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Showing 34,457 Results. Searched 200,357 documents.
AVA on communication cables: Principles and Examples from the North Sea
Ran Bachrach, Ali Sayed, Andrea Murineddu, Pilar Di Martino
International Meeting for Applied Geoscience and Energy (IMAGE)
... specific corrections to compensate for the gauge length (GL) effect and convert the DAS recording to particle velocity (Bachrach et al., 2023). After...
2024
Lithology characterisation of the roof and floor of the Moranbah measures coal seam using post-stack and pre-stack seismic inversion
Margarita Pavlova
Petroleum Exploration Society of Australia (PESA)
... energy and NMO stretch on the far offsets. Consequently, the usable angle range for inversion was chosen to be 10-32 degrees. Data conditioning techniques...
2019
Geological Cross Sections: Part 6. Geological Methods
Jeremy M. Boak
AAPG Special Volumes
... have looked like at some time in the past. By "hanging" all the available vertical information on a stratigraphic horizon or datum that can...
1992
Abstract: AVAZ and VVAZ Practical Analysis to Estimate Anisotropic Properties; #90224 (2015)
Yexin Liu
Search and Discovery.com
... and VTI anisotropy. One method is seismic travel-time variations or velocity variations with azimuth (VVAZ) from seismic offset-gathers and another...
2015
Inferring Stratigraphy from Seismic Data
R. E. Sheriff
AAPG Bulletin
.... Dohr, G. P., and P. K. Stiller, 1975, Migration velocity determination. Pt. 2, Applications: Geophysics, v. 40, p. 6-16. Domenico, S. N., 1974, Effect...
1976
Cost Effective Seismic Acquisition in the Papuan Foreland Basin
A. Garcia, J. D. Schneider, F. E. Doughty
Papua New Guinea (PNG) Petroleum Convention Proceedings
... ms Datum statics, sea level Deconvolution Shot, receiver F-K filters Time variant bandpass CDP gather Velocity analysis every 2 km Velocity analysis...
1993
2.2 Basement Involved: 2.2.2 Rifts: A Half-Graben and Tilted Fault Block Structure in the Northern North Sea
A. C. Evans and D. N. Parkinson
AAPG Special Volumes
... corrected to sea level + 0.02S Deconvolution: Predictive Migration: 401-fold. 100% NMO velocities Time and space variant bandpass filter within...
1983
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
.... However, the conclusions of our study remain the same. Partial Prestack Migration The data were corrected for NMO using a stacking velocity model...
1991
Lateral Correlation and Interpolation of Logs: Chapter 6
John H. Doveton
AAPG Special Volumes
... tends to accentuate shale units. The use of acoustic velocity (the reciprocal of transit time) would tend to suppress shale features and accentuate low...
1994
Lithology Prediction by Extrapolating Well Data
Brian Barley, Dean Chergotis, Mai Wilson, Susan Young
Indonesian Petroleum Association
... of some alternative methods follows. Lindseth (1979) used interval velocities derived from stacking velocities and an assumed velocity-density...
1992
Premigration attenuation analysis and mapping to image domain by weighted migrations
Yonghe Sun, Chunling Wu, Mark Fan, Zhemin Tan
International Meeting for Applied Geoscience and Energy (IMAGE)
... 𝑆(𝑓), 𝑡 ∗ picks are not exactly zero. Figure 5c shows the smoothed version of 𝑡 ∗ as input to Attenuated time 𝑡 ∗ picked using premigration data can be used...
2022
Integration of Depth Conversion, Seismic Inversoin and Modeling Over The Belida Field, South Natuna Sea Block "B", Indonesia
Patrick Jonklaas
Indonesian Petroleum Association
... such a broad structure and the presence of velocity variations, depth conversion of the reservoir horizons seismic time maps is a key component of accurate...
1991
Seismic Velocity Model Building in an Area of Complex Geology, Southern Alberta, Canada
Helen Isaac and Don Lawton
Search and Discovery.com
... created through iterative updates of the velocity models. Our choice of velocities for the depth migrations is guided by constant velocity migrated...
2009
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
A Simple Guide to Volumetrics
Ashley Francis
GEO ExPro Magazine
... and residual mapping. Uncertainty is present at all steps including the time interpretation, gridding, estimation of the velocity field and the choice...
2015
Abstract: A Case History of Velocity Problems in the Shadow of a Large Growth Fault in the Frio Formation, Texas Gulf Coast
James L. Allen and J. M. Bruso, Jr.
Houston Geological Society Bulletin
... and then the other velocity survey was valid over the entire area for conversion of well data to time produced a drastic difference in the structural...
1989
Seismic Signature as a Porosity Indicator in Early Miocene Reefs in the Madura Strait Via AVO Inversion and Modelling
Bimal R. Banerjee
Indonesian Petroleum Association
... (P-wave) does not suffer from non linear NMO stretch effects. Diagram 1. Correlating normal incidence trace from the AVO inversion of the Surface...
1993
Eye-Openers from Re-Processing of Oil Sands Seismic Data; #41290 (2014)
David Gray, Seann Day, and Scott Shapper
Search and Discovery.com
... introduce significant time distortions that are not adequately corrected with typical NMO velocities. Gathers should be examined for evidence of anisotropy...
2014
Seismic Modeling and Expression of Common Fold-Thrust Belt Structures; #42266 (2018)
Jianjun Li, Shankar Mitra
Search and Discovery.com
...-similar fault-propagation fold cannot be imaged properly. ● The pull up effect caused by the lateral velocity cannot be solved by pre-stack time...
2018
3D-9C seismic survey for direct S-wave processing and interpretation
Rui Zhang, Zhiwen Deng, Yuanyuan Yue, Yan Wang
International Meeting for Applied Geoscience and Energy (IMAGE)
... data than any converted P-S data. Most Pwave seismic data processing techniques were used here, such as NMO and velocity analysis, etc., which...
2022
Towards Quantitative Assessment of 4D DAS Time Shifts for Enhanced Stimulated Rock Volume Characterization
Yesser Haj Nasser
Unconventional Resources Technology Conference (URTEC)
... of this 4D signature, we implement a pragmatic 4D modeling workflow with geomechanical fracture characterization. The stacking of all the 4D DAS time...
2022
Seismic Sequences and Their Distribution on the Wilkes Land Margin
S. L. Eittreim, G. L. Smith
Circum Pacific Council Publications
... 17 TRACE SHOT 3. S T A T I C CORRECTIONS: RECORDING S T A T I C S : DATUM: 4. COP SORT: 5. VELOCITY A N A L Y S I S : WINDOW LENGTH: WINDOW I N...
1987
The Preparation of Seismic Depth Maps in Oil Exploration
A. E. Pallister
CSPG Bulletin
... of these three velocity zones on the deeper seismic reflections, reflection-time maps with reference to a + 3,000-foot seismic datum were prepared, using...
1960
Stratigraphic Velocity Interpretation: National Petroleum Reserve--Alaska: Chapter 12
E. W. Peikert
AAPG Special Volumes
... time versus offset relationships along coherent events within these velocity gathers are analyzed to determine normal moveout (Vnmo) or stacking...
1985
Acquisition, Processing, and Analysis of Shallow, High-Resolution Seismic Data from the Outer Continental Shelf and Upper Slope, Offshore Louisiana
Susan E. Nissen , Janet M. Combes , Anthony G. Nekut
Journal of Sedimentary Research (SEPM)
... arrivals on this shot record allowed the recording delay time, source and receiver depths, water depth, and water velocity to be estimated. TABLE 1. Seismic...
1999