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The AAPG/Datapages Combined Publications Database
Showing 44,912 Results. Searched 200,357 documents.
Another Look at the Separation of P- and S-Waves
Jun-Wei Huang
Search and Discovery.com
...\ y w\ x · wI wI wI § w\ , and u ȥ ¨ z ¸i ¨ ¸k ¸ j ¨ wx wy wz wz ¹ © wz wx ¹ © wx wy ¹ © wy I where i, j, k are the unit vectors...
Unknown
Application of Rosin's Distribution in Size-frequency Analysis of Clastic Rocks
Laurence R. Kittleman, Jr.
Journal of Sedimentary Research (SEPM)
... in a sample larger than size x; b is an inverse parameter of size; n is a sorting coefficient numerically equal to the tangent of the slope of the curve...
1964
Reliability of Cross-stratification Types as Paleocurrent Indicators in Fluvial Rocks
Lee R. High, Jr., M. Dane Picard
Journal of Sedimentary Research (SEPM)
... deposit. Flow is from left to right. Upper sedimentation unit is capped by micro-cross-stratification and desiccation cracks. Hammer for scale. FIG. 4-b...
1974
Quantitative Analysis of Turbidites in the Upper Devonian Sonyea Group, New York
Roger G. Walker, Robert G. Sutton
Journal of Sedimentary Research (SEPM)
... proximal area, and here, the cross-lamination vector mean directions differ significantly from sole mark directions. Ocean current reworking...
1967
Robust Uncertainty Quantifications of Fracture Geometries Through Automatic History Matching with Application in Real Shale Gas
Yuchen Xiao, Chuxi Liu, Wei Yu, Kamy Sepehrnoori, Corwin Zigler
Unconventional Resources Technology Conference (URTEC)
...). The method initially samples 50 sets of parameters from user-defined mean vector and the variance-covariance matrix with zeros on the off-diagonals...
2022
Oriented Fossils as Paleocurrent Indicators in Paleozoic Lutites of Southern Appalachians
Michael L. Jones, John M. Dennison
Journal of Sedimentary Research (SEPM)
... feasibility of using fossils as paleocurrent indicators in fine lutites. Preferred orientation was detected by vector mean and Rayleigh test procedures...
1970
Application of an Inverse Method for Calculating Three-Dimensional Fault Geometries and Slip Vectors, Nun River Field, Nigeria
Hugh G. Kerr, Nicky White
AAPG Bulletin
... are set as the orthogonal unit vectors. Our result indicates that the horizontal slip vector is toward the east and that the fault has a component...
1996
Abstract: Which Curvature is Right for You? Part - 2; #90174 (2014)
Satinder Chopra and Kurt J. Marfurt
Search and Discovery.com
... search or any other available method. After defining the three components of the unit normal, n, and the rotation vector ψ, Marfurt and Rich (2010) define...
2014
Statistical Determination of Mean Strike and Dip: An Example from the Basal Tuscaloosa, Eastern Alabama
F. A. Pontigo, Jr. , W. C. Parker , W. F. Tanner
GCAGS Transactions
... the weathered state of the underlying gneiss onto the residuals reveals no pattern, suggesting that much of the alteration of this unit post-dated...
1983
Horizontal Drainhole Drilling Techniques Used in Rocky Mountain Coal Seams
Terry L. Logan
Rocky Mountain Association of Geologists
... Mesaverde unit. The coal seam is at an average depth of approximately 5,500 feet (1,676 m) and is 16 to 20 feet (4.9 to 6 m) thick. The coal...
1988
Applying Machine Learning Methods to Study Compartmentalization in Complex Reservoirs Based on Static Pressure Information; #42473 (2019)
Jose Victor Contreras
Search and Discovery.com
... involves the selection of the map that minimizes the average distance between each data vector and its best matching unit (BMU), and the topographic error...
2019
Hydrodynamic effects on low-dip stratigraphic traps
S. A. Stewart
AAPG Bulletin
... to be the same as the free water level. Reservoir is used synonymously with an aquifer and porosity unit. Reservoir and nonreservoir are taken to be a binary...
2024
Anisotropy Kinematics Clarified through Regime Rrays Model
William J. Vetter
Search and Discovery.com
..., (3) not direction-wise orthagonal to front tangent planes; (4) and, velocity or slowness magnitudes along loci directions differ from those in front...
Unknown
Anisotropy Kinematics Clarified through Regime Rrays Model
William J. Vetter
Search and Discovery.com
..., (3) not direction-wise orthagonal to front tangent planes; (4) and, velocity or slowness magnitudes along loci directions differ from those in front...
Unknown
3-D Geocellular Oil-Resource Determination in South Texas Frio Fluvial-Deltaic Reservoirs
Mark H. Holtz , Joseph Yeh , C. Y. Chang
GCAGS Transactions
... to the entire genetic unit. Directional bias was accomplished by assigning a vector of direction and magnitude. As illustrated in Figure 2, directional...
1997
Exploration Application of Temperatures Recorded on Log Headings--An Up-the-Odds Method of Hydrocarbon-Charged Porosity Prediction
Stanton M. Ball
AAPG Bulletin
... were determined exactly as for Figure 5. Mer ly counting unit distances along all vectors, without drawing in half-vector arrows, saved time...
1982
Deposition and Stratification
J. C. Harms, J. B. Southard, R. G. Walker
Special Publications of SEPM
... of transport, or a combiTemporal decrease in bed load is unimportant nation of both. because the quantity above a unit area of the bed is never very...
1982
Joint inversion of gravity and magnetic data using indicator functions
Ke Wang, Dikun Yang
International Meeting for Applied Geoscience and Energy (IMAGE)
... of gravity and magnetic has the form of 𝒅 𝒊 = 𝑨 𝒊 𝒎 𝒊, (1) where 𝒎 𝒊 is the model vector consisting of M elements corresponding...
2022
Eolian Cross-Bedding in the Beach Dune Environment, Sapelo Island, Georgia
Lynton S. Land
Journal of Sedimentary Research (SEPM)
... and separated from overlying less steeply dipping "topset" surfaces by a sharp change of slope. The vector resultant of the distribution of azimuths is 313...
1964
Microseismic imaging with three-component borehole sensors
Jakob B. U. Haldorsen
International Meeting for Applied Geoscience and Energy (IMAGE)
... a point x in space, the particle motion associated with this wavefield will be along the ray unit vector ex,x m for the ray connecting x to xm...
2022
Relating Microseismicity to Geomechanical Strain
Adam M. Baig, Ben Witten, Aaron Booterbaugh
Unconventional Resources Technology Conference (URTEC)
... of microseismic events occurring over a time Δ . Each event is described by a surface, ν , with slip vector , and unit normal vector, . We recognize the strain...
2021
Abstract: A Simplified Scheme to Classify the Surfaces and Geometries of Sequence Stratigraphy: the Accommodation Succession Method, by J. E. Neal and V. Abreu; #90090 (2009).
Search and Discovery.com
2009
ABSTRACT: Permeability Prediction and its Impact in Reservoir Modeling. Postle Field, Oklahoma; #90129 (2011)
Cucha Lopez and Thomas L. Davis
Search and Discovery.com
... and distinguished by the use of petrophysical attributes from the well logs. A multiclass classification using Support Vector Machines (SVM) was performed...
2011
Section Four: Geologic Techniques for Operations on Diapiric Structures
New Orleans Geological Society
... distance in the well between the fault and the horizon by the tangent of the fault' shade (i.e., 90° - dip angle). Use 0.7 for 55°, 0.84 for 50°, or 1.0...
1995