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The AAPG/Datapages Combined Publications Database
Showing 3,553 Results. Searched 196,956 documents.
Factors Affecting the Carbon and Oxygen Isotopic Composition of Marine Carbonate Sediments, Part III, Eniwetok Atoll
Jon N. Weber ,, R. F. Schmalz
Journal of Sedimentary Research (SEPM)
... as C13 decreases in the windward direction. DISCUSSION OF THE RESULTS Derivation of Carbonate Components of the Sediment The isotopic composition...
1968
Lithified Carbonates from the Deep-Sea of the Equatorial Atlantic
Geoffrey Thompson, V. T. Bowen, W. G. Melson, Richard Cifelli
Journal of Sedimentary Research (SEPM)
... another aspect of the problem of deep sea lithification of carbonate rocks. Derivation of the FIG. 2. [Grey Scale] Photograph of Sample 8-82, cruise 32...
1968
Bivergent Lithospheric Extension in the Slovak Part of the Danube Basin: Example of the Influence of the Lithospheric Processes on the Style of Development of the Basin
Igor HruΕ‘eck
AAPG Special Volumes
... and modified after J. Sefara and M. Bielik, 1996, personal communication; Hrusecky et al., 1998).As a wider background for the derivation...
2006
Fractional Dimension Rate Transient Analysis Applied to Parent-Child Effects in Unconventional Wells
Jorge A. AcuΓ±a
Unconventional Resources Technology Conference (URTEC)
... in the derivation of Acuna (2017) that uses the fracture system πβ and we will denote the corresponding skin as π. The conversion is: ππ = π π 2...
2023
Petrology of Upper Precambrian and Paleozoic Sandstones in the Pensacola Mountains, Antarctica
Paul L. Williams
Journal of Sedimentary Research (SEPM)
... Formation is surprising, considering the derivation of the formation from feldspar-rich source rocks and the lack of evidence of reworking. Correlative...
1969
Geological and Mineralogical Studies of Some Sand Deposits in the Nile Delta, U.A.R.
M. M. Kholief, E. Hilmy, A. Shahat
Journal of Sedimentary Research (SEPM)
.... Such partial derivation may affect the roundness of the sands derived from the fluviatile source. In fact, the admixture of more than one population...
1969
Rectification of Wind-Blown Sand
William H. Wood
Journal of Sedimentary Research (SEPM)
... numerator and denominator by s 2, we obtain the equation yi=[cixi]/[ cixi], or yi=ciuxi. In the derivation just given it was possible to omit from...
1970
Adaptive Time-stepping to Capture Induced Seismicity for Unconventional Reservoir Exploration
Zheng Han, Rami Younis
Unconventional Resources Technology Conference (URTEC)
... conditions. A particular focus is the derivation of an instability criterion for slip-weakening or rate-and-state friction models (e.g., Campillo and Ionescu...
2023
Chapter 1 - Grains: Quartz and Silica
Dana S. Ulmer-Scholle, Peter A. Scholle, Juergen Schieber, Robert J. Raine
AAPG Special Volumes
... cathodoluminescent SEM photomicrograph of a quartz arenite. Blue grains have the highest formation temperatures, suggesting derivation from plutonic or high-grade...
2014
Plagioclase Feldspar As An Indicator Of Provenance In Sedimentary Rocks
Edward D. Pittman
Journal of Sedimentary Research (SEPM)
... and Christie (1963) and Blatt (1967b) have conclude that some characteristics of polycrystalline quartz grains are indicative of derivation from...
1970
The Influence of Areal Trends on Correlations Between Sedimentary Properties
W. C. Krumbein, Thomas A. Jones
Journal of Sedimentary Research (SEPM)
...] [EQUATION] A similar derivation for the sum of squares SS(X), gives: SS(X) = JΓ12SS(U) + IΓ22SS(V) + 2Γ1Γ2SS(U,V) Finally, the covariance between Yij...
1970
Environmental Aspects of Clay Minerals
W. D. Keller
Journal of Sedimentary Research (SEPM)
... by alteration of volcanic ash in situ. Evidence for in situ volcanic derivation is positive, such as associated pyroclastic minerals and phillipsite...
1970
Mineralogy and Stratigraphy of Lower Tertiary Clays and Claystones of Alabama
William R. Reynolds
Journal of Sedimentary Research (SEPM)
...; Shepard and others, 1965; Ames and others, 1958; and Suzuki, 1961) and suggest the derivation of these minerals from the alteration of volcanic...
1970
Use of Multiphase Flowing Material Balance (FMB) to evaluate Refracs in the Eagle Ford
Steven Young, Trevor Stokes, Mathias Carlsen
Unconventional Resources Technology Conference (URTEC)
... The saturation constraint is given by ππ + ππ + π π€ = 1 (2) For completeness, the derivation of the general multiphase FMB equation from...
2023
Comparison of the Descriptors of Sediment Grain-size Distributions
Thomas A. Jones
Journal of Sedimentary Research (SEPM)
.... Eisenberger and Posner (1965) derived the optimum (minimum variance, umbiased) graphic estimators of the mean and standard derivation, and give tables defining...
1970
Multiphase Flowing Material Balance for Well Groups
Leslie Thompson, Barry Ruddick, Mathias Lia Carlsen, Curtis Hays Whitson
Unconventional Resources Technology Conference (URTEC)
... is given by ππ + ππ + π π€ = 1 (2) For completeness, the derivation of the general multiphase FMB equation from Thompson & Ruddick (2022...
2023
Continental Shelf and Upper Slope Sediments Off Portuguese Guinea, Guinea, and Sierra Leone, West Africa
Robert L. Mcmaster, John D. Milliman, Asaf Ashraf
Journal of Sedimentary Research (SEPM)
... to laterization during a previous low sea stand, but these iron-stained grains could also reflect derivation from the adjacent low lying lateritic coastal...
1971
Origin of Shell Beaches, Padre Island, Texas
Richard L. Watson
Journal of Sedimentary Research (SEPM)
... corresponds with a low in shell content. The shell percent curve is the second derivation of a three point moving average. End_Page 1107...
1971
Analytical and Machine Learning Based Modifications to Unconventional Reservoir Simulation Models to Capture Near-Fracture Transient Effects
Hector E. Barrios-Molano, Alvaro Rey, Shihao Wang
Unconventional Resources Technology Conference (URTEC)
... in the derivation of the analytical models. However, the use of the calibration factor makes possible to obtain a very close response to the refined...
2024
Diagenesis of Orthoquartzites Near Bogota Colombia
K. R. Aalto
Journal of Sedimentary Research (SEPM)
... of these features. 2. Polycrystalline quartz is more abundant among coarse-grained sandstones suggesting the derivation of monocrystalline End_Page 339...
1972
Industry Consortium Insights: Benchmarking Bottomhole Pressure Calculations in Tight Unconventionals
M. Carlsen, A. ProaΓ±o, V. Chavali, C. H. Whitson, M. M. Dahouk, S. Mydland, S. Liem, N. Longenbaugh, R. Sinha, J. Billings, D. Axelson, A. Lerza, B. Collins, N. Lightner, J. v. Dijken, I. Arguello, M. Watson
Unconventional Resources Technology Conference (URTEC)
...e separately, which is commonly referred to as mechanistic models. See full derivation here: https://wiki.whitson.com/pipeflow/well_pressure_calculation...
2024
The Nature and Occurrence of Heavy Minerals in Pleistocene and Holocene Sediments of the Lower Georgia Coastal Plain
John R. Hails, John H. Hoyt
Journal of Sedimentary Research (SEPM)
... of andalusite and garnet, indicate derivation mainly from a medium-grade metamorphic province. The source appears to be the Georgia Piedmont because...
1972
Surf Zone Shape Changes in Quartz Grains on Pocket Beaches, Cape Arago, Oregon
C. J. F. Rottmann
Journal of Sedimentary Research (SEPM)
... of sediment derivation from the Coaledo sandstones.) The bedrock strata sampled were restricted selectively to the coarse-grained sandstones forming...
1973
Heavy Mineral Assemblages in Some Tertiary Sediments in San Mateo County, California
Thomas T. Tieh
Journal of Sedimentary Research (SEPM)
...) derivation from pre-existing sediments. The immature texture of the Eocene sediments along the Accelerator excavation, as evidenced by the generally poor...
1973
Petrographic and Paleontologic Characteristics of the Rickreall Limestone (Eocene) of Northwestern Oregon
Sam Boggs, Jr., William N. Orr, Ewart M. Baldwin
Journal of Sedimentary Research (SEPM)
..., quartz, micas, and opaque minerals, and are mainly of volcanic derivation also. Some of the rocks contain non-carbonate matrix material. With a few...
1973