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The AAPG/Datapages Combined Publications Database
Showing 1,444 Results. Searched 200,293 documents.
Phase-Ray Maslov Summation: A Complete Finite-Frequency Ray Method
Tianfei Zhu
Search and Discovery.com
.... The phase-ray method, on the other hand, can model scattering-related wave phenomena, but ignores the contributions from neighboring non-geometric rays...
Unknown
Basic Cased Hole Tools: Part 4. Wireline Methods
Mark W. Alberty
AAPG Special Volumes
... on "Basic Tool Table" in Part 4.) Gamma Ray Tool The gamma ray measurement responds to naturally occurring gamma rays from the formation. These gamma...
1992
Abstract: Kirchhoff Prestack Time Migration with Angle Domain Common Image Gathers; #90174 (2014)
Jianhua Pan, Robert Tilson, Gerry Schlosser, and Elvis Floreani
Search and Discovery.com
..., the reflection angle is half of the opening angle which is the angle between source and receiver rays at an image point. Angle gathers collect the energy...
2014
A Study of the Morphology and Dioptrics of Some Ostracode Eyespots
Mervin Kontrovitz , John H. Myers
GCAGS Transactions
... rays through the eyespots. The paths of light rays were treated as a first refraction by the outer eyespot surface, a translation through the eyespot...
1984
Construction of Geological Sections of Folds with Steep-Limb Attenuation
William Daniel Gill
AAPG Bulletin
... rays" is determined by thinning ratios computed from the versed cosine formula. To eliminate elaborate graphical constructions, the positions...
1953
Abstracts: Application of CSP Gather Modeling for Determination of Velocity Smoothing Operator for Prestack Kirchhoff Depth Migration; #90173 (2015)
Hassan Khaniani and John C. Bancroft
Search and Discovery.com
... that appropriate smoothing is determined by optimizing between scattering of the rays, distorting the structure of the earth model, losing...
2015
Application of Computerised Radiography in Lieu of Film Radiography to Streamline On-Site Pipe Weld Quality Inspection Process
Mangala Fernando, Hamid Fard
Australian Petroleum Production & Exploration Association (APPEA) Journal
... to perform the weld inspections using CR. What is radiography? Radiography is a very old method of non-destructive testing. X-rays or Röntgen rays were...
2019
Abstract: Glacial-marine Sediments Record Ice-shelf Retreat During the Late Holocene in Beascochea Bay on the Western Margin of the Antarctic Peninsula
Laurin Hardin
Houston Geological Society Bulletin
... laminated sub-ice shelf facies can be clearly seen in the x-rays of these cores, and can be easily distinguished from the poorly sorted glacial-marine...
2010
Depressions In Shallow Marine Sediment Made By Benthic Fish: NOTES
David O. Cook
Journal of Sedimentary Research (SEPM)
... rays, skates, and flatfish, temporarily bury themselves in sediment and thereby create shallow depressions. These have been observed near shore...
1971
An Investigation Into the Effects and Implications of Gamma Radiation on Organic Matter, Crude Oil and Hydrocarbon Generation
Search and Discovery.com
N/A
Acquisition modeling for full waveform inversion model building in the Gulf of Mexico.
Search and Discovery.com
N/A
Introduction
Joann E. Welton
AAPG Special Volumes
... which produces various forms of radiation, such as secondary electrons, characteristic X-rays, auger electrons, backscatter electrons...
1984
Abstract: Nonmammalian Vertebrate Faunas from the Late Cretaceous of Wyoming
Brent H. Breithaupt
Earth Science Bulletin (WGA)
... nonmammalian vertebrate fossils found in Wyoming consist of remains of sharks, rays, bony fishes, frogs, salamanders, champsosaurs, turtles, lizards, mosasaurs...
1985
Abstract: Derivation of Seismic Depth Sections
H. Buchholtz, W. Houba
Geological Society of Malaysia (GSM)
... takes the effect of the refraction of rays exactly into account by considering the so-called thin-lens term in the migration algorithm. This technique...
1985
Abstract: A Time Migration before Stack
Richard C. Cooper, Malcolm R Hobson
Geological Society of Malaysia (GSM)
... in areas ofcomplex geology. 2. A velocity analysis procedure is inherent in the process. These velocities are derived along image rays and the"refore...
1990
Measurement of Dip Angles on Aerial Photographs: GEOLOGICAL NOTES
Louis Desjardins
AAPG Bulletin
..., and draw rays from P1 through P2^prime, T1, and B1. Lay this next over the right-hand photo so that the points marking P1 and P2^prime coincide as nearly...
1943
Developing Suitable X-Ray Radiography Techniques for Thin Rock Slabs: NOTES
D. G. Patchen
Journal of Sedimentary Research (SEPM)
.... According to the principle of radiography referred to as the inverse square law (Kod. Hdb.), if output of X-rays by the source remains constant...
1967
Xeroradiography: An Improved X-ray Method as Applied in the Study of Unopened Small-Diameter Sediment Cores: METHOD PAPER
B. R. Mcmullin, H. W. Van De Poll
Journal of Sedimentary Research (SEPM)
..., p. 464. BAKER, S. R., AND FRIEDMAN, G. M., 1969, A nondestructive core analysis technique using X-rays: Jour. Sed. Petrology, v. 39, p. 1371-1383...
1979
Heavy Mineral Concentration at the Bottom of Polychaete Traces in Sandy Sediment
Thomas R. Clifton
Journal of Sedimentary Research (SEPM)
... of box cores of shelf sand off the coast of California and Oregon show linear concentrations of grains opaque to X-rays. A number of the lines cross...
1984
Recognizing Estuarine and Tidal Creek Sandbars by Biogenic Sedimentary Structures: ABSTRACT
Taylor V. Mayou, James D. Howard
AAPG Bulletin
..., Clibanarius; blue crab, Callinectus; mantis shrimp, Squilla; and feeding depressions made by rays. Two subenvironments are found on most...
1969
Use of Radiography in Studying Textural and Structural Properties of Ancient Argillaceous Sediments Which Aid in Interpretation of Ancient Environments: ABSTRACT
W. Arthur White, I. Edgar Odom
AAPG Bulletin
... cannot be observed; (2) structural and textural features having the same absorption capacity for X-rays are not recorded on the film; and (3) film...
1969
Model Study of Morphologies Caused by Exploding Superheated Vapor and Possible Lunar Analogues: ABSTRACT
H. J. McCunn
AAPG Bulletin
... is violently explosive, and the materials are blown from the crater. These craters have blast rays and generally have smoothly sloping bottoms which contain...
1974
Novel Formation-Evaluation Concepts for Shale Reservoirs and Black Shale Formations: ABSTRACT
W. H. Fertl, H. H. Reike
AAPG Bulletin
... gamma-ray counts, the Spectralog measures the individual gamma rays emitted by potassium (K40), the uranium series nuclide bismuth (Bi214...
1979
Induced Spectroscopy: A Mineralogy-Lithology Well Log: ABSTRACT
Charles Flaum, Gordon Pirie
AAPG Bulletin
..., specifically with the induced gamma-ray tool (GST), measures the relative yields of gamma rays resulting from interactions of neutrons with different...
1981
Composition of Particles and Cements in Lower Cambrian Reefs and Precipitation of Metastable Carbonates in Paleozoic Ocean: ABSTRACT
Noel P. James, Colin F. Klappa
AAPG Bulletin
... (ooids, archaeocyaths, and Renalcis). Synsedimentary cements are (1) rays r botryoids in which each acicular crystal is a spar-filled mold, or (2...
1981