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The AAPG/Datapages Combined Publications Database
Showing 108 Results. Searched 195,364 documents.
Vertical Seismic Profiling--Processing and Analysis Case Study: ABSTRACT
James P. Disiena, Bok S. Byun, James E. Fix
AAPG Bulletin
... waves by apparent velocity. Major problems associated with these VSP data are tube wave noise and insufficient depth sampling. Optimum processing...
1981
How to Improve the Definition of Seismic Reflection Data
D. Michon, R. Garotta
Indonesian Petroleum Association
... to record. This effect depends on the apparent horizontal velocity of the signal. In fact, reflections even horizontal ones, appear slanted due...
1979
Ground Roll Removal and Signal Preservation by Cascading SVD Polarization Filters with Localized Fk-Filters; #41543 (2015)
Kristof De Meersman, Chris Ansorger
Search and Discovery.com
... too short data windows which results in over fitting the data and hence the removal of reflected signal. The CNA filter uses apparent velocity...
2015
Abstracts: Attenuating 2D Noise in a 3D World; #90173 (2015)
David C. Henley
Search and Discovery.com
... event with some “apparent velocity” determined by the slope of the event with respect to the spatial and time coordinates of the particular trace gather...
2015
Getting Something for Nothing: Noise Attenuation in an Aliased World; #41291 (2014)
David C. Henley
Search and Discovery.com
... domain using a narrow velocity range whose dip is parallel to the apparent velocity of the coherent noise. Application of short-window AGC in this domain...
2014
Long Period Long Duration Seismic Events During Hydraulic Stimulation of a Shale Gas Reservoir, #40761 (2011)
Indrajit Das, Mark D. Zoback,
Search and Discovery.com
... the apparent velocity across the array. From apparent velocity we can get the approximate angle of arrival. 0s Lag time 0.2 s Density...
2011
Wave Equation Shot Migration as a Ground Roll Filter.
Francisco Ortigosa, Pedro Muñoz
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
...) by the magnitude The points of an arbitrary straight line (fig. 1) given by f=vakx moves to another straight line f=v’akx, whose apparent velocity, slope, is given...
2008
Experience in the Use of Seismic Stations with Magnetic Recording
B. I. Bespyatov, A. I. Khramoy
Petroleum Geology: A Digest of Russian Literature
... supression of interference it is insufficient to know the kinematic data (apparent velocity); it is necessary also to take into account the dynamic...
1960
Abstract: Application of Acoustic Waveform Tomography to Marine Seismic Reflection Data Contaminated with Strong Guided Waves; #90187 (2014)
Rajesh Vayavur and Andrew. J. Calvert
Search and Discovery.com
...-K) domain filtering is of little much use, because these guided waves have a similar apparent velocity to the first arrivals. Since these guided...
2014
VSP: Lessons from Numerical Simulation
M. Suprajitno, S. A. Greenhalgh
Indonesian Petroleum Association
.... The upgoing waves (reflections) are characterised by a negative apparent velocity i.e. time increases with decreasing depth. Note how the upgoing primary...
1985
Abstract: Receiver Comparison for a Non-repeatable Earthquake Source on the Hussar 2011 Low-frequency Seismic Experiment; #90174 (2014)
Kevin W. Hall, Gary F. Margrave, and Malcolm B. Bertram
Search and Discovery.com
... have an apparent velocity across the seismic line of about 4500 m/s (ie. 4.5 km of seismic line in about one second). Receiver comparisons Geophone...
2014
Abstract: Seismic Indicators for Porous Fluid-Saturated Layer, by G. M. Goloshubin; #90951 (1996).
Search and Discovery.com
1996
Extending the Resolution of Seismic Reflection Exploration
L. R. Denham
Pacific Section of AAPG
... wavelength component is determined by a reflection’s apparent dip and frequency spectrum. Since wavelength equals apparent velocity divided by frequency...
1980
Basic Seismic Processing: Part 7. Geophysical Methods
Peter M. Duncan
AAPG Special Volumes
.... The demultiple process attempts to remove these (Yilmaz, 1987). f-k or apparent velocity filter: Acoustic signals that are not reflections from...
1992
Specialized processing of a massive distributed acoustic sensing (DAS) 3D VSP in a producing well
Ali Sayed, Francesca Twynam, Ran Bachrach, Philippe Caprioli, Marcus Holloway, Qingsong Li, Reetam Biswas, Daniel Tebo, Sam Buist
International Meeting for Applied Geoscience and Energy (IMAGE)
...apparent velocity (equations 2b and 2c) or maximum apparent wavelength (equations 2d). Figure 2: Denoise examples for DAS common noise suppression (a) f...
2023
Field Technique Design for Seismic Reflection Exploration
L. R. Denham
Dallas Geological Society
.... The minimum wavelength component is determined by a reflection’s apparent dip and frequency spectrum. Since wavelength equals apparent velocity divided...
1982
Subtle Discontinuity Detection and Mapping for Carbon Sequestration Assessment in the Illinois Basin
J. H. McBride, R. W. Keach II, H. E. Leetaru, W. J. Nelson
AAPG Special Volumes
...-apparent velocity noise) and with 2-D seismic attributes. Here we present the results of applying a tau-p-based filter in combination with reflection...
2009
Application of Seismic Surveying to Recognition of Productive Part of Gas-Oil Strata
V. V. Churlin, L. A. Sergeyev
Petroleum Geology: A Digest of Russian Literature
... of their front - apparent velocity. This feature is particularly important in the direct exploration for oil and gas pools because resolution of waves...
1963
Abstract: Application of a Tomographic Velocity Model to the Prestack Depth Migration of a Buried Valley; #90172 (2014)
Oluwafemi Ogunsuyi, Douglas R. Schmitt
Search and Discovery.com
... data is transformed from normal xt into apparent velocity versus two-way-time (radial or r-t) domain (Henley, 1999). After transformation to r-t domain...
2014
THE EARTH'S CRUST UNDER THE WILLISTON BASIN IN EASTERN SASKATCHEWAN AND WESTERN MANITOBA
Z. HAJNAL, C. M. R. FOWLER
Williston Basin Symposium
...., and R. P. Meyer, 1964, A correlation method of apparent velocity measurements, 1964: Jour. Geophys. Res., v. 63, p. 691-699...
1982
The 'Geoseis' System: Seismic Prospecting with Detonating Cord - A Line Energy Source
D. W. Thompson
Petroleum Exploration Society of Australia (PESA)
... spread. Apparent horizontal velocity Va is the horizontal velocity of events arriving at the surface where Va is given by v .. b. Split Spread Shooting...
1985
Investigation of DMO Algorithms during Test-Line Processing: Some Recommendations
Ng Tong San, Mohd. Hashim Abas, Leong Lap Sau
Geological Society of Malaysia (GSM)
... not be used solely for suppressing high velocity linear noise and lessening back scattered energy. Other filtering options are available. INTRODUCTION...
1996
Abstract: Velocity Modeling and Static Corrections for Complex near-Surface - from Alternative Solutions to Improve Seismic Imaging in Muglad Basin, by Hussein A. Ahmed; #90105 (2010)
Search and Discovery.com
2010
Subsurface seismic imaging using drill bit noise
Mehdi Asgharzadeh, Ashley Grant, Andrej Bona, Milovan Urosevic
Petroleum Exploration Society of Australia (PESA)
... in the survey, we decided to remove the linear noise with apparent velocity under 1500 m/s and frequency under 110 Hz. This was implemented by applying the FK...
2019