Spherical-Wave Computational AVO Modelling in Elastic and Anelastic Isotropic Two-Layer Media; #41564 (2015)

Arnim B. Haase, Charles P. Ursenbach

Search and Discovery.com

...Spherical-Wave Computational AVO Modelling in Elastic and Anelastic Isotropic Two-Layer Media; #41564 (2015) Arnim B. Haase, Charles P. Ursenbach...

Factors Affecting the Distribution of Opposing Mollusk Values

Louis S. Kornicker, Charles D. Wise, Juanita M. Wise

Journal of Sedimentary Research (SEPM)

... length and the percentage of excess valves, with the number of excess valves being significant only in collections having an average valve length...

Recognition and Significance of Inherited Quartz Overgrowths in Quartz Arenites

Ivan D. Sanderson

Journal of Sedimentary Research (SEPM)

... in abstract experiments are not known and must be derived from petrographic data. If a roughly spherical grain has an inherited cement coating...

The Problem of Orogenesis in the Light of New Field and Experimental Evidence*

Walter H. Bucher

CSPG Bulletin

... Society of Petroleum Geologists in Calgary on May 23, 1957. End_Page 138------------------------ The writer suggests that the excess heat and volatiles...

Abstract: Stratigraphically Useful Cretaceous Microfossils-Incertae Sedis

R. P. Zingula

GCAGS Transactions

... ranging in age from Upper Jurassic to Upper Cretaceous. Calcisphaerulids, the spherical bodies so abundant in the "spherulitic lime" of the Washita...

Sources of Pleistocene and Holocene Sand for Northeast Gulf of Mexico Shelf and Mississippi Fan: ABSTRACT

Jim Mazzullo, Charles Bates

AAPG Bulletin

... province, characterized by spherical quartz grains derived from older strata in the drainage basin of the Mississippi River, and the eastern Gulf...

Effect of Spherical Pore Shapes on Acoustic Properties in Carbonates, by Gregor T. Baechle, Layaan Al-Kharusi, Gregor P. Eberli, Austin Boyd, and Alan Byrnes, #50047 (2007).

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Marcasite in Black Shales—a Mineral Proxy for Oxygenated Bottom Waters and Intermittent Oxidation of Carbonaceous Muds

Juergen Schieber

Journal of Sedimentary Research (SEPM)

... and is closely associated with irregular patches of pyrite microcrysts and remnant spherical shapes consisting of pyrite microcrysts (Fig. 2A). Features...

Early Diagenetic Silica Deposition in Algal Cysts and Spores: A Source of Sand in Black Shales?

Jurgen Schieber

Journal of Sedimentary Research (SEPM)

... of compaction, a small proportion are filled with diagenetic silica. The latter are spherical to ellipsoidal (0.1-0.5 mm), and filled with chalcedony, microquartz...

Abstract: Microbial Biomineralization Processes Forming Stromatolitic Dolostone From the Ediacaran in the Sichuan Basin, Northeast China; #90310 (2017)

Jie Zhang

Search and Discovery.com

... of stromatolitic dolostone and found abundant spherical, oval-like dolomites, the size of which are 5-15 microns. It is the first time...

Gypsum-Oolite Dunes, Great Salt Lake Desert, Utah

Daniel J. Jones

AAPG Bulletin

... bedding planes are few, and nowhere in excess of 10°. However, cumulative series of these minor discordances give a general impression of convexity...

Intratest Porosity in Foraminifera

Richard T. Bachman

Journal of Sedimentary Research (SEPM)

... sediment porosity can be corrected for the "excess" water. Previously, only a few estimates of the fraction of total sediment porosity attributable...

Abstract: Amplitude variation with offset (AVO) inversion modeling with a local elastic solver

Ligia Elena, Jaimes Osorio, Alison Malcolm

Atlantic Geology

..., the wave reflections are better modeled by spherical waves than planar waves. Indeed, spherical reflection coefficients vary from planar reflection...

Correlation of Mean Sizes Obtained from Size Measurement by Thin-Section and Loose-Grain Methods: ABSTRACT

Basanta K. Sahu

AAPG Bulletin

...) Wicksell's or Krumbein's corrections based on probability of sectioning spherical grains at random can be used to yield loose-grain size moments from...

Synthesis of spherical and faceted ?-Fe2o3 nanoparticles, their encapsulation in mesoporous Sio2 nano cells and their use as H2S adsorbents

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A Contact Gage for Rapid and Accurate Three-Dimensional Grain Size Measurement of Loose Sand Particles: NOTES

Hassan G. Modarresi

Journal of Sedimentary Research (SEPM)

... is commonly visualized as a reference to which certain diameters and hence the shape of a non-spherical grain is compared (Krumbein, 1941). The three...

An Optical Interferometric Method for the Measurement of Microdeformation in Sediments: RESEARCH METHOD PAPER

Nils-Gunnar Ohlson , Dorothy Guy-Ohlson

Journal of Sedimentary Research (SEPM)

... constants E and v can be determined in the same way as for any kind of solid, provided that time is allowed for the excess water to be squeezed out...

Intelligent evaluation and prediction of reservoir based on machine learning method

Wenjun Zhao, Tangyan Liu

International Meeting for Applied Geoscience and Energy (IMAGE)

... of spherical-tubular model are used parameters from optimal spherical-tubular model inversion. Using machine learning, we aspire to provide more precise...

A Method of Comparing Volume Measurements on Pebbles

R. J. Hughes, Jr.

Journal of Sedimentary Research (SEPM)

... in sphericity measurements. Previous experiments in the writer's laboratory utilizing water for direct volume measurements proved unsuccessful. Excess water had...

Some "Quick-Look" and Wellsite Applications of Wireline Formation Testing Tools with Emphasis on Permeability Indicators as an Aid to Choosing Net Pay Discriminators

P. Cooke-Yarborough

Indonesian Petroleum Association

.... This is no great problem as effective permeabilities in excess of 100 millidarcies in a damaged zone will often be very welcome values! At very low...

Geomechanical modeling of stresses adjacent to salt bodies: Part 2Poroelastoplasticity and coupled overpressures

Maria A. Nikolinakou, Gang Luo, Michael R. Hudec, Peter B. Flemings

AAPG Bulletin

... evolve in sediments bounding a spherical salt body. Drained analyses (pore pressures remain hydrostatic) demonstrate that sediments yield in response...

A Textural Inversion Phenomenon Within Lower Jurassic Red Beds of the Ardon Formation, Makhtesh Ramon, (Israel)

Ron Goldbery

Journal of Sedimentary Research (SEPM)

... spherical, well rounded very well-sorted, coarse quartz grains, dispersed within an argillaceous silty micrite. The former is indicative of high energy...

Collophane from Miocene Brown Shales of California

E. Wayne Galliher

AAPG Bulletin

... somewhat. "Sporbo" occurring in the Belridge field at a depth of 4,535 feet (Belridge Oil Company's No. 15) have both ovoid and almost spherical shapes...

Bubble Characteristics in Gassy Sediments

Thomas H. Orsi, Aubrey L. Anderson

GCAGS Transactions

... bubbles with diameters generally greater than 2 mm and free gas volume fractions ranging from essentially zero to in excess of 0.08. The vertical...

Characterizing maturity of reservoir pyrobitumen with strong anisotropy: A calibration between reflectance and laser Raman spectral parameters

Zhaoxi Zuo, Jian Cao, Xiaolin Wang, Bing Luo, Yuan Zhong, Kunyu Li, and Kai Hu

AAPG Bulletin

... of irregularly mosaic-, spherical-, flow-, and fibrous-textured pyrobitumen is relatively stable and correlates well with Raman spectral features. In contrast...