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The AAPG/Datapages Combined Publications Database

Showing 7,478 Results. Searched 190,755 documents.

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Abstract: Seismic Imaging of Imbricate Structures in Mountainous Area: Case Studies; #90211 (2015)

Nanxun Dai, Oz Yilmaz, Weizhong Wang, and Jie Zhang

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... trajectories to form a general trend that can be associated with laterally invariant but vertically varying velocities within the near surface. We...


Time Depth Conversion of a Prospect With Near-Surface Velocity Anomalies Using Stacking Velocites and PSDM Velocities: A Comparison

Tan Boon Hua, Lothar Schulte

Indonesian Petroleum Association

...Time Depth Conversion of a Prospect With Near-Surface Velocity Anomalies Using Stacking Velocites and PSDM Velocities: A Comparison Tan Boon Hua...


Abstracts: Near-surface Velocity Model Building and Statics in Permafrost Regions; #90173 (2015)

Tianfei Zhu, Yan Yan, and Jon Downton

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... land and water velocities. To carry out the reflection tomography, we placed this layer atop a smoothly varying velocity model and used...


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)

... relatively more variability in physical properties than the other modelled layers. At ~2-5 m below the surface, a laterally continuous layer is observed...


Seismic Imaging through Outcropping Carbonates: An Example from the Canadian Rocky Mountains, , #41533 (2015).

Yong Hua, Don C. Lawton

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... effective in compensating for the effects of the laterally variable near-surface layer. 2. Spatially varying noise reduction processes were effective...


Seismic Weathered or Aerated Surface Layer

O. C. Lester, Jr.

AAPG Bulletin

... present in larger and larger proportions near the surface. The few profiles in which velocities lower than that of sound in air had been indicated, were...


Abstract: Point Receiver Acquisition and Processing for Arctic Near Surface Challenges; #90171 (2013)

C. Strobbia, A.Glushchenko, A. Laake, P.L.Vermeer, S. Papworth, and Y. Ji

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... of the moraine, causing strongly laterally varying near surface Figure 1: Location of source and receiver line on a satellite image conditions. AAPG...


Imaging Complex Structures in Colombia … Full Wave Equation Migration Approach

Hector A. Alfonso, Luis E. Rojas, Weizhong Wang, Jie Zhang, Oz Yilmaz

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... with a layer-by-layer approach for the subsurface area below the near-surface model. Similar to the RMS velocity field derivation, this is an image-based...


What Are You Interpreting? Your Seismic Image Could Be Misleading You!

R. T. Newrick, E. P. Gomez, J. K. Pullishy, S. D. Jensen, J. M. de Armas

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... velocities estimated from well logs. The initial depth migration improved reflectivity in the near surface so an additional layer was added to the model...


Modelling complex near-surface features to improve shallow seismic exploration.

Shaun Strong

Petroleum Exploration Society of Australia (PESA)

... Land seismic exploration is often limited or impacted by complex structures in the near surface. These can include large variations in velocities...


Abstract: To TTI or not to TTI? Semi-Automated 3D Tomographic Velocity Analysis in the Canadian Foothills: A Case History; #90211 (2015)

Sylvestre Charles, David Mitchell, Rob Holt, Jiwu Lin, and John Mathewson

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... considered unreliable, and so are often not included in the calculation of near-surface velocities. For this project, carefully edited uphole times were...


A Southern North Sea Multi-Survey preSDM using Hybrid Gridded Tomography, #41592 (2015).

Ian Jones, Emma Evans, Darren Judd, Alan Campbell, Steve Elam

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... would be used if the layer being picked was very uncertain, as is often the case for an ill-defined near-surface channel or the seismically transparent...


Application of Interferometric MASW to a 3D-3C Seismic Survey

Shaun Strong, Steve Hearn

Petroleum Exploration Society of Australia (PESA)

... image will be degraded due to lateral near-surface variations. We present a methodology which incorporates interferometry into the MASW method (IMASW...


Abstract: Tying Different Near Surface Models Using Geostatistics; #90254 (2016)

Abdulaziz m. Alsaad

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... the near surface anomaly. The multiple layer model produces a long wave length solution. A 3D tomogram focuses the data at the anomaly but does not produce...


Some Applications and Problems of the Seismic Refraction Technique in Civil Engineering Projects in Malaysia

B. K. Lim, S. J. Jones

Geological Society of Malaysia (GSM)

... layers have increasing seismic velocities. (d) The thickness of each refracting layer is small compared to the length of the refraction spread...


Abstract: Near Surface and Anisotropy Modeling Strategies for Fast-Track Land Depth Imaging; #90319 (2018)

Ernesto Sandoval-Curiel, Daniele Colombo

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... near-surface modelling by generating velocities in depth, together with long-, medium- and short-wavelength static corrections, reflection velocity...


Velocity as a Problem in Mississippi

R. R. Phillips

GCAGS Transactions

... in Mississippi, and there is a definite need for closer velocity control. Cross sections showing effects of highly variable near surface velocities...


High Performance Seismic Data Migration for High Resolution Interpretation

C. N. Chernoff

Indonesian Petroleum Association

...-processing where the near surface effects of the weathered layer and the low velocity layer are removed by analytically and vertically reducing the sources...


Integration of Depth Conversion, Seismic Inversoin and Modeling Over The Belida Field, South Natuna Sea Block "B", Indonesia

Patrick Jonklaas

Indonesian Petroleum Association

... an indication of how the velocities are varying laterally and can then be contoured. In an ideal situation where more well control exists the personal bias...


ABSTRACT: Practical Applications of the Ground-roll Inversion

Soumya Roy

Houston Geological Society Bulletin

...ABSTRACT: Practical Applications of the Ground-roll Inversion Soumya Roy 2012 23 23 54 06 Estimation of the near-surface shear-wave velocity...


ABSTRACT: Fast and Easy Near Surface Correction of an Arabian Peninsula Seismic Line Using the Topographic Datuming Operator; #90051 (2006)

Tariq Alkhalifah, Claudio Bagaini

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...ABSTRACT: Fast and Easy Near Surface Correction of an Arabian Peninsula Seismic Line Using the Topographic Datuming Operator; #90051 (2006) Tariq...


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