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The AAPG/Datapages Combined Publications Database
Showing 47,090 Results. Searched 200,693 documents.
Subaqueous Sand-Flow Cross Strata
Ralph E. Hunter
Journal of Sedimentary Research (SEPM)
... are less common on subaqueous slipfaces, probably because avalanching tends to be more nearly continuous there than on eolian slipfaces. Another difference...
1985
Recognition of Ancient Eolian Longitudinal Dunes: A Case Study in Upper Bhander Sandstone, Son Valley, India
Pradip K. Bose, Snehasis Chakrabarty, Subir Sarkar
Journal of Sedimentary Research (SEPM)
..., Subir Sarkar 1999 Vol. 69 (1999), No. 1. (January), Straight-crested and internally bipolar cross-stratified eolian dunes are common in the upper part...
1999
Heavy Minerals of the Pleistocene Beds of the Don Valley, Toronto, Ontario
D. R. Derry
Journal of Sedimentary Research (SEPM)
..., and pyroxenes are relatively common. The higher part of the 80 feet of varved clay contains fewer coarse grains and a higher percentage of magnetite...
1933
Considerations in Azimuthal Processing and Velocity Inversion for Unconventional Plays
Michael J. Perz, William Keller, Victor Kriechbaum
Unconventional Resources Technology Conference (URTEC)
... both the azimuthvariant time-shifts which form the input to the VVAZ inversion, as well as the maximum incident angle restricting the contribution...
2018
Scaling for Wettability Alteration Induced by Addition of Surfactants in Completion Fluids: Surfactant Selection for Optimum Performance
Fan Zhang, I Wayan Rakananda Saputra, Imad Adel, David S. Schechter
Unconventional Resources Technology Conference (URTEC)
... for spontaneous imbibition process. Contact angle (CA) and interfacial tension (IFT) are essential terms in the Young-Laplace capillary pressure equation as well...
2018
Reflection waveform inversion regularized with structural constraints and scattered data interpolation
Chengliang Wu, Huazhong Wang, Bo Feng, Ting Lei, Rongwei Xu, Shen Sheng
International Meeting for Applied Geoscience and Energy (IMAGE)
... of the reflection angle and is limited to the vicinity of the reflection interface, resulting in reduced structural filtering capabilities when moving away...
2023
Upside down Rayleigh-Marchenko imaging: an application to the Volve ocean-bottom cable data
Ning Wang, Matteo Ravasi
International Meeting for Applied Geoscience and Energy (IMAGE)
... images and angle gathers are compared to those obtained by multi-dimensional deconvolution of the UD-RM up/down decomposed Green’s functions. Our...
2024
Quantifying Crack Properties of Source Rocks from Elastic Stress Sensitivity
Jihui Ding, Anthony C. Clark, Tiziana Vanorio, Adam D. Jew, John R. Bargar
Unconventional Resources Technology Conference (URTEC)
...-to-tangential compliance ratio and maximum dip angle relative to bedding. Our modeling results confirm that the compliance ratio is sensitive to fluid...
2021
New Joint Categorical/Continuous Simultaneous Inversion Technology (Paper C9)
M. Kemper
Geological Society of Malaysia (GSM)
... that in this paper, it is assumed that the seismic to be inverted is a suite of true amplitude partial angle stacks with calibrated wavelets...
2012
Deformed displacive halite crystals: Diagenetic or tectonic origin?
Christoph Leitner, Robert Marschallinger, Konstantin Huber
Journal of Sedimentary Research (SEPM)
.... The maximum angle found was 33°. Deformation of euhedral halite crystals embedded in mudstone is a common phenomenon and must be expected in all mudstone–halite...
2021
Detrital Minerals Derived from Recent Volcanics in Northwestern Chihuahua, Mexico
Raymond Sidwell, Charles A. Renfroe
Journal of Sedimentary Research (SEPM)
... of interspace filling. Albite twins of andesine with an extinction angle averaging about 18° are very common. Andesine is usually found in sub-euhedral...
1943
Efficiency improvements in structural geology modelling through the implementation of computational visual workflows
Fiona McLean, Cathal Reilly, Jacob Shearer
International Meeting for Applied Geoscience and Energy (IMAGE)
... and based on results – giving consistent, repeatable results to assessments such as “best fit”. Visual workflows allow users to automate common processes...
2022
Folds and Folding: Part II
Rasoul Sorkhabi
GEO ExPro Magazine
...); broad (0.25 to <0.63); equant (0.5 to 2.0); short (1.50 to <4); and tall (4 to <10). Tightness of a fold is measured by its interlimb angle (the angle...
2013
Coherent attribute enhanced fault recognition method based on histogram homogenization
Qing Zhou, Rui Wu, Chengcheng Xu, Yong Chen
International Meeting for Applied Geoscience and Energy (IMAGE)
... changes greatly and the signal-to-noise ratio of seismic data is low. The common fault identification method is mainly coherent attribute...
2024
Subsurface Interpretation of Golden Fault at Soda Lakes, Jefferson County, Colorado: GEOLOGICAL NOTES
Robert R. Berg
AAPG Bulletin
... for a distance of about 10 miles. The Golden fault was interpreted originally as a high-angle reverse fault and later as a low-angle thrust. However, fault...
1962
Abstract: Physical Modeling for Azimuthal AVO Over a Simulated Fractured Medium; #90174 (2014)
Faranak Mahmoudian, Gary F. Margrave, and Joe Wong
Search and Discovery.com
... are as described by Wong et al. (2009). Nine common midpoint (CMP) gathers for the azimuths 0⁰, 14⁰, 27⁰, 37⁰, 45⁰, 53⁰, 63⁰, 76⁰, and 90⁰ were...
2014
Abstract: AVAZ and VVAZ Practical Analysis to Estimate Anisotropic Properties; #90224 (2015)
Yexin Liu
Search and Discovery.com
... orthorhombic anisotropy is common and can be described by an orthorhombic velocity model or seismic amplitude approximating formula with Vertical Transverse...
2015
Joint Anisotropic Parameter Inversion Based on Nonhyperbolic Moveout and Azimuthal Amplitude Variance
Fangyu Li, Jie Qi, Bin Lyu, Kurt J. Marfurt
Unconventional Resources Technology Conference (URTEC)
... characterization. Commonly, seismic Anisotropy can be defined as the dependence of velocity on direction or upon angle (Thomsen, 2002). There are two...
2016
Tidal Structures in the Glauconitic Sandstone, Countess Field, Southern Alberta, Canada
Indranil Banerjee
CSPG Special Publications
... foresets. The dominance of high-angle cross beds also indicates deposition by unidirectional currents. A wide-mouthed, mesotidal estuary filled...
1989
A Field Guide to Portions of the Jurassic Fernie-Kootenay Trans-Canada Highway Section, Banff, Alberta: New Sedimentological and Structural Observations and Interpretations: DISCUSSION
A.P. Hamblin, R.G. Walker
CSPG Bulletin
... (sets to a maximum of about 20 cm) angle-of-repose trough cross bedding and planar-tabular cross bedding are common, and swaley cross-stratification...
2000
Evolution of Thought on Structure of Middle and Southern Appalachians
John Rodgers
AAPG Bulletin
... of the low-angle, large-displacement thrust faults of the southern Appalachians and attempted to explain the mechanics of Appalachian structure. In recent...
1949
Integrated Hydraulic Fracture Modeling Using Field Fiber-Optic Data from Zipper Fracs
Lili Xu, Jiehao Wang, Ruiting Wu, Jean-Philippe Junca-Laplace, Joe Dunn, Alejandro Lerza, Brian Velardo
Unconventional Resources Technology Conference (URTEC)
..., was conducted to explore the impact of various factors—such as well spacing, intersection angle, and hydraulic fracture geometry—on the strain-rate pattern...
2025
Numerical Simulation of Inter-Well Fracturing Interference and Fault Reactivation in Layered Shale Based on Discrete Lattice Method
Zhuo Zhang, Jizhou Tang, Yu Fan, Wenya Jiang, Junlun Li, Jian Yang, Fengshou Zhang, Fei Liu, Jian Xu, Gang Hui, Shengnan Chen
Unconventional Resources Technology Conference (URTEC)
... microseismic (MS) monitoring data. The study further examines the effects of well parameters (spacing, inclination angle), shale lithologies (felsic, mixed...
2025
The Galveston Barrier Island and Environs: A Model for Predicting Reservoir Occurrence and Trend
H. A. Bernard , C. F. Major, Jr. , B. S. Parrott
GCAGS Transactions
... ridges. "Tidal guts" on the lagoonward side of the island are swales between the recurved spit-like beach ridges. These trend at an approximate angle...
1959
The Galveston Barrier Island and Environs: A Model for Predicting Reservoir Occurrence and Trend
H. A. Bernard, C. F. Major Jr., B. S. Parrott
Wyoming Geological Association
..., and very low angle cross-bedding, are the most common depositional features of the backshore, beach crest, and foreshore sands. The initial attitude...
1961