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The AAPG/Datapages Combined Publications Database

Showing 1,445 Results. Searched 200,639 documents.

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Ascending

Structure of the Tokai segment from the integrated high-resolution seismic imaging: A case study from the eastern Nankai Trough

Andrzej Grszczyk, Rafael Almeida, Romain Brossier, Ludovic Mtivier

International Meeting for Applied Geoscience and Energy (IMAGE)

.... By following the rays (Fig. 2b) which cause the weak first-arrivals marked by the magenta solid line (-30 km to -10 km in Fig. 2a), one can observe...

2022

Liquids-Rich Resource Play Characterization Using Well Log Analysis Calibrated with Rock Properties from Drill Cuttings

E.T. Vosburgh, O.A. Djordjevic, J.A. Rushing

Unconventional Resources Technology Conference (URTEC)

... on diffraction of x-rays by the crystal planes of various minerals. All materials with a crystalline structure (particularly clays and shales) exhibit...

2013

Precambrian Stromatolites as Indicators of Polar Shift

Stephan C. Nordeng

Special Publications of SEPM

... water angle at which receive the sun cal This would a colony actual s rays would is 480 to the verti seemingly about to colonies...

1963

Multiscale (nano to mm) Porosity in the Eagle Ford Shale: Changes as a Function of Maturity

Lawrence M. Anovitz, David R. Cole, Alexander M. Swift, Julia Sheets, Harold W. Elston, Susan A. Welch, Steve J. Chipera, Ken C. Littrell, David F. Mildner, Matthew Wasbrough

Unconventional Resources Technology Conference (URTEC)

... power of neutrons, relative to X-rays, allows analysis of thicker rock samples by neutron scattering. The SLD of phase j is given by: r*j = åi=1 bi n r...

2014

Application of Oxygen Activation Logging for Detecting Water Flow Behind Casing/Tubing in Minas Field

Rinaldi

Indonesian Petroleum Association

... 10 MeV) and measuring their decay by counting the emitted gamma rays (GR). The water movement is identified by an increased gamma ray count rate...

1995

Chemical Considerations Regarding Origin of Petroleum

Benjamin T. Brooks

AAPG Bulletin

... hydrocarbons which he has obtained by the action of alpha rays on gaseous hydrocarbons. The accumulation of chemical and geological facts points decisively...

1931

Early Cretaceous Elasmobranchs from the Newcastle Sandstone (Albian) of Crook County, Wyoming

David Cicimurri

Rocky Mountain Association of Geologists

.... Deacon, P. Last, J.E. McCosker, T.I. Walker, and L. Taylor, 1997, The Nature Company Guide to Sharks and Rays: Time Life Publishing, U.S.A., 228 p...

2000

Seismic first arrival tomography for top salt velocity update: A case study in the Santos Basin, Brazil

Paulo H. B. Alves, Marco Cetale, Roger M. Moreira, Sérgio L. E. F. da Silva, Jorge Lopez

International Meeting for Applied Geoscience and Energy (IMAGE)

... implemented in this study uti- lizes a highly accurate and parallel implemented eikonal solver which minimize errors during propagation. Rays are traced...

2024

High-resolution Measurements of Elasticity at Core Scale. Improving Mechanical Earth Model Calibration at the Vaca Muerta Formation.

Anton Padin, Gilles Pijaudier-Cabot, Alain Lejay, Hamid Pourpak, Jean-Philippe Mathieu, Atef Onaisi, Gregory Boitnott, Laurent Louis

Unconventional Resources Technology Conference (URTEC)

... gamma rays to provide calibrated quantitative measurements of bulk density each cm; an (2) Impulse Hammer™ tool (Boitnott et al., 2017), which measures...

2019

Seismic tomographic cross-sections of the Bowser Basin in northwest British Columbia, Canada

David B. Snyder, Brian J. Roberts

CSPG Bulletin

... 100 m horizontally by 100 m vertically. Using this set of rays (seismic wavepaths), four to five tomographic iterations used an ever-decreasing maximum...

2007

Enhancing Surface Production Measurements and Simplifying Field Architecture With Multiphase Flow Meters in the Permian and Eagle Ford Shale

Katharine Moncada, Liviu Husoschi, Bertrand Theuveny

Unconventional Resources Technology Conference (URTEC)

... each pure phase of oil, water and gas has a unique linear attenuation of the LE and HE gamma peaks. When gamma-rays are radiated from the source...

2023

Unlocking Gas Potential in Deep Shale by Advanced Pulsed Neutron Logging Behind the Casing: Case Study in Sichuan Basin, China

Shi Fang, Zuo An Zhao, Kai Xuan Li, Yue Wang, Jin Long Wu, Xian Ran Zhao, Hui Geng Li

Unconventional Resources Technology Conference (URTEC)

... on the measurement of inelastic gamma rays from the deep detector which is directly proportional to the fast neutron flux in the formations...

2024

Flora and Climate of the Olmos Formation (Upper Campanian – Lower Maastrichtian), Coahuila, Mexico: A Preliminary Report

Emilio Estrada-Ruiz, Garland R. Upchurch, and Sergio R. S. Cevallos-Ferriz

GCAGS Transactions

... of axial parenchyma, scalariform perforation plates, and heterocellular rays (Figs. 5A-C). A second type represents Malvaceae (hibiscus family...

2008

A Quantitative X-Ray Diffraction Technique Applied to Fine-Grained Sediments of the Deep Gulf of Mexico

S. B. Devine , R. E. Ferrell, Jr., G. K. Billings

Journal of Sedimentary Research (SEPM)

... the primary X-ray beam below 4°2, and low angle scattering of X-rays from the glass slide occurs. This was partially overcome by fitting the diffraction...

1972

Improving the Accuracy of Nuclear Spectroscopy Logs in the Permian Basin by Calibrating Elemental Composition with Mixed-Lithology Core Chemistry

Hernan Mora, Weijun Guo, Yasin Abulaiha, Haijing Wang, Michael Cheshire, Aygul Kostinovsky, Luisa Crousse, Mason Edwards, Bobby Kurniawan

Unconventional Resources Technology Conference (URTEC)

... for high-energy gamma rays (GR). Twenty elemental standards are available for spectroscopic analysis solving for elemental yields. Automatic gain...

2025

Design and Calibration of a Photo-extinction Settling Tube for Grain Size Analysis

Asahiko Taira , Peter A. Scholle

Journal of Sedimentary Research (SEPM)

... light rays. The reception of scattered rays is prevented by the photocell slits which allow only undeviated rays to pass. Thus, the transparent particles...

1977

Quartz-Grain Surface Features of Mesozoic-Cenozoic Sands from the Labrador and Western Greenland Continental Margins

Roger Higgs

Journal of Sedimentary Research (SEPM)

... of X-rays emitted during SEM viewing (measured using a Kevex-Ray detector). Kaolinite (Fig. 9a) is distinguished by its characteristic "booklets...

1979

The Pliocene Glenns Ferry Oolite: Lake-margin Carbonate Deposition in the Southwestern Snake River Plain

Krystyna Swirydczuk, Bruce H. Wilkinson, Gerald R. Smith

Journal of Sedimentary Research (SEPM)

... on the deeper water bench slope. ASSERETO, R., AND FOLK, R. L., 1976, Brick-like texture and radial rays in Triassic pisolites of Lombardy, Italy: a clue...

1979

Porosity Logs: Chapter IV

George B. Asquith, Charles R. Gibson

AAPG Special Volumes

... of a medium-energy gamma ray source that emits gamma rays into a formation. The gamma ray source is either Cobalt-60 or Cesium-137. Gamma rays collide...

1982

Acquisition and Ananlysis of Wide-Angle Reflection and Refraction Seismic Data

Paul L. Stoffa

Circum Pacific Council Publications

... of the receiving array form the basic-data ensemble. But, the rays of the seismic waves that penetrate the subsurface and are recorded at the various receiver...

1989

Ecological Changes in a Massive Fresh-Water Clay Sequence

J. M. Coleman

GCAGS Transactions

... for detecting sedimentary structures in "massive" appearing sediments. The method is simple, rapid, and non-destructive and consists of transmitting X-rays...

1966

The neoichnology of a semi-terrestrial fish: mudskipper trackways in mud-dominated and sand-dominated substrates

John-Paul Zonneveld, Aswan, Russell L. Ciochon, Riley Morton, Yan Rizal, Maria Rodriguez, Yahdi Zaim, Neil H. Shubin

PALAIOS

... 2009). The pectoral fins are long, protrude from the body, and have a joint between the fin radials and rays that allows movement analogous to an elbow...

2025

Travertines: Depositional Morphology and the Bacterially Constructed Constituents

Henry S. Chafetz, Robert L. Folk

Journal of Sedimentary Research (SEPM)

.... The rays almost invariably show a fine lamination that cuts across the crystals perpendicular to elongation (ray FIG. 8. [Grey Scale] Etched slab...

1984

Inferred Diagenetic History of a Weakly Silicified Deep Sea Chalk

Sherwood W. Wise, Jr. , Kerry R. Kelts

GCAGS Transactions

.... Discoaster overgrown by secondary calcite. Tell-tale signs of overgrowth include euhedral calcite crystal faces developed along rays, tripartite...

1972

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