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The AAPG/Datapages Combined Publications Database

Showing 164 Results. Searched 195,502 documents.

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Finite Difference Modelling: Part IV

Lasse Amundsen, Ørjan Pedersen, Martin Landrø

GEO ExPro Magazine

... interpretation. The exact acoustic velocity at which the wave moves from one point to another depends on the physical properties of the medium. For constant...

2019

II. Information Content and Resolution Potential of Seismic Data.

Norman S. Neidell

AAPG Special Volumes

... In the preceding figure we see that in time the propagation wavefront will strike the entire boundary and not just a single point. According to Huygen's...

1979

Getting Something for Nothing: Noise Attenuation in an Aliased World; #41291 (2014)

David C. Henley

Search and Discovery.com

... for improving coherent noise attenuation of a single aliased noise is de-aliasing by application of constant-velocity linear moveout (LMO) prior to estimating...

2014

Acoustic modelling with elastic AVA effects

Robin P. Fletcher, James Hobro, James Rickett

International Meeting for Applied Geoscience and Energy (IMAGE)

... acoustic FWI to build the pressure wave velocity model using diving wave long offset data and then fix the propagation velocity, restrict the offsets...

2023

ABSTRACT: Optimising Seismic Acquisition Through Combined Ray Tracing and Structural Modelling; #90007 (2002)

Stuart C. Bland, Michael C. A. Goodwin

Search and Discovery.com

... are recorded and the optimum survey orientation is chosen. In compressional tectonic settings where wavefront distortion typically occurs at layer...

2002

Geothermal exploration at Kijiyama KJ-5 hot geothermal borehole in Northeastern Japan using DTS and DAS

Junzo Kasahara, Yoko Hasada, Masaru Suzuki, Tomohiro Takahashi, Hitoshi Mikada, Hiroshi Ohnuma, Yoshihiro Fujise

International Meeting for Applied Geoscience and Energy (IMAGE)

... is parallel to the S wavefront, i.e., perpendicular to their propagation direction, the S wave velocity may be slower, and Vp/Vs may exceed 1.75 if fluid...

2023

Beam Migration for Imaging of Complex Structures

Karl Schleicher, John Sherwood, Lynn Comeaux, Mazin Farouki

Indonesian Petroleum Association

... and its associated migration properties enables a very limited wavefront Kirchhoff migration contribution to a 3D migrated depth volume (x,y,z...

2009

VSP: Lessons from Numerical Simulation

M. Suprajitno, S. A. Greenhalgh

Indonesian Petroleum Association

.... The upgoing waves (reflections) are characterised by a negative apparent velocity i.e. time increases with decreasing depth. Note how the upgoing primary...

1985

ABSTRACT: Multiple suppression by the CRS technique; #90051 (2006)

Juergen Pruessmann, Martin Tygel, Fernando Gamboa, Radu Coman

Search and Discovery.com

... from a subsurface model, or from seismic data attributes. Such information is required in the case of land data, where high -velocity rocks may...

Unknown

Improve Kirchhoff depth imaging using full-wave-equation traveltimes

Yongzhong Wang, Yang He, Alex Yeh, Faqi Liu, Bin Wang, Carlos Caldern

International Meeting for Applied Geoscience and Energy (IMAGE)

... Full waveform inversion (FWI) has become the main workhorse to derive highly accurate velocity models and is applied in nearly every depth imaging...

2023

Permafrost Studies in the Norman Wells Region, Northwest Territories

P. J. Kurfurst, R. M. Isaacs, J. A. Hunter, W. J. Scott

CSPG Special Publications

... for constructing uphole wavefront diagrams. Since a frozen active layer with a high velocity overlying unfrozen material with a low velocity constitutes...

1973

Stratigraphic and Structural Interpretations Using Diffraction Seismograms

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

GCAGS Transactions

...). The model extends from the surface to a depth of 8000 ft and includes twenty horizons. The velocity values above the first horizon are based on only one...

1988

Integrated 3D Seismic Data Modeling and Processing Methodology for Structural Model Analysis: Case Study

T. Salinas

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... (PSDM) that requires perform a careful interpretation in depth as the seismic velocity behavior is modeled. The availability of this structural...

2006

Constraints on Eolian Grain Flow Dynamics Through Laboratory Experiments on Sand Slopes

Richard R. McDonald , Robert S. Anderson

Journal of Sedimentary Research (SEPM)

..., and then steadily decreased to  10 cm/s towards the tail of the flow. The longitudinal velocity gradients created considerable longitudinal strain rates...

1996

Common Reflection Surface (CRS) Stack: Limitations and Opportunities for High-Resolution Seismic Imaging; Real Data Cases

M. S. Jaya, E. A. Sentani, Yendri, Widjonarko, D. Santoso

Indonesian Petroleum Association

... wavefield attribute sections that are useful in further processing such as tomographic velocity model inversion and depth migration processing...

2007

N/A

Abstract: Seismic Data Reconstruction Using the Nonlinear Beamforming Framework; #91204 (2023)

Yimin Sun and Quentin Hirsch

Search and Discovery.com

... of them. Every missing data point in the spatial dimension on a wavefront is reconstructed via a weighted summation of a linear interpolation...

2023

Know Before You Go!

Lars Zühlsdorff, Trond Haugland

GEO ExPro Magazine

... as determined from seismic velocity analysis, well logs, check shots, or even best guesses. On the modeling side, a technique called wavefront construction...

2021

Novel Land and Marine Solutions Including Time-Lapse Using High Resolution Multi-Transient EM

Folke Engelmark

Indonesian Petroleum Association

... sampling in relation to target depth, and to achieve the necessary S/N at target levela in the shortest possible time given a particular source...

2008

2.3 Detached Sediments in Extensional Provinces: 2.3.2 Salt Tectonics: Salt Diapirs--East Texas Basin

M. Engleman and D. A. Kemmer

AAPG Special Volumes

.... Depth-converted sections are constructed utilizing velocity surveys that measure the travel-time of a seismic wavefront to depth-selected checkshots...

1983

Inferring Stratigraphy from Seismic Data

R. E. Sheriff

AAPG Bulletin

... decreases with depth, and hence resolution deteriorates with depth. At 10,000-15,000-ft (3,000-4,500 m) depth, velocity may be in the 12,000-20,000 ft/sec...

1976

Abstract: Simplified Processing of Converted Wave Data; #90224 (2015)

John C. Bancroft and Thais Guirigay

Search and Discovery.com

... with the synthetic seismograms. 4000 Velocity (m/s) 3500 Vs-int-Log(z) Vs-int-Estimated(z) 3000 2500 2000 1500 1000 500 0 1000 2000 3000 4000 Depth (m) 5000...

2015

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