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The AAPG/Datapages Combined Publications Database
Showing 296 Results. Searched 200,685 documents.
Abstract: Separation of Geometric Spreading, Scattering and Intrinsic Attenuation in VSP data; #90187 (2014)
Amin Baharvand Ahmadi and Igor Morozov
Search and Discovery.com
...-mode transformations on all of the boundaries: N ei TN ,1 Ti ,i 1 i 2 0 0 , e i (4) where i is the phase shift...
2014
Abstract: An Experiment to Detect Nonlinear Seismic Responses on Exploration/Monitoring Scale; #90187 (2014)
Kris Innanen, Gary Margrave, and Malcolm Bertram
Search and Discovery.com
... take on a very noticeable relative phase shift. This appears to us at present to be the most promising trail to follow in an attempt to positively...
2014
Abstract: *Detection of Hydrocarbons from Velocity Logs using the Wavelet Coherence Analysis: A Case Study from Algerian Tight Reservoirs; #91202 (2022)
Said Gaci, Mohammed Farfour, and Saliha Amoura
Search and Discovery.com
... of correlation and phase shift against depth and scale (or wavenumber), and show a weak wavelet coherence at large scales (or small wavenumbers...
2022
2004
Integration of Depth Conversion, Seismic Inversoin and Modeling Over The Belida Field, South Natuna Sea Block "B", Indonesia
Patrick Jonklaas
Indonesian Petroleum Association
..., porosity etc. The inversion process can be broken into several stages. These are data base selection, phase and time shift determination, match, inversion...
1991
Time-Lapse Seismic Monitoring of Individual Hydraulic Frac Stages Using a Downhole Distributed Acoustic Sensing Array
Gary Binder, Aleksei Titov, Diana Tamayo, James Simmons, Ali Tura, Grant Byerley, David Monk
Unconventional Resources Technology Conference (URTEC)
... cable, dynamic strain changes can be sampled along the cable from the phase shift of light backscattered to the interrogator (Hartog, 2017). Since...
2019
Investigating Distributed Acoustic Sensing Performance for Hydraulic Fracturing Monitoring Under Controlled Conditions
Dmitry Kuznetsov, Roman Korkin, Maxim Chertov, Joel Le Calvez
Unconventional Resources Technology Conference (URTEC)
... of a strain rate. The strain rate can be expressed from the strain: η(x, t) = ϵ(x, t), and ϵ(x, t) = 2πδx(x)/λopt is the phase shift of the relative strain...
2025
Interpreting the Stratigraphy of the Baltimore Canyon Section, Offshore New Jersey With Phil, a Stratigraphic Simulator
Scott A. Bowman, Peter R. Vail
Special Publications of SEPM
... 3600 75 qe 1800 Phase Shift 900 o I 25 50 3600 100 Phase Shift I I 2700 I first segment l6 Comparison of the FIG used in this model...
1999
Sedimentological, Petrophysical, and Seismic Characterization of an Upper Jurassic Shoreface-Dominated Shelf Margin (the Boulonnais, Northern France)
H. Braaksma, J.N. Proust, J.A.M. Kenter, G.G. Drijkoningen, N. Filippidou
Journal of Sedimentary Research (SEPM)
... FRWST sands, strong negative amplitudes characterize it. Between 18 and 19 km (Fig. 10), a 180 degree phase shift should occur along the trajectory...
2006
Out-of-phase cyclical sediment supply: A potential causal mechanism for generating stratigraphic asymmetry and explaining sequence stratigraphic spatial variability
R. Bruce Ainsworth, Adam J. Vonk, Paul Wellington, Victorien Paumard
Journal of Sedimentary Research (SEPM)
... at both fourth and third order. With a 90° cyclical supply phase shift (C) a progradation-dominant asymmetrical pattern is produced at both fourth and third...
2020
Outline of Tectonic History of Bolivian Andes
H. H. Lohmann
AAPG Bulletin
... developed through the changing molecular structure of the magma--the phase shift with expansion (an exothermal process) from a stable high pressure...
1970
Facies Mapping from Three-Dimensional Seismic Data: Potential and Guidelines from a Tertiary Sandstone-Shale Sequence Model, Powderhorn Field, Calhoun County, Texas
Hongliu Zeng , Milo M. Backus , Kenneth T. Barrow , Noel Tyler
AAPG Bulletin
..., if layer response is considered, a 90° phase-shift Ricker wavelet has shorter sidelobes (Figure 21b) and is better than its zero-phase equivalent...
1996
Quantitative comparison of active and passive surface wave data obtained from distributed acoustic sensing (DAS) and three-component geophones
Koichi Hayashi, Hayato Nonaka, Peter Hubbard, Yasuhiro Yokota, Kensuke Date, Kazuhiko Masumoto, Takaaki Taira, Kenichi Soga
International Meeting for Applied Geoscience and Energy (IMAGE)
.... Figures 6 and 7 show the active shot gathers (a) generated by a sledge hammer and their phase velocity images (b) calculated by a phase shift and stack...
2022
Application of high-resolution reflection seismology to eastern Kansas cyclothems
Ralph W. Knapp
Kansas Geological Society
... m (3.3 ft) thick. Although there is a slight time-shift, one can consider the peaks to represent the "limestones" and the troughs the "shales." (Phase...
1989
A new way to enhance the resolution of surface seismic data
Qian Yu, Qing Zhou, Jiaguo Ma, Tao Yan, Lien Bian
International Meeting for Applied Geoscience and Energy (IMAGE)
... VSP data embedded in ground seismic data before (4a) deconvolution and after (4b) deconvolution (b) Figure 6：The 90 degree phase shift seismic...
2022
Review: Geophysical Methods for Karst Detection and Mapping
T. L. Dobecki
Houston Geological Society Bulletin
... the transmitters and are modified (tilt, phase shift, etc.) when they pass over conductors in the subsurface. The field gear is light, single operator...
1990
Efficient acquisition and imaging of high-resolution seismic data with the continuous wavefields method
Tilman Klver, Torben Hy
International Meeting for Applied Geoscience and Energy (IMAGE)
.... The receiver motion correction applies a spatial phase shift to the continuous data to correct for motion of the towed equipment along the sail-line...
2022
Time Frequency Gathers: An Optimal Spectral Decomposition Analysis Approach
Badsha Basu Roy
Indonesian Petroleum Association
... Proceedings, 2016 T(t) is seismic trace, H(t) is Hilbert’s transform of T(t) i.e. 900 phase shift of T(t) It is represented as positive values...
2016
Seismic Description of a Complex Carbonate Porosity System; Welch Field, Permian Basin, Texas
George P. Watts, Gregory D. Hinterlong, Archie R. Taylor
West Texas Geological Society
... bandpass filter (Figure 8). The excellent tie between the sonic and seismic reflectivity is achieved with a ninety-degree phase shift of the seismic...
1998
Permanent Reservoir Monitoring Using Fiber-Optic Technology (Geophysics Paper 22)
Steve Maas, Brett Bunn, Rune Tenghamn
Geological Society of Malaysia (GSM)
... causes a phase shift in the light as it passes through the interferometer. The phase information is extracted from the returning light to output...
2008
Integrated Seismic Characterization and Reservoir Modeling of Neocomian Fluvial System for Water Injection: Tengiz Oil Field, Republic of Kazakhstan; #20163 (2012)
Elrad Iskakov, Steve Jenkins, Zhanat Kabdesheva, and Henry W. Posamentier
Search and Discovery.com
... 90 phase shift TVD TWT max 0 Sweetness can’t distinguish separate closely spaced sand layers and overestimates sand thickness Geobody Detection...
2012
Chapter Nine: Inversion and Interpretation of Impedance Data
Rebecca B. Latimer
AAPG Special Volumes
... to that of the relative acoustic impedance data at the wells. The derived amplitude spectrum is combined with a –90° phase shift to create an operator...
2011
High-Resolution Sequence Stratigraphic Modeling 1: The Interplay of Sedimentation, Erosion, and Subsidence
Michael S. Steckler
Special Publications of SEPM
... transgressive erosion occurs during sea level rise Interestingly there is a phase shift in the relationship between the shoreline and the DSB Early...
1999
Hummocky Cross-Stratification and Megaripples: A Geological Double Standard?
Donald J. P. Swift, Albert G. Figueiredo Jr., G. L. Freeland, G. F. Oertel
Journal of Sedimentary Research (SEPM)
... flow, flow-transverse bedforms result from a phase shift between the topographic profile and the bottom shear stress profile. Normally, growth...
1983
Towards understanding the impact of the evanescent elastodynamic mode coupling in Marchenko equation-based demultiple methods
Marcin Dukalski, Christian Reinicke, Kees Wapenaar
International Meeting for Applied Geoscience and Energy (IMAGE)
... is a generalization of time reversal. The path reversal, is a context-dependent operation which reverses the phase shift for the traveling waves and exponential...
2022