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The AAPG/Datapages Combined Publications Database
Showing 44,998 Results. Searched 200,635 documents.
Petrology of the Simsboro Formation of Northeast Central Texas
Donald W. Kohls
Journal of Sedimentary Research (SEPM)
... to Calvert Bluff as a designation for the rock unit lying above the Simsboro Formation and below the Sabinetown Formation. Stenzel (1952, p. 33...
1967
Clast Fabric of Till and its Development
John F. Lindsay
Journal of Sedimentary Research (SEPM)
...-dimensional vector technique for analysing till fabrics: discussion and FORTRAN program: Geogr. Bull., v. 8, p. 151-165. ANDREWS AND KING, C.A.M., 1968...
1970
Sedimentology and Depositional Setting of the Upper Proterozoic Scanlan Conglomerate, Central Arizona
Larry T. Middleton, Alan P. Trujillo
CSPG Special Publications
... bracket deposition between 1.45 and 1.15 b.y. The basal unit of the Apache Group, the Scanlan Conglomerate, unconformably overlies older Precambrian...
1984
Landslide mapping and characterization for agriculturally intensive mountainous region of Cameron Highlands, Malaysia
Afiq F. A. Rahim, Abd Rasid Jaapar, Zakaria Mohamad
Geological Society of Malaysia (GSM)
... large” to “extremely large” was observed within the study area. Distribution by geological unit Landslide distribution based on geological lithology...
2021
Stratal Extension in Thrust Footwalls, Makran Accretionary Prism: Implications for Thrust Tectonics
John Paul Platt , Jeremy K. Leggett
AAPG Bulletin
... with estimates of the current plate convergence vector (Jacob and Quittmeyer, 1979; Quittmeyer and Kafka, 1984) and with focal-plane solutions from local...
1986
Robust joint inversion and segmentation of 4D seismic data
Juan Romero, Matteo Ravasi, Nick Luiken
International Meeting for Applied Geoscience and Energy (IMAGE)
... and each column is constrained to be in the unit simplex (see Ravasi and Birnie (2021) for details). Classes are arranged in a vector c = [c1 , c2...
2022
The Debeque Canyon Landslide at Interstate 70, Mesa County, West-Central Colorado
Jonathan L. White
Grand Junction Geological Society
..., as well as a thick problematic claystone unit that overlies the lower, massive, cliff-forming sandstone that is exposed at road level. The surficial...
2005
Cathaysia, Gondwanaland, and the Paleotethys in the Evolution of Continental Southeast Asia
Yuri G. Gatinsky, Charles S. Hutchison
Geological Society of Malaysia (GSM)
... tectonic elements (structural-formati onal unit~) for selected Phanerozoic time frame . We also pre ent a Phanerozoic sequence of palinspatic...
1986
Examining the significance of the converted-modes beneath an ultra-high-velocity caprock: Physical modeling and a Gulf of Mexico salt proximity VSP survey
Jingjing Zong, Yukai Wo, Jizhong Yang, Nikolay Dyaur
International Meeting for Applied Geoscience and Energy (IMAGE)
... a physical experiment featuring a geological unit consisting of the salt body overlaid by the UHVL. Strong S-mode conversion at the top of the UHVL is observed...
2022
Compositional Simulation of Condensate Banking Coupled with Reservoir Geomechanics
H. Deng, Z. Chen, C. Dong, M.H. Nikpoor
Unconventional Resources Technology Conference (URTEC)
... to ensure that structured and unstructured grids are both handed in FATS. Construction of Jacobian matrixes and the residual vector is accomplished...
2013
Q-LSRTM using viscoacoustic VTI wave equation based on the nearly constant Q model
Zhang Shan-Shan, Gu Bing-Luo, Li Zhen-Chun
International Meeting for Applied Geoscience and Energy (IMAGE)
... are the Thomsen (1986) anisotropy parameters, k and n = = ( nx ,nz ) denotes the phase direction unit |k | vector. ( ) Combining the pure qP-wave...
2022
Regional variability of Caney Shale elemental composition, mineralogy, and petrophysical properties: Ardmore Basin, Oklahoma
Brittany V. Stroud, Abbas Seyedolali, Matthew J. Pranter
International Meeting for Applied Geoscience and Energy (IMAGE)
... program. Unit correction from KeV to ppm was conducted using a mudrock standard conversion process. Figure 2: Thin-section photomicrographs...
2022
Analytic directional derivative based gradient structure-tensor-based dip to detect seismic faults
Gagandeep Singh, Rahul Mahadik, William K. Mohanty, Aurobinda Routray
International Meeting for Applied Geoscience and Energy (IMAGE)
... estimates. And the term g = [g1 , g2 , g3 ]T is the image gradient vector with first deriatives computed at the image sample x in the time (g1 ), inline (g2...
2022
Seismic inversion with dictionary learning using unsupervised machine learning
Debajeet Barman, Mrinal K. Sen
International Meeting for Applied Geoscience and Energy (IMAGE)
..., and it is invariant to the diagonal rescaling function of the gradient vector. In this unsupervised waveform inversion problem, the model update is also...
2022
Ground Surface Monitoring for CO2 Injection and Storage
Saeed Salimzadeh, Dane Kasperczyk, Zuorong Chen, Abbas Movassagh, Elaheh Arjomand, Wen Shen (Vincent) Mow, James Kear
Australian Petroleum Production & Exploration Association (APPEA) Journal
... element geomechanical simulator (Matthäi et al. 2001; Salimzadeh et al. 2018, 2020; Paluszny et al. 2020), and synthetic tilt vector data have been...
2022
Shaping regularization by fast explicit diffusion
Sergey Fomel
International Meeting for Applied Geoscience and Energy (IMAGE)
...? Note that the roots of the box filter BN (Z) are distributed along the unit circle in the complex plane: N−1 1 − ZN = n=0 1− Z Zn , (3) Second...
2022
High-resolution imaging using Gaussian beam point-spread-function deconvolution
Jidong Yang, Jianping Huang, Hejun Zhu, George McMechan
International Meeting for Applied Geoscience and Energy (IMAGE)
... , × where h is the subsurface offset vector, and dps (xr ; x; xs , t) is the data generated from a point scatterer at x and has the following expression...
2023
A Noninvasive Approach for Quantitative Evaluation of Geological Deformations and Dynamic Disasters in Complex Mining Environments
Majid Khan, Xueqiu He, Dazhao Song
International Meeting for Applied Geoscience and Energy (IMAGE)
... as the stress difference, n j represents unit vector perpendicular to most dangerous dynamic disaster and frequently occurring the fracture plane...
2023
Exploiting non-uniqueness: Improving inversion results by post-processing
James Brewster
International Meeting for Applied Geoscience and Energy (IMAGE)
...). For the special case of a spherically symmetric distribution of mass enclosed by a sphere, the gravity vector due to the enclosed mass is normal...
2023
Integrating geophysical monitoring data into multiphase fluid flow reservoir simulation
Trevor P. Irons, Brian J.O.L. McPherson, Nathan Moodie, Rich Krahenbuhl, Yaoguo Li
Petroleum Exploration Society of Australia (PESA)
... upon the previous coupled modelling efforts. Figure 3- Vector glyph plot of imaginary component of the electrical field in a CWC-CSEM survey...
2018
Upper Cretaceous Shannon Sandstone: An Offshore, Shallow-Marine Sand Body
Darwin R. Spearing
Wyoming Geological Association
... of two similar sand sequences separated by a silty shale unit (fig. 8). However, in the subsurface in other areas the Shannon interval within the Cody...
1976
Enhanced Wellbore Placement Accuracy Using Geomagnetic In-Field Referencing and Multi-Station Correction
Stefan Maus, Matthew Herzl, Shawn DeVerse
Unconventional Resources Technology Conference (URTEC)
... an MWD survey by comparing those values against the expected unit vectors of the gravitational and magnetic reference fields. When these residual...
2015
Dynamic Geology of the Modern Coastal Region, Northwest Gulf of Mexico
E. Alan Lohse
Special Publications of SEPM
.... Monthly winds computed from vector analyses of the surface-wind direction, velocity and duration are shown in figure 4.2 These predominant winds represent...
1955
First Approximation to Stress Magnitude and Potential Energy Across a Convergent Plate Boundary—Ouachita-Marathon Structural Belt
Robert G. Font
West Texas Geological Society
... of the convergent boundary. The weight of a column of lithosphere of unit cross section, average density of 3 gm cm-3 (remember that the lithosphere...
1985
Transfer learning for cement evaluation: An image classification approach using VDL time series
Amirhossein Abdollahian, Hua Wang
International Meeting for Applied Geoscience and Energy (IMAGE)
... of the interpretation task. A resampling-based workflow tested various ML models, with the Support Vector Machine (SVM) model excelling by achieving over 99...
2024