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The AAPG/Datapages Combined Publications Database
Showing 768 Results. Searched 195,452 documents.
Spur and Groove Formation on the Florida Reef Tract
Eugene Shinn
Journal of Sedimentary Research (SEPM)
... to the backward thrust, in 10 feet of water, which increases as the water shallows (fig. 5). The net result is a slow movement of wave-generated current...
1963
Abstract: Inexact Full Newton Method for Full Waveform Inversion Using Simultaneous Encoded Sources; #90187 (2014)
Amsalu Y. Anagaw and Mauricio D. Sacchi
Search and Discovery.com
... sources using the forward and backward substitutions. The modelled data can then computed as dcal (ω) = rps (ω), where r is a sampling s,r operator...
2014
Abstract: Reverse Time Migration of Prestack Elastic Data; #90224 (2015)
R. Ferner and M. D. Sacchi
Search and Discovery.com
... . Although the forward process is outlined, this algorithm can be run forwards or backward in time. Depicted is the second-order finite-difference stencil...
2015
Abstract: Elastic Full Waveform Inversion For Land Walkaway VSP Data; #90224 (2015)
Olga Podgornova, Scott Leaney, Marwan Charara, and Eric von Lunen
Search and Discovery.com
.... Basically, the gradient for the model parameters is a crosscorrelation in time of the forward-propagated wavefield and backward-propagated residuals...
2015
Computer Model
David M. Rubin
Special Publications of SEPM
... of the bed surface and displays that surface in three-dimensional perspective. The program then migrates the bedforms backward through time and space...
1987
NEW TECHNIQUES IN ELECTRONIC POSITIONING FOR AEROMAGNETIC SURVEYS
T. C. Oftelie
Asociación Venezolana de Geología, Minería y Petróleo (AVGMP)
... and their frequencies are compared to two similar beams directed backward. The frequency difference is calibrated to indicate the aircraft speed...
1959
Structural Interpretations in Southwestern North Dakota
MILLER HANSEN
North Dakota Geological Society
... in late Mississippian time. Following this one more step backward in time, it is not unreasonable to suggest...
1954
Ventura Avenue Field Landslides
Henry H. Neel
Pacific Section of AAPG
... planes. This gives the Slide No. 7 a more or less “textbook” backward rotation on a curved slide surface. The deepest part of Slide No. 7...
1969
Overturned Folds, Superposed Thrusts and Structural Overprints near Sungai Buah, Selangor
Zaiton Harun, H. D. Tjia
Geological Society of Malaysia (GSM)
... us localt/cd "backward thrusting". INTRODUCTION Improvements to narrow main roads in the surroundings of Bangi, Selangor, have exposed better...
1984
Simultaneous inversion of velocity and angle-dependent reflectivity
Nizar Chemingui, Yang Yang, Jaime Ramos-Martinez, Guanghui Huang, Dan Whitmore, Sean Crawley, Elena Klochikhina, Sriram Arasanipalai
International Meeting for Applied Geoscience and Energy (IMAGE)
... stacks, e.g., near and far angle stacks shown in Figures 2E and 2F respectively. The forward and backward propagation are based on the wave equation...
2023
A Comprehensive Approach to Depth Imaging in Thrust Belt Environments
Ron Schmid, Brian Link, Patrick Butler
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
... tomography requires picking the residual NMO on depth migrated gathers along a continuous horizon. Iterative ray tracing is used to backward propagate...
1997
Fracture Network Characterization of Naturally Fractured Reservoir Using Artificial Neural Network and Fractal Methods
Doddy Abdassah, Sani O. Wahyu
Indonesian Petroleum Association
... Perminyakan ITB, Bandung. Naturally fractured reservoir1,3 has it own specificity and heterogeneity that make it very hard in prediction...
1998
Utilizing A Viscoplastic Stress Relaxation Model to Study Vertical Hydraulic Fracture Propagation in Permian Basin
Shaochuan Xu, Fatemeh Rassouli, Mark Zoback
Unconventional Resources Technology Conference (URTEC)
... measured B, n, and the least principal stress to backward calculate the total strain ε 0, which is about 2×10-3. Then, applying this total strain...
2017
Anatomy of Hinterland Depositional Sequences: Upper Cretaceous Fluvial Strata, Neuquen Basin, West-Central Argentina
Leonardo Legarreta, Miguel Angel Uliana
Special Publications of SEPM
... backward stepping complexes finally capped by to 3 my episodicity and were iterated nine times suggesting a 1 forcing these stratal patterns produced...
1998
Measuring Modern Sedimentation Rates in Caddo Lake (LA, TX) Using 137Cs Depth Profile
Jerry Lisantti
GCAGS Transactions
... this projects backward from 1963 to 1952, the time of the first thermonuclear test. The amount of sediment above the point where the drop off begins...
2001
Onlap and Strike-Overlap: DISCUSSION
H. R. Lovely
AAPG Bulletin
.... This writer is not certain on the following point, but there is at least a possibility that the present backward state of stratigraphic knowledge is partly...
1948
Fracture Development and Mechanical Stratigraphy of Austin Chalk, Texas: REPLY
Kevin P. Corbett , Melvin Friedman , John Spang
AAPG Bulletin
... through variable selection techniques (forward elimination, backward elimination, maximum R2 improvement, and stepwise regression), of which Nolen...
1989
Abstract: On Choosing Differential Operators; #90171 (2013)
John C. Bancroft
Search and Discovery.com
...! ( x ) = h2 h3 f '' ( x ) − f ''' ( x ) + ... 2! 3! , and assuming again that the second and higher derivatives are zero we get the backward...
2013
Abstract: On Choosing Differential Operators; #90171 (2013)
John C. Bancroft
Search and Discovery.com
...! ( x ) = h2 h3 f '' ( x ) − f ''' ( x ) + ... 2! 3! , and assuming again that the second and higher derivatives are zero we get the backward...
2013
Abstract: Making FX Interpolation More Robust by Spectrum-guided Reconstruction; #90171 (2013)
Mostafa Naghizadeh and Mauricio Sacchi
Search and Discovery.com
... [email protected] , [email protected] Summary In this paper the spectrum of prediction filters is used to find a region of support (in the wavenumber...
2013
Abstract: A Phase Shift Plus Interpolation Extrapolation for Two-way Wave Equation Migration; #90172 (2014)
Jianhua Pan
Search and Discovery.com
... assumes source and receiver wavefields only travel in one direction, i.e. forward for the source wavefield and backward for the receiver wavefield...
2014
Abstract: Applicability of TTI RTM to Structured Land Datasets; #90172 (2014)
Charles Ursenbach, Yan Yan
Search and Discovery.com
... depth migration by backward time propagation: SEG Expanded Abstracts, 2, 382. Zhang, Y. and Sun, J., 2009, Practical issues of reverse time migration...
2014
Abstracts: Full Waveform Inversion with Total Variation Regularization; #90173 (2015)
Amsalu Y. Anagaw, Mauricio D. Sacchi
Search and Discovery.com
... and background velocity, the forward problem is efficiently solved for multiple sources using the forward and backward substitutions. The same...
2015
Hydrides and Anhydrides, by C. Warren Hunt
Search and Discovery.com
N/A
Matzen Field Redevelopment, Pitfalls and Ways to Improve, #20287 (2014).
Rudolf Finsterwalder
Search and Discovery.com
...; prediction versus well results, trends. Facies, permeabilty, Sw, simulation (not presented). Methods Adequate or misleading, reasons for pitfalls...
2014