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The AAPG/Datapages Combined Publications Database
Showing 5,188 Results. Searched 200,357 documents.
Carbonate Cycles in Upper Cretaceous (Campanian) Demopolis Chalk, West-Central Alabama
Jeffrey D. Warren , Charles E. Savrda
GCAGS Transactions
... was performed using a finite Fourier End_Page 487------------------------ transform (FFT) algorithm written for use with SAS statistical software...
1998
Integration of Vertical Seismic, Surface Seismic, and Well-log Data at the Mallik 2L-38 Gas-hydrate Research Well, Mackenzie Delta, Canada
M. W. Lee, T. S. Collett, W. F. Agena
AAPG Special Volumes
... used for the Fourier transform. Using the spectral ratio such as shown in Figure 9b, the quality factor of the P wave (Qp) for non-gas-hydrate-bearing...
2009
Relationship between mineralogy and porosity in seals relevant to geologic CO2 sequestration
Alexander M. Swift, Lawrence M. Anovitz, Julia M. Sheets, David R. Cole, Susan A. Welch, and Gernot Rother
Environmental Geosciences (DEG)
... cross section (), is proportional to the Fourier transform of the geometric correlation function (Debye, 1957), with the spatial periodicity being...
2014
EXTENDED ABSTRACT: Re-Evaluating Depositional Models for Shelf Shales
Janok P. Bhattacharya, James A. MacEachern
GCAGS Transactions
... that show both normal and inverse grading (Fig. 1), indicating sustained flows that waxed and waned. They also display low intensities of bioturbation (Fig...
2009
Can Dispersive Pressure Cause Inverse Grading in Grain Flows?: REPLY
Francois Legros
Journal of Sedimentary Research (SEPM)
...Can Dispersive Pressure Cause Inverse Grading in Grain Flows?: REPLY Francois Legros 2003 335 335 Vol. 73 (2003) No. 2. (March) HANES, D.M....
2003
1992
Abstract: Estimating Accuracies and Uncertainties of Quantitative Stratigraphic Predictions, by M. A. Lessenger and T. A. Cross; #90956 (1995).
Search and Discovery.com
1995
Abstract: Forward and Inverse Stratigraphic Modeling of Fluvial Systems: A Bridge to the Future of Reservoir Management, by D. Edington, T. Cross, and M. Lessenger; #90937 (1998)
Search and Discovery.com
1998
Abstract: Forward and Inverse Stratigraphic Modeling of Fluvial Systems: A Bridge to the Future of Reservoir Management, by D. Edington, T. Cross, and M. Lessenger; #90928 (1999).
Search and Discovery.com
1999
Abstract: Efficient Sampling of 3-D Basin Modelling Scenarios, by S. B. Nielsen and K. Gallagher; #90923 (1999)
Search and Discovery.com
1999
Abstract: Evolving Dynamic Subsidence in the Late Cretaceous of North America from Geodynamic Inverse Models, by L. Liu, S. Spasojevic, and M. Gurnis; #90090 (2009).
Search and Discovery.com
2009
Sequence Stratigraphic Boundary Delineation Based on Adaptive Seismic Decomposition
Search and Discovery.com
N/A
Exploration and Detection of Subsurface Water Using Broadband Electromagnetic Sensors
T. David McGlone
Environmental Geosciences (DEG)
... of direct current (DC) to 85 kHz (sample frequency of 170 kHz). A Fast Fourier Transform (FFT) was performed on the data, and the spectral results have...
1998
Image - Rays and the Treatment of Inhomogeneity in Migration
L. Hatton
Southeast Asia Petroleum Exploration Society (SEAPEX)
... reflections: Geophysics, v. 36, p. 510–516. Stolt, R.H., 1978, Migration by Fourier transform: Geophysics, v. 43, p. 23–48. Wave-equation migration...
1980
A Multi-Measurement Core-Log Integration for Advanced Formation Evaluation of Source Rock Formations: A Green River Case study
Stacy L. Reeder, Robert L. Kleinberg, Michael Herron, Alan Burnham, Pierre Allix
Unconventional Resources Technology Conference (URTEC)
... measurements: TOC = TC – TIC. Core mineralogy was determined by dual range Fourier transform infrared spectroscopy (DR-FTIR). Elemental analysis included X...
2013
Improving Depth Prediction Accuracy of Quantified Drilling Hazards
W. Scott Leaney, William H. Borland
Geological Society of Malaysia (GSM)
..., 1983). This algorithm relies on the fact that a spike at some time will Fourier transform to a harmonic (complex sinusoid) that is defined at all...
1996
Ergodic Sampling: A New Data Acquisition Method to Gather More Information
Mengli Zhang, Yaoguo Li
International Meeting for Applied Geoscience and Energy (IMAGE)
... in the transform domain when sampling a signal. SRF(i, j; i0 , j0 ) = |FFF 1 I (i i0 , j j0 )| (1) where F and F 1 denote respectively the 2D Fourier...
2023
High Resolution Aeromagnetics as an Aid to Structural Interpretation Over the Muturi PSC, Irian Jaya
Neil A. W. Moig
Indonesian Petroleum Association
... wavelengths overlap, and the best that can really be performed is to isolate responses over a particular depth range. From the fourier transform...
1994
Irian Jaya-Papua New Guinea Hydrocarbon Exploration: Constraints from Regional Distribution of Geothermal Gradients and Heat Flow
John D. Pigott
Indonesian Petroleum Association
..., 1986) of Fourier's heat flow equation in one dimension: where Q is heat flow (HFU; where 1 HFU = 1 mcal/cm s °C), K represents rock conductivity...
1994
Analysis of Modern Equatorial Tidal Periodicities as a Test of Information Encoded in Ancient Tidal Rhythmites
Allen W. Archer, Erik P. Kvale, Hollis R. Johnson
CSPG Special Publications
..., 1987, 1988, 1989) and analyzed with the fast-Fourier program described by Horne and Baliunas (1986). Examination of the spectral analysis for the three...
1991
An AI approach to using magnetic gradient tensor analysis for quick depth and property estimation
David A. Pratt, K. Blair McKenzie, Anthony S. White
Petroleum Exploration Society of Australia (PESA)
.... The field components are calculated by Fourier transformation of the total magnetic intensity grid and assume that the local regional has been removed...
2019
Resistivity Modeling as a Formation Evaluation Tool - Application of Resistivity-Tool-Response Modeling for Formation Evaluation - Archie Series No. 2
Hezhu Yin
AAPG Special Volumes
... tool is about inversion, and geophysical data inversion yields a non-unique formation-resistivity profile. Hence, the inverse modeling process must...
2011
Spatial Change of Grading Pattern of Subaqueous Flood Deposits In Lake Shinji, Japan
Yu Saitoh, Fujio Masuda
Journal of Sedimentary Research (SEPM)
... entering the lake. Most sand beds at shallow depths (< 4 m below the water surface) display triple stacks of inverse-to-normal grading. Single inverse...
2013
Spatial Change of Grading Pattern of Subaqueous Flood Deposits In Lake Shinji, Japan
Yu Saitoh, Fujio Masuda
Journal of Sedimentary Research (SEPM)
... the lake. Most sand beds at shallow depths (< 4 m below the water surface) display triple stacks of inverse-to-normal grading. Single inverse-to-normal...
2013
Photography and Geophysics: Abstract
Edward F. Haye
Tulsa Geological Society
... way to obtain surface geology. Possibly the geophysical tool most critically affected by the surface geology is gravity. Newton's first Inverse...
1965