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The AAPG/Datapages Combined Publications Database
Showing 3,149 Results. Searched 197,286 documents.
Chemical Constraints on Carbonate Sedimentation and Fabric Development, Barra Velha Formation, Santos Basin, Brazil
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Lateral Heterogeneity of Microscale Lithology and Pore Development in an Upper Cretaceous Eagle Ford Group Horizontal Core
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Nano-Scale Pore Structure Characteristics of Organic-Rich Longmaxi Shale Using Argon Gas Adsorption
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Magnetic Mineral Composition as a Potential Indicator of Depositional Conditions in Gas-Bearing Silurian Shale Rocks from Northern Poland
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Porosity Characterization of the Cretaceous Eagle Ford Formation
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ABSTRACT Petrography and Micropore Systems of Mudrocks Concretions Nodules and Ash from Devonian Shales in Highland and Bath Counties Virginia, #90104 (2010)
Haynes John T.; Rose Timothy R.; Goggin Keith E.; Whitmeyer Steven J.; Walker Seldon M.
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..., or pyrite framboids). We have also identified numerous submicron micromoldic or microintraparticle pores that are spherical to cylindrical. Euhedral...
2010
Quantitative Petrophysical AVO Error Analysis in a Layered Model
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... to inversion errors. Using plane-wave AVO theory to invert spherical-wave data (Haase and Ursenbach, 2007), or using isotropic AVO theory to invert...
2013
Abstract: Textural and Diagenetic Controls on Pore Systems in the Cretaceous Eagle Ford Formation; #90310 (2017)
Ilaria Gaiani, Andrew C. Aplin, Chris H. Greenwell, Pablo Cubillas, Ruarri J. Day-Stirrat
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... are interparticle, enclosed within the argillaceous and coccolithic matrix, whereas in most of the mature samples the pores present a more spherical...
2017
Abstract: Object Detection in SEM Images Using Convolutional Neural Networks: Application on Pyrite Framboid Size-Distribution in Fine-Grained Sediments;
Artur Davletshin, Lucy Tingwei Ko, Kitty Milliken, Priyanka Periwal, Wen Song
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... widespread occurrence in sediments of all geological ages. The external spherical or spheroidal (ellipsoidal) form and the internal discrete...
Unknown
Abstract: The Anthraxolite Evolution and Vanadium Enrichment Mechanism of the Upper Ordovician in the Northern Qaidam Basin, Northwest China;
Chenglin Liu
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..., Member c, Member d and Member e. Anthraxolite is mainly developed in the sandstone, limestone and phyllite of the O3tna. The spherical, flaky...
Unknown
Understanding Seismic Amplitudes, by Steve Henry, #40135 (2004).
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2004
Conceptual Geological Model about Hydrocarbon Flow Trough Fractures in Siliciclastic Sequences of the Chicontepec Formation; #41953 (2016)
Daniel E. Bolaños-Rodríguez, Manuel Cruz-Castillo, Adriana Acosta-Ángeles
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... parallel to So (st_1, vertical stylolites) & f_1 (folding) 4 1 1 3 2 Plane attitud measurement (3D planes) Fracture thickness Spherical projections...
2016
Characterization and Modeling of Multiple Scales of Lateral Petrophysical Heterogeneity within Dolomite Rock Fabrics as Determined from Outcrop Analogs, by Colette B. Hirstius, Matthew J. Pranter, David A. Budd; #90029 (2004)
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2004
Relating Small-Scale Permeability Heterogeneity to Lithofacies Distribution
Michael N. Gaud, Gary A. Smith, Sean A. Mckenna
Special Publications of SEPM
... 0.23 0.30 linear spherical spherical 1.00 1.18 1.00 5.75 3.20 7.00 N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. SGt 0° 90° vertical 20 55 60...
2004
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...
1984
Scales of lateral petrophysical heterogeneity in dolomite lithofacies as determined from outcrop analogs: Implications for 3-D reservoir modeling
Matthew J. Pranter, Colette B. Hirstius, David A. Budd
AAPG Bulletin
... variogram represents a model variogram. The porosity model variogram consists of a combination of a spherical model that represents the short-scale...
2005
Bifungites of Halli from the Ordovician (Caradocian) Trenton Limestone of the Quebec City Area
R. K. Pickerill, W. B. Forbes
Atlantic Geology
... dimensions of the parameters b (length of spherical dumb-bells), d width of basal chamber), 1 (total length of the trace), s (length of the basal chamber...
1977
Modeling the Semivariogram: New Approach, Methods Comparison, and Simulation Study
A. Gribov, K. Krivoruchko, J. M. Ver Hoef
AAPG Special Volumes
..., spherical or exponential) to the values. Three main approaches exist for estimating the parameters of the semivariogram model: visual, (weighted) least...
2006
Petrologic Method for Distinguishing Eolian and Marine Grainstones, Ste. Genevieve Limestone (Mississippian) of Indiana: Chapter 4
J. Robert Dodd, Charles W. Zuppann, Clayton D. Harris, Karl W. Leonard, Thomas W. Brown
AAPG Special Volumes
... grains not originally spherical is low. Fine laminations are not present, and no systematic grading is found on a thin-section scale. Fossils larger...
1993
Pisolites Formed from the Oilfield Water of the Luling Field, Caldwell County, Texas
Augusta Hasslock Kemp
Journal of Sedimentary Research (SEPM)
... agitated pools on the floor below.< P> The pisolites ranged from 3 mm to 50 mm in diameter, and their shapes ranged from spherical to ovoid...
1959
A Peculiar Pedestalate Terrace, San Nicolas Island, California: NOTES
Harold D. Palmer , David W. Scholl , Jack Green
Journal of Sedimentary Research (SEPM)
... to moderately well sorted medium grained arkosic sandstone [in which] large elongate to nearly spherical calcareous concretions ... occur in some...
1965
A Rapid Method for Determining Weight Percentages of Unsieved Heavy Minerals
Ralph E. Hunter
Journal of Sedimentary Research (SEPM)
...) for spherical grains of a given density () is easily calculated by the formula: grain weight=d3/6. Natural sand grains, however, are usually not spherical...
1967
Glossary
Joann E. Welton
AAPG Special Volumes
...-sea oozes of the temperate and tropical oceans, and were probably not common before the Jurassic. coccosphere: The entire spherical or spheroidal...
1984
Abstracts: An Investigation of Systematic Location Errors of Microseismic Events; #90173 (2015)
Martin E. Nicola, Bernd Milkereit, and Emmanuel Bongajum
Search and Discovery.com
... from wave fields in heterogeneous and homogeneous media. Borehole logs from Sudbury, have been used in a ray algorithm to produce travel time values...
2015
Abstracts: Influence of Hydrothermal Fluids on the Horn River Shale Sequence; #90173 (2015)
Ronald J. Spencer, Thomas Weedmark, Victoria Biersteker, and Jon Dola
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... tests are nearly spherical in the silica cemented and dolomite cemented examples in Figure 3 (left and right), but flattened in the uncemented example...
2015