Finite Difference Modelling: Part IV

Lasse Amundsen, Ørjan Pedersen, Martin Landrø

GEO ExPro Magazine

... modelling, of which geometric ray modelling and FD modelling are ‘end members’. Ray theory is based on the fact that wave energy in the form of rays...

Diffraction and Refraction on Reflection Seismograph Records as Aids to Fault Interpretation

Miller Quarles, Jr.

GCAGS Transactions

... OF DIFFRACTION THEORY A brief explanation of the effects of diffraction can be made with a wave front diagram. Figure 1 (left) shows returning wave...

II. Information Content and Resolution Potential of Seismic Data.

Norman S. Neidell

AAPG Special Volumes

... requires that we first adopt a wave theory viewpoint toward the propagation of a seismic disturbance. Let us first resolve a paradox which appears...

The Limitations of Seismic Modelling of Geological Structures

B. L. N. Kennett

Petroleum Exploration Society of Australia (PESA)

.... As a result we are working in a frequency range which is rather poorly served by current mathematical techniques for modelling wave propagation...

High Resolution Diffraction Imaging of Small Scale Fractures in Shale and Carbonate Reservoirs

Alexander M. Popovici, Ioan Sturzu, Tijmen J. Moser

Unconventional Resources Technology Conference (URTEC)

... of the wave propagation directions. An important point to note is that a true diffraction image is not optimally obtained by post-processing...

Forward Modeling of Seismic Data: Part 7. Geophysical Methods

George Mellman, Paul A. Kunzinger

AAPG Special Volumes

..., again with approximations, but with significant time savings. There are two classes of seismic modeling: ray tracing and wave equation methods...

Seismic Modelling in 3D for Migration Testing

Search and Discovery.com

... function. Thus we explicitly decouple the reflectivity from the velocity of wave propagation, essentially invoking the first-order Born assumption...

Fracture Detection Through MultiFocusing Diffraction Imaging, Case Studies

Marianne Rauch-Davies, Danil Pelman, Kostya Deev

Unconventional Resources Technology Conference (URTEC)

... of MultiFocusing diffraction imaging. Figure 1: MultiFocusing ray diagram for diffracted wave extraction The practical implementation of diffraction stacking...

Using Multi-Focusing 3-D Diffraction Imaging to Predict Fracture Swarms in Unconventional Reservoirs

Marianne Rauch-Davies, Alex Berkovitch, Kostya Deev

Unconventional Resources Technology Conference (URTEC)

... of the diffracted events and attenuation of the specular reflections allows creating an image that contains mostly diffraction energy. We briefly describe the theory...

Unconventional Reservoir Characterization Using Azimuthal Seismic Diffraction Imaging

Dmitrii Merzlikin, Sergey Fomel, Xinming Wu, Mason Phillips

Unconventional Resources Technology Conference (URTEC)

... of any part of this paper without the written consent of URTeC is prohibited. Summary We propose azimuthal plane-wave destruction seismic diffraction...

Stratigraphic and Structural Interpretations Using Diffraction Seismograms

Richard K. Snavely , A.K.M. Sarwar

GCAGS Transactions

... phenomena of wave propagation in the context of the wave equation. His solution explains the phase and obliquity problems encountered in Huygens' principle...

Application of finite difference eikonal solver for traveltime computation in forward modeling and migration

Amir Mustaqim Majdi, Seyed Yaser Moussavi Alashloo, Nik Nur Anis Amalina Nik Mohd Hassan, Abdul Rahim Md Arshad, Abdul Halim Abdul Latiff

Geological Society of Malaysia (GSM)

... for complex subsurface. Instead of calculating wave propagation locally as in ray tracing, finite difference offers to solve the eikonal equation over...

The Developing Role of Analysis in the Design of Floating Production Systems

D. B. Melver, D. Cash

Indonesian Petroleum Association

... 3777. Mac Camy, R.C. and Fuchs, R.A., 1954, Wave forces on piles - a diffraction theory: Technical Memorandum 69, Beach Erosion Board, U.S. Army Corps...

Abstract: Using-MultiFocusing 3D Diffraction Imaging to Predict Fracture Corridors/swarms in the Bazhenov Formation; #90187 (2014)

Marianne Rauch-Davies, Alex Berkovitch, Danil Pelman, and Kostya Deev

Search and Discovery.com

...  0  (X  ) 2  Rcre VO (6) Figure 1: MultiFocusing ray diagram for diffracted wave detection. As it follows from equation (6), diffraction...

An Explanation of the Logarithmic Spiral Plan Shape of Headland-Bay Beaches

Paul H. Leblond

Journal of Sedimentary Research (SEPM)

... of such beaches. Basic ideas on longshore currents and wave refraction and diffraction are cast into simple analytical expressions and combined with an empirical...

Abstracts: Application of CSP Gather Modeling for Determination of Velocity Smoothing Operator for Prestack Kirchhoff Depth Migration; #90173 (2015)

Hassan Khaniani and John C. Bancroft

Search and Discovery.com

... structures, prediction of diffraction traveltime curves is a challenging problem that can be approximated by ray tracing methods. One of the concerns...

Seismic diffraction imaging for improved coal structure detection in complex geological environments

Binzhong Zhou, Weijia Sun

Petroleum Exploration Society of Australia (PESA)

.... According to seismic wave theory, in addition to reflections commonly used in seismic surveying for structural delineation, there are diffractions...

X-Ray Diffraction Techniques Applicable to Studies of Diagenesis and Low Rank Metamorphism in Humic Sediments

George M. Griffin

Journal of Sedimentary Research (SEPM)

...X-Ray Diffraction Techniques Applicable to Studies of Diagenesis and Low Rank Metamorphism in Humic Sediments George M. Griffin 1967 Vol. 37 No. 4...

The Wave Equation Applied to Migration

D. Loewenthal, L. Lu, R. Roberson, J. Sherwood

Southeast Asia Petroleum Exploration Society (SEAPEX)

... is the corresponding seismic record section. The latter was derived from the earth cross-section by means of hand calculations using ray theory. The computer inputs...

Abstract: The Effects of Fluid Viscosity on Seismic Response: A Model Study; #90171 (2013)

Fereidoon Vasheghani, Larry Lines, and Joan Embleton

Search and Discovery.com

... of propagation of stress waves in the medium for elastic porous frame filled with viscous fluid. Therefore in this theory, losses caused by solid framework...

Clay Minerals of Laramie Formation, Golden, Colorado, Identified by X-ray Diffraction

Arthur James Gude, rd

AAPG Bulletin

...) (Barton and Jones, 1948) are methods which have been experimentally successful. X-RAY DIFFRACTION THEORY X-ray diffraction theory is elaborate...

POCS Method for Seismic Data Reconstruction of Irregularly Sampled Data

Elwyn J. Galloway

Search and Discovery.com

...-limiting operators (velocity filters). The incorporation of physical projections that are consistent with wave propagation theory leads to an improvement...

POCS Method for Seismic Data Reconstruction of Irregularly Sampled Data

Elwyn J. Galloway

Search and Discovery.com

...-limiting operators (velocity filters). The incorporation of physical projections that are consistent with wave propagation theory leads to an improvement...

Diffraction amplitudes as a quantitative fracture property interpretation tool

Donald C. Adams, César Barajas-Olalde, Nourelhouda Benouadah, Trevor L. Richards, Bethany A. Kurz

International Meeting for Applied Geoscience and Energy (IMAGE)

... is present over the horizontal contact in both models. In Case 87, the edge diffraction interacts with the horizontal contact to produce a guided wave...

A Comparison of Air Photograph and Computer Simulated Wave Refraction Patterns in the Nearshore Area, Richibucto, Canada and Jervis Bay, Australia

Edward A. Bryant

Atlantic Geology

... such diagrams, and McCann and Bryant (1973) related areas of erosion between 1894 and 1964 for the barrier islands of Kouchibouguac Bay to wave ray...