Joints, tensile strength and preferred fracture orientation in sandstones. New Brunswick and Prince Edward Island, Canada

E.Z. Lajtai, P. Stringer

Atlantic Geology

... a preferred fracture orientation which corre- Fig. 2 - Histograms of joint strike fre­ quency showing joint sets , and , in two orthogonal joint...

Abstract: Joint network distribution and significance in the Variscan series of the northern margin of the Zag Basin (Anti-Atlas, Morocco); #90137 (2011)

Hassan OUANAIMI and Jean-Pierre PETIT

Search and Discovery.com

... attitude (O1/O2) to previous ones. Most of folds contain at least two sets of orthogonal joints: A/T and O1/O2 with frequent (typical) mutual...

Estimating fracture trace intensity, density, and mean length using circular scan lines and windows

M. B. Rohrbaugh Jr., W. M. Dunne, M. Mauldon

AAPG Bulletin

... and length bias when sampling fracture traces. (A) Fracture pattern with two sets sampled by three progressively larger circles (dots = trace centers...

ABSTRACT: Natural Fracture Plays in an Early Palaeozoic Frontier (Eastern Warburton) Basin, South Australia, by Xiaowen Sun; #90913(2000).

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Aeromagnetic Lineament Study of the Highland Valley Area, British Columbia

David A. Smith

Utah Geological Association

... are distributed directionally as a pronounced NS-EW pairset and two sub-sets. The sub-sets may be interpreted as two orthogonal pairsets (the preferred...

Two-dimensional simulation of controls of fracture parameters on fracture connectivity

Kajari Ghosh, Shankar Mitra

AAPG Bulletin

... and a second set of cross fractures. (c) Two orthogonal set of fractures where both sets have similar characteristics.The results of the simulations are compared...

Joint and Fracture Patterns in Basement and Sedimentary Rocks in the Sudetes Mountains

Tomasz Jerzykiewicz, Michal Mierzejewski, Andrzej Zelazniewicz

Utah Geological Association

... was developed, and the planes belonging to the two complementary sets cut each other along approximately the lines (vector σ2) steadily steepened...

Abstract: The Colorado River Extensional Corridor: An Analog for the Early Stages of Passive Margin Formation, by K. K. Beratan and J. E. Nielson; #91009 (1991)

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Late Cretaceous Chemical Remagnetization of the Paleozoic Carbonates from the Undeformed Foreland of the Western Canadian Cordillera

Philippe Robion, Jean Luc Faure, Rudy Swennen

AAPG Special Volumes

... constrains us to gather samples from different sites in two sets for reconstructing the paleomagnetic pole position. Therefore, a mean latitude...

Use of the RTAPK Core Analysis Method to Evaluate the Impact of Matrix Heterogeneity on Flow-Regime Signatures and Permeability Estimation

Niloufar Rahimof, Mohammadebrahim Shabani, Amin Ghanizadeh, Chengyao Song, Christopher R. Clarkson

Unconventional Resources Technology Conference (URTEC)

... heterogeneity is inferred. URTeC: 4024058 2 To evaluate the effect of permeability heterogeneity orthogonal to flow, two sets of nanoporous ceramic...

Regional Fracture Analysis in Western Valley and Ridge and Adjoining Plateau, West Virginia and Maryland: ABSTRACT

S. L. Dean, M. Baranoski, L. Bertoli, G. Kribbs, T. Stephens, B. Kulander, D. Lockman, D. Mumpower

AAPG Bulletin

... are pervasive throughout the entire region. Most commonly only two, or at the most three, joint sets are present at the scale of the individual outcrop...

Chapter 13. Curvilinears: Curvilinear Features Visible on Small Scale Imagery as Indicators of Geologic Structures

Rex M. Peterson

Utah Geological Association

... with dozens of sets of circles that overlap and these are intersected by various other arcs (as in Figs. 1 and 2), then it is necessary to add other...

Abstract: Estimating Fracture Intensity Using Circular Scanlines, by M. B. Rohrbaugh, Jr., M. Mauldon, and W. M. Dunne; #90928 (1999).

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Giant Polygonal Desiccation Cracks in Wildhorse Flat, West Texas—Revisited

Lisa K. Goetz

West Texas Geological Society

... be divided into a northern group and a southern group of fractures. Both groups are bounded and controlled on the east and on the west by two much better...

Chapter 4. Great Plains & Central United States: Bedrock Jointing on the Alberta Plains

Elkanah A. Babcock

Utah Geological Association

... unit of jointing is an orthogonal system consisting of two sets of extension fractures. Two or more orthogonal systems may be present at a given...

Fractured reservoirs in the Eastern Foothills, Colombia, and their relationship with fold kinematics

Javier Tamara, Andrés Mora, Wilmer Robles, Andreas Kammer, Alberto Ortiz, Nelson Sanchez-Villar, Alejandro Piraquive, Luz Helena Rueda, Wilson Casallas, Jaime Castellanos, Jorge Montaña, Luis Guillermo Parra, Jaime Corredor, Ángela Ramirez, and Enus Zambrano

AAPG Bulletin

... of fracture sets as arrows and fracture intensity as colored circles. Maps for each fracture system are shown separately, (A) northeast–southwest set, (B...

Novel 3-D Field-scale Characterization of Reservoir Fractures Using Surface Seismic Data by the Double-Beam Method and Field Applications

Yingcai Zheng, Hao Hu, Xinding Fang, Robert Stewart

Unconventional Resources Technology Conference (URTEC)

... with a horizontal reservoir model containing two orthogonal coexistent fracture sets (Zheng et al., 2013). In this paper, we will show another...

Abstract: Fractures of a Triassic Carbonate Reservoir in Northeastern British Columbia, Canada, by T. Joubert and C. Rice; #90942 (1997).

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Lineaments and Their Tectonic Implications in Rocky Mountains and Adjacent Plains Region: ABSTRACT

Edwin K. Maughan, William J. Perry, Jr.

AAPG Bulletin

... 1349 67 8. (August) Two orthogonal sets of lineaments in Phanerozoic rocks of the Rocky Mountains and adjacent plains region probably reflect...

Lineaments and Their Tectonic Implications in Rocky Mountains and Adjacent Plains Region: ABSTRACT

Edwin K. Maughan, William J. Perry, Jr.

AAPG Bulletin

... 856 69 5. (May) Two orthogonal sets of lineaments in Phanerozoic rocks of the Rocky Mountains and adjacent plains region probably reflect recurrent...

Abstract: Fracture Connectivity Patterns of Folded Carbonates, Teton Anticline, Sawtooth Range, Montana, by Kajari Ghosh and Shankar Mitra; #90078 (2008)

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ABSTRACT: Determination of in-Situ Stress and Other Structural Elements Using Sonic Cross-Dipole Waveforms and Image Logs, by Adrian Manescu and Peter Bright; #90913(2000).

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Abstract: Weakly Supervised Structural Interpretation Using Projection Matrices for Latent Space Factorization;

Oluwaseun Joseph Aribido, Ghassan AlRegib

Search and Discovery.com

... space of the model into two orthogonal subspaces using projection matrices. The projection matrices are constrained to be orthogonal and additive. We...

Pebble Shape (and Size!): REPLY

Werner K. Illenberger

Journal of Sedimentary Research (SEPM)

... investigation hereof is warrante but is beyond the scope of this discussion. If there is only spurious correlation between two orthogonal variables, then I...

Elk Hills Monterey Formation - Challenge of Incorporating Complex Natural Fractures to Improve Production Understanding

Robert Gales, Rad Sobczyk, Nicholas Harvey

Unconventional Resources Technology Conference (URTEC)

... of the stereonet was considered to be bedding orthogonal. These clusters were removed from the data set. To produce the fracture sets the construction of Polar...