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The AAPG/Datapages Combined Publications Database
Showing 5,195 Results. Searched 200,619 documents.
The magnetic fabric of the Wolfcamp shale, Midland Basin, west Texas: Understanding petrofabric variability, hydrocarbon associations, and iron enrichment
Gerhard W. Heij, and R. Douglas Elmore
AAPG Bulletin
...:10.1002/9780470977811 Ferré, E. C., 2002, Theoretical models of intermediate and inverse AMS fabrics: Geophysical Research Letters, v. 29, no. 7, p. 31-1–31-4, doi...
2019
Fracture-enhanced Porosity and Permeability Trends in the Bakken Formation, Williston Basin, Western North Dakota
Wayne B. Freisatz
Williston Basin Symposium
...). The results of the thickness versus DST shut-in pressure analysis suggest a significant inverse relation and a good fit...
1995
Tiltmeter Mapping and Monitoring of Hydraulic Fracture Propagation in Coal: A Case Study in the Warrior Basin, Alabama
George A. Gazonas, Chris A. Wright, M.D. Wood
Rocky Mountain Association of Geologists
... knowledge of the surface tilt field is known, then solution of the inverse problem yields estimates of the source parameters. The method used to solve...
1988
Mapping of Salt Structures in the Gulf of Mexico Using Marine CSEM
J.J. Zach, M.A. Frenkel, P. Lindhom, A.M. Ostvedt-Ghazi, A. Kumar, T. Pham
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
... an adjoint state method. In the optimization or update part of the iterative inversion, an approximation to the inverse Hessian matrix of second...
2009
The Evolution of FWI and its Perceived Benefits
Tony Martin, Andrew Long
Australian Petroleum Production & Exploration Association (APPEA) Journal
... inverse problem, as the data used for the process is limited, both in its geometry and characteristics, such as frequency bandwidth. Without access...
2019
Fracture and Matrix Permeability Hysteresis in Organic Rich Mudrocks
Tadesse Weldu Teklu, Xiaopeng Li, Zhou Zhou, Qi Cui, Hazim Abass
Unconventional Resources Technology Conference (URTEC)
...) increases effective matrix permeability back, but with a hysteresis. The inverse relation of molecular diffusion vs pressure is also playing role...
2016
Diving wave tomography: Velocity modelling using first arrival traveltime
Amatul Syafi Abdul Basit, Abdul Rahim Md Arshad, Arulini Permalu
Geological Society of Malaysia (GSM)
... in forward modelling process. 1 ] = ˅ v(x) 2 = 1 v 2(x,z) s2 = 12 v (3) Where t is the traveltime and s2 is the slowness-squared or the inverse...
2022
Secondary Gypsum of the Sulphur Series, Sicily, and the So-called Integration
Leo Ogniben
Journal of Sedimentary Research (SEPM)
... conditions are described in detail in a larger Italian paper. In the Gypsum formation primary anhydrite and primary gypsum are varved rocks with inverse...
1957
Paleotectonic Restoration and Simulation Modeling Applicable to the Louisiana Offshore
Greg Whittle , Christopher G. St. C. Kendall , Michael A. Fogerty , Allen Lowrie
GCAGS Transactions
... to the measured sequences. Simulated stratigraphy is inverse modeling, operated on an interactive computer program (SEDPAK), which constructs models...
1992
Sources of Hydrocarbon-Rich Fluids Advecting on the Seafloor in the Northern Gulf of Mexico
Baoshun Fu, Paul Aharon
GCAGS Transactions
... enrichments. The occurrence of microbial sulfate alteration in seep sediments is supported by the observed inverse linear correlation between...
1998
Heavy Mineral Concentrating Processes and Density/Shape/Size Equilibria in the Marine and Coastal Dune Sands of the Apalachicola, Florida, Region
Frank W. Stapor, Jr.
Journal of Sedimentary Research (SEPM)
... to be the basis for settling equivalence comparisons. It can be argued, however weakly, that as deposition is an inverse analogue of entrainment, all grains...
1973
Injected Sand Sills in a Strike-slip Fault Zone: A Case Study from the Pil'sk Suite (Miocene), Southeast Schmidt Peninsula, Sakhalin
David Macdonald, Rachel Flecker
AAPG Special Volumes
... and top of the layer (coarse tail grading; Figure 6). This gives a grading profile of normal to inverse, whereas turbidites commonly exhibit either...
2007
Correlative Lowstand Deltaic and Shelf Systems in the Guadix Basin (Late Miocene, Betic Cordillera, Spain): The Stratigraphic Record of Forced and Normal Regressions
Jesus M. Soria, Juan Fernandez, Fernando Garcia, Cesar Viseras
Journal of Sedimentary Research (SEPM)
... and shows inverse grading (Fig. 8F), with large clasts projecting above the top, lending it a characteristic uneven topography. The clasts are angular...
2003
Quantifying Detection Limits and Uncertainty in X-ray Diffraction Mineralogical Assessments of Biogenic Carbonates
Karen L. Vyverberg, John M. Jaeger, Andrea Dutton
Journal of Sedimentary Research (SEPM)
...: 10.1039/a908609i Lavagnini, I., and Magno, F., 2006, A statstical overview on univariate calibration, inverse regression, and detection limits: application to gas...
2018
Concentration-Dependent Flow Stratification In Experimental High-Density Turbidity Currents and Their Relevance To Turbidite Facies Models
Matthieu J.B. Cartigny,, Joris T. Eggenhuisen, Ernst W.M. Hansen, George Postma
Journal of Sedimentary Research (SEPM)
... Review E, v. 59, p. 4445– 4457. Dasgupta, P., and Manna, P., 2011, Geometrical mechanism of inverse grading in grain-flow deposits: an experimental...
2013
Deep Marine Conglomerate Facies and Processes in Cretaceous Forearc Basins of Baja California, Mexico
William R. Morris, Douglas P. Smith, Cathy J. Busby-Spera
Pacific Section SEPM
... and conglomeratic breccia in beds up to 10 m thick. Local development of thin basal zone of inverse grading and protrusion of clasts above the upper...
1989
Trishear: A Review of Kinematics, Mechanics, and Applications
Stuart Hardy, Richard W. Allmendinger
AAPG Special Volumes
...., 1998, Inverse and forward numerical modeling of trishear fault-propagation folds: Tectonics, v. 17, p. 640656, doi:10.1029/98TC01907.Allmendinger, R...
2011
Basin-Floor Fans in the North Sea: Sequence Stratigraphic Models vs. Sedimentary Facies
G. Shanmugam , R. B. Bloch , S. M. Mitchell , G. W. J. Beamish , R. J. Hodgkinson , J. E. Damuth , T. Straume , S. E. Syvertsen , K. E. Shields
AAPG Bulletin
...; clastic injections; floating mudstone clasts; planar clast fabric; inverse grading of clasts; and moderate-to-high matrix content (5-30%). Many f the cored...
1995
Extended Abstract: Water Influx Predictions in Reservoirs with Aquifer Drive Using the Two-Phase Reservoir Integral Type Pseudo-Pressure with Applicability in Gas Hydrate Reservoirs
Melvin Kome, Mohd Amro
Africa Energy and Technology Conference, 2016
...ry inverse Laplace solutions are estimated thus producing from the water layer could be beneficial to easy and faster depressurization of the hydrate lay...
2016
Heterogeneity of Microscale Lithology and Pore Systems in an Upper Cretaceous Eagle Ford Group Horizontal Core, South Texas, U.S.A.
Robert M. Reed, J. Evan Sivil, Xun Sun, Stephen C. Ruppel
GCAGS Journal
... in some of the slices. Silicon shows relatively weaker laminations (Fig. 3C), which are generally the inverse in intensity of the laminations shown...
2019
Natural Fractures in the Niobrara Formation, Boulder to Lyons, Colorado
Michael D. Collins, Stephen A. Sonnenberg
Rocky Mountain Association of Geologists
... in previous works (Barlow, 1985, Longman et al., 1998). The amount of calcite vs. clay plus quartz has an inverse relationship within the given units. When...
2014
Tiltmeter data inversion for reservoir integrity monitoring using numerical modelling and particle swarm optimisation
Reza Abdollahi, Abbas Movassagh, Dane Kasperczyk, Manouchehr Haghighi
Australian Energy Producers Journal
... for calculating stress and strain distributions. A critical objective of this study is to perform inverse modelling to determine the loading distribution...
2025
Western Interior Carbonates: Wyoming’s Rare Jurassic Oolitic Eolianites
James L. Strasen, Henry S. Chafetz
Rocky Mountain Association of Geologists
... laminations are the visible manifestation of coarsening-upward, i.e., inverse grading (Fig. 10b), of the sediment produced by migrating wind ripples. Inverse...
2024
Geomorphology and Sedimentology of Humid-Temperate Alluvial Fans, Central Virginia
R. Craig Kochel, Robert A. Johnson
CSPG Special Publications
... illustrates typical inverse grading observed in the 1969 deposits in the Nelson County area. Inverse grading is common in debris flow deposits because...
1984
A Unique Mass Flow Marker Bed in a Miocene Streamflow Molasse Sequence, Switzerland
Heinz M. Burgisser
CSPG Special Publications
... International Sedimentological Congress, Hamilton, Canada, Book of Abstracts, p. 152. Naylor, M.A. 1980. The origin of inverse grading in muddy debris flow...
1984