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...

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

... corrections is about 20ms which is very good for first 20m of the near surface. The reason that we are not able to image deeper layers in this study...

Abstract: A Reconstruction of Global Sediment Fluxes Since the Late Jurassic: Fact, Fiction or Wishful Thinking?, by Paul Markwick, Daniel Campanile, Amanda Galsworthy, Lauren Raynham, Melise Harland, Kate Benny, Rob Bailiff, Kathelijne Bonne, Laura Hagan, Dorothea Eue, and Neil Wrobel; #90124 (2011)

Search and Discovery.com

Recovering Subsurface Coverage in the Emerging Smackover Brown Dense Unconventional Play in Northern Louisiana, #80515 (2016).

Richard Verm

Search and Discovery.com

...  Surface  Model   Cross-­‐Sec8ons   Near Surface Before refraction static corrections Near Surface After refraction static corrections...

Limitations of Reflection Seismograph

L. E. Nugent, Jr.

AAPG Bulletin

... of computational procedures. This is not a weathered zone in the geologic sense but rather a near-surface zone in which velocities are 1/5...

EXPLORATION PROBLEMS OF THE WILLISTON BASIN*

K. E. BURG

Montana Geological Society

... reflection work in the Williston Basin. Probably the most serious is the variation of the vertical velocity in the near-surface formations...

Study on reservoir development characteristics and its hydrocarbon accumulation models of crystalline bedrock weathering crust in the Dongying Sag, Bohai Bay Basin, northeast China

Maolin Zhu, Zhen Liu

International Meeting for Applied Geoscience and Energy (IMAGE)

... in crystalline bedrock are closely related to the elevation and evolution degree. At higher elevation, weathering is more intense, structural damage...

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

... by dividing the elements’ spacing (Δx) by a constant near-surface velocity (v=500 m/s). The elements’ spacing (Δx) varied from 0 to 5,000 m. It had a 1-m...

Geochemical Variations in an Alpine Lake and Watershed Underlain by Siliciclastic Bedrock, Uinta Mountains, Utah

John W. Christensen Jr., Paul W. Jewell

Utah Geological Association

... the watershed. Cations and silica show similar although less dramatic changes with respect to elevation. Silicate weathering seems to constitute...

Abstract: Converted Wave Receiver Statics from First Break Mode Conversions; #90171 (2013)

Kristof De Meersman and Marcelo Roizman

Search and Discovery.com

... of receiver functions with near surface P-wave velocity information obtained from conventional P-wave refraction statics allows us to derive a S-wave...

Abstract: Converted Wave Receiver Statics from First Break Mode Conversions; #90171 (2013)

Kristof De Meersman and Marcelo Roizman

Search and Discovery.com

... of receiver functions with near surface P-wave velocity information obtained from conventional P-wave refraction statics allows us to derive a S-wave...

Integration of active and passive surface seismic for understanding the variations observed during a stimulation campaign.

Paolo Primiero, Gorka Garcia Leiceaga, Joël Le Calvez

Unconventional Resources Technology Conference (URTEC)

... in the processing despite environmental noise, near surface complexity in some areas and attenuation by the weathering layers might compromise...

Extending the Resolution of Seismic Reflection Exploration

L. R. Denham

Pacific Section of AAPG

... in reflection time due to the approximations in the theory of normal move-out corrections. Figure 2. A long near trace offset affects reflections...

Weathering Features of a Granitic Outcrop at Sungai Batu, Penang

Lim Tow Ho

Geological Society of Malaysia (GSM)

... to dislodge a small section of the rock mass and it being the near surface section. CONCLUSION The exposed granite at Sg. Batu, Penang is a moderately...

Seismic imaging of the Turtle Mountain structure, southwestern Alberta, Canada

J.H. Isaac, D.C. Lawton, C.W. Langenberg

CSPG Bulletin

..., Alberta. Research Council of Alberta, Report 59. Gray, S.H. and Marfurt, K.J. 1995. Migration from topography: improving the near-surface image...

Abstract: Geophysical Characterisation of the Elk Reservoir, Gulf Province, Papua New Guinea

J. Storey, S. Sioni, M. Kiele

Petroleum Exploration Society of Australia (PESA)

... in this area. The refraction velocity model put forward here identifies the near surface seismic velocity trends, improves surface static corrections...

Mineralogy and genesis of saproitte and strongly weathered soils in the Appalachian region of Canada

C. Wang, G. J. Ross, J. T. Gray, L. B. Lafrenière

Atlantic Geology

.... Elevation: 457 m AMSL). The general landform is undulating to rolling with . relatively smooth ground surface. The site is near the crest of a 10...

Diving wave tomography: Velocity modelling using first arrival traveltime

Amatul Syafi Abdul Basit, Abdul Rahim Md Arshad, Arulini Permalu

Geological Society of Malaysia (GSM)

... analysis of rock physics. In this paper, we focus on tomography and its working principle on near-surface velocity modelling. We restricted our workflow...

Critical Analysis of Stack Seismic Systems

L. E. Nugent, Jr.

AAPG Bulletin

.... These systems generally are termed "stacking" and in final presentation the multiple records have been adjusted and combined using stepout corrections...

Effects of near Surface Lithology on Velocity Modelling and Time„Depth Relationships in the Cooper„Eromanga„Lake Eyre Basin

Anna Manka, Glen Buick, Rob Menpes, Luke Gardiner, Cameron Jones, Khalid Amrouch

Australian Petroleum Production & Exploration Association (APPEA) Journal

...Effects of near Surface Lithology on Velocity Modelling and Time„Depth Relationships in the Cooper„Eromanga„Lake Eyre Basin Anna Manka, Glen Buick...

Abstract: Elastic Finite-difference Modeling for Testing Acquisition and Processing Methods; #90187 (2014)

Peter Manning, Joe Wong, and David Henley

Search and Discovery.com

... to statics corrections and migration for imaging the deeper reflectors. Figure 1: A geology model with three weathering pockets near the source point...

Groundwater Investigation Using Electrical Resistivity Imaging Technique at Sg. Udang, Melaka, Malaysia

Zeinab Asry, Abdul Rahim Samsudin, Wan Zuhairi Yaacob, Jasni Yaakub

Geological Society of Malaysia (GSM)

... and the true depth of the field resistivity image. Topographic corrections to account for variations in the surface elevation are also included...

Refraction multiple attenuation by pattern-based machine learning with a case study

Chunming Wang, Xiaohong Chen, Yongsheng Wang, Christof Stork, Sissy Theisen, Seann Day, Junru Jiao, Grace Yan, Xianhuai Zhu

International Meeting for Applied Geoscience and Energy (IMAGE)

... with significant variation. The P-wave velocity range within the near surface is from 400.0 m/s to 1500.0 m/s. The thickness of the weathering zone varies from 20.0...

Full-waveform inversion and FWI imaging for land data

James Sheng, Cristina Reta-Tang, Faqi Liu, Alfredo Vzquez Cant, Alejandro Cabrales Vargas

International Meeting for Applied Geoscience and Energy (IMAGE)

..., Pemex Summary Velocity model building and imaging for land surveys are particularly challenging due to the complexities of the near surface model...

Geophysical Anomalies Over Precambrian Rocks, Northwestern Uncompahgre Plateau, Utah and Colorado

J. E. Case

AAPG Bulletin

... susceptibility. Thus, the rock mass sampled is inadequate, probably because of the near-surface weathering of magnetite in samples collected for laboratory...