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The AAPG/Datapages Combined Publications Database
Showing 10,781 Results. Searched 195,364 documents.
High Resolution “Vibroseis” Data – Compressional and Shear-Wave Modes
D. E. Miller, D. E. Dunster
Pacific Section of AAPG
... Composite) and Surface Elevation Figure 6. North-South P Wave Reflection Line (4/1 Composite) Corrected for Elevation and Weathering Figure 7. North...
1972
Seismic Data-Processing Techniques in Exploration for Reefs, Northern Michigan
P. L. McClintock
AAPG Special Volumes
...------------------------ the signal-to-noise ratio of the final section. Additionally, corrections for variations of elevation were computed and applied to the data...
1977
ABSTRACT: Seismic Exploration Pitfalls in Northeastern United States, by James R. Morris; #91023 (1989)
Search and Discovery.com
1989
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)
.... In shallow refraction work, some of the common difficulties encountered in the interpretation are due to the near-surface inhomogeneities' and variations...
1982
Corrected Record Sections
Ernest M. Hall Jr.
CSPG Special Publications
... moveout. The weathering and elevation or “static” corrections are constant for a given trace throughout the length of the record. The normal moveout...
1957
Gravity Survey of the Northern Channel Islands
J. D. Rietman, J. K. Aldrich
Pacific Section of AAPG
... based on measured values, estimated lithologic variations, near-surface weathering effects, and the effects of compaction. Except for the volcanics...
1969
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
... using different near surface weathering static calculations and different velocity model building strategies are compared. In the first processing, we...
2015
Building a three-dimensional near-surface geologic and petrophysical model based on borehole data: A case study from Chemery, Paris Basin, France
Paola Sala, Marcel Frehner, Nicola Tisato, O. Adrian Pfiffner
AAPG Bulletin
...Building a three-dimensional near-surface geologic and petrophysical model based on borehole data: A case study from Chemery, Paris Basin, France...
2013
A Novel Method of Deriving Weathering Statics from First Arrival Refractions
G. W. Hollingshead, R. R. Slater
Pacific Section of AAPG
... reflection shot records, together with an integrated technique for their reduction to surface consistent weathering statics. The method is an adaptation...
1980
Jasper Area Alberta, a Source of the Foothills Erratics Train1
E. W. Mountjoy
CSPG Bulletin
... not be transported on or near the surface of a glacier (see Stalker. 1956. p. 15), and will not be considered further. Above the Jasper Series and Hector...
1958
Subsurface Geology of the Kuala Lumpur Limestone
Lim Tow Ho
Geological Society of Malaysia (GSM)
..., Penang. Subsurface geology The subsurface geology of the Kuala Lumpur ,Limestone means geology near the surface. The geological information was extracted...
1989
How to Make Velocity Corrections
John W. Daly
AAPG Bulletin
... to travel from a near-by surface point to the geophone has proved to be the best way of determining velocities. It has become very popular since cooperative...
1944
Some Thoughts on the Crustal Structure of Peninsular MalaysiaResults of a Gravity Traverse
Patrick J. C. Ryall
Geological Society of Malaysia (GSM)
... metamorphosed Palaeozoic rocks on each flank. The maximum may be caused by either near-surface dense igneous rocks associated with the Kampong Awah andesitic...
1982
Diagenesis and Weathering: DISCUSSION
Eliot Blackwelder
AAPG Bulletin
... at and near the surface of the lands. Krumbein remarks that "The subject of weathering is a science in its own right." Why then suggest that it should...
1947
Zama--A Geophysical Case History: Case Histories
Hugh Evans
AAPG Special Volumes
... dictated that a 4,000-ft (1,220 m) spread would give sufficient NMO differential to attenuate adequately the near-surface multiple reflections emanating...
1972
The Role of Seismic in Play Type and Prospect Development: Eastern Canning Basin
Ted Jacobson
Petroleum Exploration Society of Australia (PESA)
... to noise ratio and a greater dif• ficulty in picking good static corrections. A high near-surface ground water table not only im• proves the signal...
1984
Seismic Velocity Model Building in an Area of Complex Geology, Southern Alberta, Canada
Helen Isaac and Don Lawton
Search and Discovery.com
... an estimate of the sub-weathering velocities and can also be used to make a detailed near-surface velocity model if desired. 16 Constant velocity...
2009
Petroleum Geologist and Exploration Geophysicist: Co-Ordination and Seismic Velocity
John D. Hale
CSPG Bulletin
...." After computation of the basic data of measured times by the use of a rapid system of computing, including near-surface "weathering" or low velocity...
1956
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
Abstract: Performance of Seismic Arrays in the Presence of Weathering Layer Variations; #90254 (2016)
Jubran Akram, Abdullatif A. Al-Shuhail
Search and Discovery.com
... Solutions King Fahd University of Petroleum and Minerals Abstract Near-surface layer variations can degrade the desired response of seismic arrays...
2016
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...
2014
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...
1953
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...
2016
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...
1952