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The AAPG/Datapages Combined Publications Database
Showing 43,226 Results. Searched 195,387 documents.
Abstract: Array Analysis of Surface Microseismic Data from the Rolla Microseismic Experiment; #90174 (2014)
Katarina Seckarova and David W. Eaton
Search and Discovery.com
... which 30 events were analyzed to determine backazimuth and apparent velocity. This was accomplished by using a velocity analysis procedures similar...
2014
erformance of Seismic Arrays in the Presence of Weathering Layer Variations, #41841 (2016).
Jubran Akram, Abdullatif A. Al-Shuhail
Search and Discovery.com
... as compared to the entire array length. Introduction A receiver array response is defined as the sum of outputs of the individual receivers comprising...
2016
Abstract: Advantages and Disadvantages of Array Depth Placement and Longer Toolstring Apertures; #90187 (2014)
N. Verkhovtseva and J. Shaffner
Search and Discovery.com
... event (Zimmer 2010). The velocity model plays a major role in the apparent event apertures and therefore should be carefully considered when deciding...
2014
Field Technique Design for Seismic Reflection Exploration
L. R. Denham
Dallas Geological Society
... example). Such an array will attenuate all arrivals with a wavelength of 40 m. The minimum apparent velocity of a reflection in the area at the target depth...
1982
Extending the Resolution of Seismic Reflection Exploration
L. R. Denham
Pacific Section of AAPG
... an East Texas example [Figure 8]). Such an array will be 6 dB down at a wavelength of about 80 m. The minimum apparent velocity of a reflection...
1980
Data Enhancement from a 486-Channel Streamer
Bill Dragoset, Ken Larner
Pacific Section of AAPG
... frequency components. The amount of attenuation depends on the velocity distribution, array length and offset, and reflector dip and depth. Figure 5...
1980
3D installation of fiber cables for acquiring 3C DAS array data
Yingping Li, David Li, Lianjie Huang, Yingcai Zheng
International Meeting for Applied Geoscience and Energy (IMAGE)
...). For a given sensor spacing (also gauge length) of 8 m, there are 4335 fiber “sensors” in this 3C DAS CCC fiber array. Introduction Distributed...
2023
Horizontal Wave Testing, by Bob Hardage, #40502 (2010).
Search and Discovery.com
2010
Abstract: Microseismic Event Location Accuracy Enhancement using Anisotropic Velocity Models; #90172 (2014)
Michael Jones, Richard Parker, Shawn Maxwell
Search and Discovery.com
... value of 0.12 was selected for the parameter γ, governing the shear anisotropy. Given a velocity model and a survey geometry, it is possible...
2014
Characterization of near-surface fractures for hydrogeological studies using azimuthal resistivity survey: A case history from the Mamu Formation, Enugu (Nigeria)
Ahamefula U. Utom, Benard I. Odoh, Daniel K. Amogu, Amobi C. Ekwe, Boniface C. E. Egboka
Environmental Geosciences (DEG)
... of anisotropy (Keller and Frischknecht, 1966; Habberjam, 1972), whereas the direction of maximum apparent resistivity measured by the collinear array...
2013
Seismic Array Response in the Presence of Intra-Array Variations in Element Weights, Elevations, and Positions; #42328 (2018)
Ryan Adhi Putra, Abdullatif A. Al-Shuhail
Search and Discovery.com
... indicates the delta (spike) function centered at t=0. The mathematical representation of the Ricker wavelet is given as: (2) Moreover, the array wavelet...
2018
Geological Considerations during Microseismic Monitoring, Processing, and Interpretation of Hydraulic Fracture Treatment
J. Le Calvez, S. Hanson-Hedgecock, P. Primiero, T. Al-Wadhahi, O. Harrasi
Unconventional Resources Technology Conference (URTEC)
..., are the quality of the velocity model used, understanding the survey design biases and the seismic data quality. High levels of noise, array geometry...
2016
The Effect of Velocity Uncertainty and Attenuation on Flow Estimates From Microseismicity
Oleg V. Poliannikov, Michael Fehler, Alison Malcolm
Unconventional Resources Technology Conference (URTEC)
... induced rock failure and seismic wave propagation, e.g., rock cohesion, rock friction, maximum and minimum stresses in the formation, velocity model...
2015
Seismic Imaging through Outcropping Carbonates: An Example from the Canadian Rocky Mountains, , #41533 (2015).
Yong Hua, Don C. Lawton
Search and Discovery.com
... (2015) Posted February 9, 2015 *Adapted from extended abstract prepared in conjunction with a presentation given at CSPG/CSEG 2007 GeoConvention, Calgary...
2015
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
Abstract: Optimum Aperture Length for Improving Dispersion Curve Analysis in CMP Cross-Correlation of Surface Waves; #90187 (2014)
Roohollah Askari, Robert J. Ferguson, and Helen Isaac
Search and Discovery.com
... is approximately equivalent to the maximum length of the observed wavelength and calculate the dispersion curve. Figure 3 shows the phase velocity. Here, we see two...
2014
Reservoir Description by Interferometric Imaging of VSP Data in Transition Zones
Thomas Radford, Martin Karrenbach, Ferry Yustiana, Willi Brianno, Dhea Wachju
Indonesian Petroleum Association
... of the curves is readily apparent, showing an initial velocity drop followed by a general increase in velocity. However, the variability at each...
2013
The Application of Velocities and Models to Seismic Interpretation
G. Jarrota
Indonesian Petroleum Association
... maximum generally indicates the seismic velocity for the corresponding time. The peak values of these amplitude curves are displayed on the right...
1977
A Comparative Study of Conventional Arrays of Resistivity Prospecting with Differential Arrays
K. K. Sharma, S. Jayashree
Geological Society of Malaysia (GSM)
... over a conducting substratum (Fig. 2). For the first case (Fig. 1) the apparent resistivity curve obtained with a dipole array differs from those...
1996
A Case for Microseismic Surface Arrays in Texas?
Hallie Meighan, Robert A. Hull, Earl Roberts
Unconventional Resources Technology Conference (URTEC)
..., the patch- and nearby downhole-array recorded the same hydraulic stimulation and their microseismic datasets confirmed the same maximum stress azimuth...
2015
Geophysical investigation of mine waste in the King River Delta, Macquarie Harbour, Tasmania
Matthew J. Cracknell, Sibele C. Nascimento, Wei Xuen Heng, Anita Parbhakar-Fox, Thomas A. Schaap
Petroleum Exploration Society of Australia (PESA)
.... Nine shots, stacked three times, were collected for a given array at 0, 7, 13, 19, 25, 31, 37, 43 and 50 m. Geophone arrays were moved 32 m during...
2019
First-Arrival Traveltime Inversion in the CMP Domain: Method and Application
Search and Discovery.com
..., and Zhu et al., 2000) which derives the near-surface velocity model based on traveltime reconstruction. The other approach is to map apparent velocities...
2013
AAPG Memoir 76, Chapter 18: Velocity Estimation for Pore-Pressure Prediction
David W. Bell
AAPG Special Volumes
... tectonic uplift and therefore exhibit a higher velocity for a given depth than expected from the compaction trend evident above the unconformity...
2001
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
Abstract: Seismic Wave Attenuation due to Scattering and Leaky Mode Mechanisms in Heterogeneous Reservoirs; #90171 (2013)
Jun-Wei Huang, Gilles Bellefleur, and Bernd Milkereit
Search and Discovery.com
... is controlled by the correlation length of the reservoir. We thus predict that the effects of leaky modes to the energy loss increase to the maximum...
2013