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The AAPG/Datapages Combined Publications Database

Showing 41,256 Results. Searched 191,921 documents.

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A brief description of the Andromeda Zn-Cu prospect in the Albany-Fraser Orogenic belt: A geophysical discovery using HT SQUID

Paul Polito, Tony Crawford, Tim Worthington, Mike Whitford, Somealy Sheppard

Petroleum Exploration Society of Australia (PESA)

... wide, Figure 1. The position of the Andromeda conductor relative to the structural ellipse and the MLEM survey stations. REGIONAL GEOLOGY The AFO...


Classification of Geological Samples by Discriminant-Function Analysis

J. E. Klovan,, G. K. Billings

CSPG Bulletin

... a contour value describing the density of items enclosed within it. The inner ellipse in the limestone group, for example, defines an area within...


Seismic Characterisation of Unconventional Plays in North America

Lee Bell, Mary Edrich, Alvaro Chaveste

Petroleum Exploration Society of Australia (PESA)

... important characteristic is 'fractu rability' or development The area l coverage and data information, and can highlight su bt le cha nges how easily...


Chapter 27: New Evidences of an Active Strike-slip Fault System in Northern Venezuela, near Offshore Perla Field

Laszlo Benkovics, Albert Asensio

AAPG Special Volumes

... of the overriding Caribbean and stable South American plates, an area characterized by a unique geologic setting. A recent three-dimensional (3-D) survey (ca 700...


Three-Dimensional Geologic Block Modeling Of The Kutcho Creek Massive Sulfide Deposit, British Columbia: Chapter 15

David E. Hamilton, Robert S. Didur

AAPG Special Volumes

... discounted based on the cell-hole orientation relative to the weighting ellipse. In this way, the directional bias noted by the geologist was incor...





... 1966; Tan 1973). These fossil-based methods compute strain ellipses, two-dimensional representations of relative changes in length in a plane, based...


Considerations in Azimuthal Processing and Velocity Inversion for Unconventional Plays

Michael J. Perz, William Keller, Victor Kriechbaum

Unconventional Resources Technology Conference (URTEC)

... implies that VVAZ inversion holds great promise for optimizing future production in the area, and moreover serves as implicit validation of the processing...


Regional and Local Fractures of the Bakken Petroleum System, Williston Basin: Integrating Field Studies and 3-D Seismic Analysis

Stephen J. Angster, J. Frederick Sarg

AAPG Special Volumes

...-lateral wrench fault strain ellipse model is offered to explain these regional trends. Fracture orientations acquired from outcrop sites (Little Rocky...


High Fidelity Directional Survey Calculations Can Improve Hydraulic Fracture Positioning In Unconventional Laterals

Bill Lesso, Tim Paton

Unconventional Resources Technology Conference (URTEC)

... the scope of this paper. For the sake of argument, a default fracture can be described as an ellipse that is 600 ft high and 800 ft wide. It is fully...


Quantitative Fabric Analysis of Drammen Clay Using X-ray Diffraction Technique

A. Kazi

Journal of Sedimentary Research (SEPM)

..., are proportional to the number of particles. Since, the relative intensity of X-ray diffraction from a given basal plane varies directly with the number...


Deformation of organic matter and its effect on pores in mud rocks

Guochang Wang

AAPG Bulletin

... principle axis; c is the half length of the minimum principle axis; , and AR is the aspect ratio of ellipse . Assuming the surface area is constant during...


Core Orientation from Non-Oriented Core: A Tutorial

D. C. Carter

Indonesian Petroleum Association

... of 3D-digitizer is used it is important that the relative orientation of the reference line is maintained during the measurement process. If several features...


Structural Geology Observations Derived From Full Tensor Gravity Gradiometry Over Rift Systems, #41784 (2016).

Desmond FitzGerald, Horst Holstein

Search and

... component analysis problem • In this example, tensor is represented by an ellipse • Tensor is easiest described by Eigenvalues and Eigenaxis • Eigenaxis...


Monitoring CO2 Injection at Weyburn Reservoir Using 3-D/3-C Seismic Datasets; #20290 (2015)

Le Gao, Igor Morozov

Search and

... of the three vintages of the dataset. Dashed green ellipse indicates the area of increased pore pressure. Figure 9. Differential attribute δP2...


Well Locations and Mapping Considerations

F. Kenneth Aitken

Houston Geological Society Bulletin

...), but most data systems store locations in terms of absolute coordinates. Within a small, localized area, relative locations might be totally adequate...


Use of the azimuthal resistivity technique for determination of regional azimuth of transmissivity

Douglas Carlson

Environmental Geosciences (DEG)

... regional-scale properties of these joint sets: azimuth of transmissivity ellipse, dominant set, and trend(s). The surface azimuthal electrical resistivity...


Improvements in Graphical Representation of Fabric Data, Showing the Influence of Aspect Ratios of Grains on Their Orientations

Atsushi Yamaji, Fujio Masuda

Journal of Sedimentary Research (SEPM)

... by the attitude of the grains relative to surrounding water current but also by the shape of the grains (Jeffery 1922; Middleton and Southard 1977, p. 4.7; Allen...


Application of the surface azimuthal electrical resistivity survey method to determine patterns of regional joint orientation in glacial tills

Douglas Carlson

Environmental Geosciences (DEG)

... array rotated about a fixed center point at selected degree intervals that yields an apparent resistivity ellipse. From this ellipse, joint set...


Rapid Estimations of Dynamic Hydraulic Fracture Fronts from Cross-Well Low-Frequency Distributed Acoustic Sensing Strain-Rate Measurements

Smith Leggett, Erich Kerr, Ding Zhu, Dan Hill

Unconventional Resources Technology Conference (URTEC)

.... The major and minor axes of the ellipse, 2a and 2b, are referred to as fracture length and height in this work. xw and yw are the lateral and vertical...


An Overview of Ray Trace Modeling with an Example from the Wichita Mountain Front in Southern Oklahoma

Jan Dodson, Roger A. Young, Kevin Smart

Oklahoma City Geological Society

... are shown by dashed lines. Figure 14. Variable area display of SEGY file for fault reflection on top. Amplitudes other than the one in the ellipse...


Using Multiazimuth Seismic Data for Anisotropy Estimation in an Unconventional Reservoir

Surabhi Mishra

Petroleum Exploration Society of Australia (PESA)

... are the key attributes that seismic can help predict. Seismic Velocity and Amplitude variations with azimuth can be used to predict fracture strike, relative...


Identifying Re-Stimulation Effectiveness by Utilizing Microseismic Attributes

M. Preiksaitis, A. Baig, S. Bowman-Young, T. Urbancic

Unconventional Resources Technology Conference (URTEC)

...rac, could indicate an area of rock with new fracture development missed during the initial completion. The center ellipse associated with two mid-late...


Three-Dimensional Shape Analysis of Fine-Grained Sediments

Alan E. Wright

Journal of Sedimentary Research (SEPM)

... of the photograph relative to the slide and calculating the glancing angle for that position, the angle being assumed constant over the area of one photograph...


Geodetic Datums and Map Projections

James G. Morgan

Houston Geological Society Bulletin

... the earth's surface, a plane would suffice for a very small area such as a few city blocks. For carrying position measurements beyond a few miles...


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