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The AAPG/Datapages Combined Publications Database
Showing 17,690 Results. Searched 200,293 documents.
The Effect of Velocity Uncertainty and Attenuation on Flow Estimates From Microseismicity
Oleg V. Poliannikov, Michael Fehler, Alison Malcolm
Unconventional Resources Technology Conference (URTEC)
... modeled noisy travel times. The errors in the estimated travel times are primarily due to a combination of an uncertain velocity model and attenuation. Our...
2015
Ultra-Long Offsets Signal a Bright Future for OBN
Duncan Bate, Mike Perz, TGS
GEO ExPro Magazine
... to resolve large velocity errors and provide significant imaging uplift. Crucially, the inversion-based algorithm can reduce Image shows the velocity...
2021
Chart Migrations
Frank A. Roberts
Oklahoma City Geological Society
... parameters of space. We are immediately concerned with the velocity function. Should we use an average overall velocity, a linear or an expotential...
1958
High-End Model Building Techniques for Revealing a Pre-Carbonate Reservoir Offshore East Natuna Basin, Indonesia
Jun Wang, Yonghe Guo, Yitao Chen, Muhammad Nauvall Juliansyah, Nick Crabtree
Indonesian Petroleum Association
... was applied to update the complex carbonate platform. However, given the depth of the pre-carbonate, there were still residual velocity errors due to poor...
2023
Velocity continuation with Fourier neural operators for accelerated uncertainty quantification
Ali Siahkoohi, Mathias Louboutin, Felix J. Herrmann
International Meeting for Applied Geoscience and Energy (IMAGE)
... We introduce a deep-network surrogate for velocity continuation in order to enable faster quantification of uncertainty—due to errors...
2022
Critical Analysis of Stack Seismic Systems: DISCUSSION
Richard H. Hopkins
AAPG Bulletin
...--to the point where its effect is less than other random errors in the statics, velocity, detector plants, etc. I believe the crux of the matter...
1967
Abstract: Modeling the Near-Surface Using High-Resolution Seismic Data, by Ramzy M. AlZayer and Tariq Alkhalifa; #90077 (2008)
Search and Discovery.com
2008
Abstract: Target-Oriented Imaging for Continous Seismic Reservoir Monitoring; #90319 (2018)
Hongwei Liu, Mustafa Al-Ali
Search and Discovery.com
... data recorded using surface receivers generally fails to explain how energy propagates in the complex subsurface unless highresolution seismic velocity...
2018
Reflection Tomography for Validation of Subtle Structures: A Case History from Southern Tunisia
Search and Discovery.com
N/A
Abstract: Confidence and Accuracy of Microseismic Images; #90171 (2013)
S.C. Maxwell
Search and Discovery.com
... time errors/residuals through an array. velocity model inaccuracies, although QC of the velocity model also generally involves independently ensuring...
2013
Abstract: High-Accuracy Relative Event Locations using a Combined Multiplet Analysis and the Double-Difference Inversion; #90174 (2014)
Fernando Castellanos and Mirko van der Baan
Search and Discovery.com
... method that seeks to reduce the effects of errors due to unanticipated velocity heterogeneities in the structure (Waldhauser and Ellsworth, 2000...
2014
Abstract: Resolution and Location Uncertainties in Surface Microseismic Monitoring; #90174 (2014)
Michael Thornton
Search and Discovery.com
... imaging with only compressional waves, significantly reducing the sensitivity to velocity model assumptions. While the surface arrays offer several...
2014
Improving Marcellus Imaging Through the Use of FWI and Joint Tomographic Inversion for Velocity and Epsilon
David McCann
Unconventional Resources Technology Conference (URTEC)
... CIG, the true velocity and epsilon values are unknown. The portion of the green curve in the near offsets, to the left, are dominated by errors...
2018
Improved Structural Imaging of the Karama Seismic Survey Using Anisotropy Kirchhoff and Beam Depth Migration
Zbigniew Ostapiuk, Bee Jik Lim, Martin Bayly
Indonesian Petroleum Association
... geological environments such as layered, fold–thrust, anticlinal and faulted structures often show strong lateral velocity heterogeneity and seismic...
2012
Rapid Multiple-Scenario Depth Structure Risk Analysis Case Study in Cuulong Basin, Vietnam
Nguyen Nam, Hong Shien Lee
Indonesian Petroleum Association
... of smoothing of the seismic velocities (may affect shallow gas anomalies but also reduces noise errors in the velocity field). • Use of well picks...
2008
Abstract: Post-processing Technique to Relocate Microseismic Events Using the Double-Difference Method; #90187 (2014)
Fernando Castellanos and Mirko van der Baan
Search and Discovery.com
... monitoring, is mainly affected by several factors: a limited sourcereceiver configuration, errors in time picks and in the velocity model used, which...
2014
Where Is My Horizontal Well? Use of Borehole Seismic Where Velocities Vary Laterally
Agus Muharam, Frank Musgrove
Indonesian Petroleum Association
... at the other end of the borehole would minimize these possible errors. Our opinion is that the magnitudes of the velocity and depth changes...
1998
Geological Factors Influencing Porosity Estimates From Velocity Logs
Roberto Sarmiento
AAPG Bulletin
... by computing standard errors of porosity estimate. Standard error is the error to be expected in estimating porosity from velocity logs by using...
1961
Abstract: Q-estimation from Uncorrelated Vibroseis VSP Model Data; #90172 (2014)
Arnim B. Haase
Search and Discovery.com
..., University of Calgary [email protected] Summary A known method for velocity dispersion estimation and Q-factor calculation from uncorrelated...
2014
Abstract: How to Improve Location Accuracy When Dealing with Artifacts in Microseismic Event Locations; #90187 (2014)
N. Verkhovtseva
Search and Discovery.com
... velocity models construction and calibration are required. In most cases artifacts can be eliminated by using a proper velocity model. Introduction...
2014
Wide-Angle Seismic-Reflection and -Refraction Data from the Solomon Islands
A. K. Cooper, R. A. Wood
Circum Pacific Council Publications
...%. SOURCES OF ERROR The sonobuoy velocity determinations for both wide-angle reflection and refraction data are affected by errors from three sources: field...
1986
A Regional Velocity Cube for Depth Conversion on the Northwest Shelf
Maighréad Ní Dheasúna, Mark Ballesteros, James Leven
Petroleum Exploration Society of Australia (PESA)
...-hyperbo lic stacking velocities against the check shot data on velocity errors, and maintains the q uality of the anomalies need to be removed, either...
2012
A case study using FWI to image pre-Messinian target in the East Mediterranean Sea
Jyoti Kumar, Marcus Bell, Tamer Darwish, Mai Ahmed, Mahmoud Ahmed, Moataz Ahmed
International Meeting for Applied Geoscience and Energy (IMAGE)
.../s was used in this instance. A further spatially varying salt velocity was obtained by picking the errors at the base salt moveout on gathers. On the other...
2022
Lateral Changes in Seismic Velocities and Their Effect on Depth Prediction
J. Pinchin, M. Bayly
Petroleum Exploration Society of Australia (PESA)
... many seismic velocity analyses on a tight grid of lines, statistical errors in these velocity measurements can be reduced. An analysis of stacking...
1989
Application of Seismography to Geological Problems
Eugene McDermott
AAPG Bulletin
.... Use of erroneous average velocity in calculations II. Errors in the determination of the travel time of reflected or direct impulses III...
1931