, #40792 (2011).
Search and Discovery.com
2011
Fluid and Sediment Dynamics on Continental Shelves
Donald J. P. Swift and Alan W. Niedoroda
Special Publications of SEPM
... indicates the relative amounts of energy expended in fluid motion of different frequencies. G: geostrophic frequency, D:diurnal tidal frequency, I...
1986
Basic Seismic Processing: Part 7. Geophysical Methods
Peter M. Duncan
AAPG Special Volumes
... differences and near-surface velocity changes at different source and receiver stations must be removed. The relative elevation of each shot...
1992
Earth crustal analysis of Northwest Sabah region inferred from receiver function method
Abdul Halim Abdul Latiff, Faridah Othman
Geological Society of Malaysia (GSM)
... of S-waves is around 60% of that P-waves. However, the velocity varies according to the material composition of the medium in which it travels. S waves...
2020
Segregating Porosity-Permeability Transform Using Elocity and Pore Structure in Carbonate Rock
Albertus Ditya, Gregor P. Eberli, Don McNeill, James Klaus
Indonesian Petroleum Association
... the Choquette and Pray classification (1970), corresponds to a different deviation of acoustic velocity from the Wyllie’s time average. The characteristics...
2015
Wave-Formed Sedimentary StructuresA Conceptual Model
H. Edward Clifton
Special Publications of SEPM
... Geological Survey California 94025 ABSTRACT produced by shoaling waves can be integrated into a conceptual model based on velocity um velocity asymmetry d...
1987
Revealing a Shaly (Tight) Sand Reservoir's Distribution by Applying an Untapped Sub-Frequency Combination Method: A Case Study in the West Jambi II Block, South Sumatra Basin
Indra Luthfiana, C. Maya Resha Tuhar, Endi Erfanto, Randy Condronegoro, Hendra Niko Saputra, Abghia Dini Fanzuri, Yan Wijaya, Totok Parafianto
Indonesian Petroleum Association
... for different frequencies. A Wavelet is defined as a mother function (t) єL2 (R) with zero mean, which is localized in both time and frequency...
2018
Joint VTI and Mud Slowness Inversion Using Multiple Modes and Adaptive Weighting
Mark Collins
Unconventional Resources Technology Conference (URTEC)
... isotropy (VTI) (i.e., anisotropy with a vertical axis of symmetry). In such a case, a shear wave polarized in the horizontal plane has a different speed than...
2013
Seismic Activity in the Central Gulf Coast Basin
Eugene R. Brumbaugh
New Orleans Geological Society
... onshore is so much more usable than the old 6 fold data. The effect geophone group spacing has on acquiring higher frequencies has already been...
1991
Abstract: Estimation of Q-factor and Phase Velocity Using the Recovered Stress-strain Relaxation Spectrum; #90172 (2014)
Dali Zhang, Michael P. Lamoureux, Gary F. Margrave
Search and Discovery.com
... that the complex velocity V () or complex modulus M ( ) can be measured at sample data point of frequencies k (k 1,2,, N ) where N is the total number...
2014
First-Arrival Traveltime Inversion in the CMP Domain: Method and Application
Search and Discovery.com
.... These differences are caused by the statics values computed based on the different near-surface velocity models that were generated by the two different algorithms...
2013
A Method for Reducing the Effects of Base Plate Distortion
S. A. Sorkin
Pacific Section of AAPG
... of base plate distortion can be serious, especially when using a down sweep. Any harmonic frequencies present in the signal being cross-correlated...
1972
An Analysis of a Seismic Reflection from the Base of a Gas Hydrate Zone, Offshore Peru (1)
JOHN J. MILLER , MYUNG W. LEE , and ROLAND VON HUENE
AAPG Bulletin
... using a different, time- and space-invariant velocity function (called constant velocity migration, or CVM). A migration velocity model that varied...
1991
Acquisition and Ananlysis of Wide-Angle Reflection and Refraction Seismic Data
Paul L. Stoffa
Circum Pacific Council Publications
...), we sum the traveltime contributions from each layer. T-p Traveltimes v + q Considering a stack of horizontal constant velocity layers of thickness...
1989
Sorting of Sediments in the Light of Fluid Mechanics
Douglas L. Inman
Journal of Sedimentary Research (SEPM)
... by the average velocity u, the velocity at any instant, u, is the vector sum of the average velocity and a random fluctuation related to turbulence. This may...
1949
Theory and Applications of Time Series Analysis to Wireline Logs: Chapter 5
John H. Doveton
AAPG Special Volumes
... Research Group, 1990). End_Page 111------------------------ constraints within ancient sequences are a common problem. Consequently, a different...
1994
Amplitude Recovery of Digitally Recorded Data
Roy O. Lindseth
Pacific Section of AAPG
... is directly related to changes in lithology, characterized by velocity and density variations. Properly recovered amplitude data can be mapped...
1972
Sediment Dispersal Pattern Off an Eroding Delta on the West Coast of Taiwan
James T. Liu, Ray T. Hsu, Jeong-Shang Huang, Shenn-Yu Chao
Special Publications of SEPM
... patterns suggest that different grain sizes have different responses to various hydrodynamic processes on the shoreface, and therefore, they can...
2003
Weathervaning Characteristics of Tankers Connected to Single Point Moorings
A. T. Brumley, A. E. Potts
Southeast Asia Petroleum Exploration Society (SEAPEX)
... by finding the vector sum of the current velocities to find the total velocity incidence direction and then finding the coefficient for the vector...
1996
Geophysical Techniques Used in Petroleum Exploration in the Ying Ge Hai Area, Zhanjiang, SW Guangdong Province, China
L. William Edwards
Circum Pacific Council Publications
... of instantaneous phase method for line 278A-33. Figures 25 to 27 show three different versions of the color interval velocity for lines 278-33...
1989