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The AAPG/Datapages Combined Publications Database

Showing 7,369 Results. Searched 189,126 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

Search and Discovery.com

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

2015

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...

2011

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

Tianfei Zhu, Yan Yan, and Jon Downton

Search and Discovery.com

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

2015

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

Yong Hua, Don C. Lawton

Search and Discovery.com

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

2015

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...

1932

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

Search and Discovery.com

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

2013

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...

2008

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...

2006

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...

2018

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

Search and Discovery.com

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

2015

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

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

Search and Discovery.com

... 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...

2015

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...

2016

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

Abdulaziz m. Alsaad

Search and Discovery.com

... 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...

2016

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...

1982

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

Ernesto Sandoval-Curiel, Daniele Colombo

Search and Discovery.com

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

2018

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...

1951

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...

1983

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...

1991

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...

2012

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

Tariq Alkhalifah, Claudio Bagaini

Search and Discovery.com

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

Unknown

Where Is My Horizontal Well? Use of Borehole Seismic Where Velocities Vary Laterally

Agus Muharam, Frank Musgrove

Indonesian Petroleum Association

... are less accurate but still more accurate than no information (± 60 feet), due to more variable near surface statics, datuming velocities...

1998

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