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...

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...

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...

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...

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...

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...

Refraction Profiles Over the Southern Rocky Mountain Trench Area of British Columbia

A. T. Lamb, D. W. Smith

CSPG Bulletin

... inline refraction profiles and seven cross spreads oriented parallel to the Trench. Excluding a small amount of near surface weathering material...

Pollen Field, Colorado: Evidence for Vertical Hydrocarbon Migration and Geochemistry Economic Utility, by P. K. H. Groth; #90986 (1994).

Search and Discovery.com

Porosity Prediction in Sandstones Using Erosional Unconformities

G. Shanmugam

AAPG Special Volumes

... weathering of near-surface rock strata. Subaerial erosion exposes new surfaces for leaching, commonly over wide areas. During subsequent weathering...

Systematic Approach in the Characterisation of Granitic Weathering Profiles in Tropical Terrains

Ibrahim Komoo, Kadderi Md Desa, Hamzah Mohamad, Abdul Ghani Rafek, Tan Boon Kong

Geological Society of Malaysia (GSM)

.... Although the degree of rock mass weathering changes with depth, the general trend that the rocks are completely weathered near the surface and become less...

Basalt Weathering and Fluvial Sedimentary Particles: Comparison of Two Watersheds in the Middle Atlas Mountains, Morocco

J. J. Macaire , C. Cocirta , L. Karrat , A. Perruchot

Journal of Sedimentary Research (SEPM)

..., N., 1990, Weathering of basalts in North Parana basin (Brazil), chemical aspects, in Nahon, D, ed., Geochemistry of the Earth's Surface...

Seismic Studies in the Church Rock Uranium District, Southwest San Juan Basin, New Mexico

William T. Phelps, Robert S. Zech, A. Curtis Huffman Jr.

AAPG Special Volumes

... to compensate for elevation and near-surface velocity variations along each seismic line. Because neither refraction surveys nor uphole time from shot...

Geophysical Evidence for Thin-Skinned Structural Deformation in the Norman Range, Northwest Territories

DON C. Lawton, J. Helen Isaac

CSPG Bulletin

..., except for the Bear Rock Formation, for which the measured values are significantly lower. This is due to the near-surface dissolution of the anhydrite...

Abstract: 3C Deghosting for Refraction Time-lapse Monitoring; #90187 (2014)

P. B. Wills and K. De Meersman

Search and Discovery.com

... ghosting with strong near-surface effects. For refraction data, which is lower fold, ghost removal can be even more important than for conventional...

Geophysics Along the Edwards Trend

W. Lee Moore

GCAGS Transactions

... crews to convert to this method. Seismic energy is recorded on tape and then played back through filtered channels. Weathering and elevation corrections...