Active Source Sparse Imaging Using Permanent SADAR Arrays

Derek Quigley, Paul A. Nyffenegger, Kevin D. Hutchenson, Jonathan Yelton

Carbon Capture, Utilization and Storage (CCUS)

... demonstrates the ability to address aliasing of steeply dipping surface wave arrivals by reorganizing the data to improve the lateral spatial sampling...

Shipboard Processing and Interpretation

D.M. Angstadt

Geological Society of Malaysia (GSM)

... sections at this point contained a fSir' amount of linear aliasing noise commonly generated in this area when the shot spacing is double the group...

Beam Migration for Imaging of Complex Structures

Karl Schleicher, John Sherwood, Lynn Comeaux, Mazin Farouki

Indonesian Petroleum Association

... variations in the data acquisition geometry (minimized acquisition footprint). Also the individual wavelets should not exhibit any aliasing effects, even...

Broadband Seismic Technology and Beyond: PART X: IsoMetrix … Isometric Sampling

Lasse Amundsen, Martin Landrø

GEO ExPro Magazine

... of the limitations is the effect called aliasing. Once more, we step back to basics. An example of aliasing can be seen when watching wagon wheels in old Westerns...

Application of Robust Noise Reduction on a Land 3D Seismic Data

Agus Abdullah, Jesse Shaw

Indonesian Petroleum Association

... is due to aliasing. This aliasing effect can be reduced by increasing the FFT sampling i.e. in this case we used 2048 FFT samples. Figure 7 shows...

A successful story of working with towed streamer and ocean-bottom node data on interpolation and image enhancement

Heather Yao, Amr Elsabaa, Nathaniel Cockrell, Dawit Desta, Ruoyu Gu, Christina Tapia, Nigel Hicks, Lauren Peschier

International Meeting for Applied Geoscience and Energy (IMAGE)

... as prior information, in addition we combine the migration outputs to optimize the subsurface image. Beyond aliasing interpolation with priors...

Optimization of Seismic Acquisition Design Using Ocean Bottom Nodes at 'MHS' Field

M Hanif Syamri, Ruhul Firdaus, Syamsurijal Rasimeng, Agung A. Susanto

Indonesian Petroleum Association

... cause aliasing in the tilt reflector, causing noise and probably loss of primary reflection. Whereas azimuth is the raypath direction from the source...

Basic Seismic Processing: Part 7. Geophysical Methods

Peter M. Duncan

AAPG Special Volumes

... aliasing. Aliasing is a phenomenon in which high frequency data masquerades as low frequency energy as a result of undersampling. To sample a signal properly...

Abstract: The Phase Shift Time Stepping Equation and the Marmousi Data Set; #90171 (2013)

Ben D. Wards, Gary F. Margrave, and Michael P. Lamoureux

Search and Discovery.com

.... This equation may be used recursively to compute a solution to the wave equation. The size of the timestep is limited by an aliasing condition r = D...

ONSHORE APPLICATIONS OF 3-D SEISMIC TECHNOLOGY 3D DATA ACQUISITION

Tom Davis, Steve Roche, and Susie Mastoris

Fort Worth Geological Society

... of aliasing. An example of aliased data could be steeply dipping, higher frequency data (often a desirable degree of resolution) that is aliased...

Optimised 3D Land Geophysical Survey Design - A Case Study

P. van Baaren

Papua New Guinea (PNG) Petroleum Convention Proceedings

... the sampling interval required to prevent aliasing of the steepest dipping events. However, the raw seism ic data may contain diffractions with steeper dips...

Seismic Acquisition in the Sub-Andean Belt of Bolivia

Jair R. de S. Soares Filho, Roberto D. Chaves

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... point intervals show better lateral resolution, avoiding aliasing. This analysis also indicated that the use of small charge amounts improves...

Fundamental 3-D Seismic Survey Design

Stuart Wright

Rocky Mountain Association of Geologists

.... As the dips get greater, the cells need to be smaller in order to avoid spatial aliasing. More precise relationships will be discussed later in the design...

Maximising the value of 2D hard rock seismic acquisition at Escondida Porphyry Copper Mine

Heather Schijns, Gabriel Madero

Petroleum Exploration Society of Australia (PESA)

... dips without compromising station spacing requirements for spatial aliasing, and 3) lack of historic surveys and/or petrophysical information...

Abstract: The Resolution Revolution

Andrew Long

Petroleum Exploration Society of Australia (PESA)

... data being input, free of aliasing. Figure 3 presents a migrated time slice at 0.15 s TWT. Note the almost total absence of any acquisition footprint...

The Use of Modern 3D Seismic Data Processing Techniques, 5D Interpolation, and Anisotropic PSTM to Improve Existing 3D Data in South Louisiana Data—Pulling the Scales from our Eyes; New Truth from Existing Datasets

John Asma, John Stevens, Sukhdev Hyare, Dave Spaulding

GCAGS Transactions

..., the results improve as the completeness of the input wave field increases. Aliasing and poor event continuity are some of the artifacts generated...

Three-Dimensional Seismic Method: Part 7. Geophysical Methods

Oz Yilmaz

AAPG Special Volumes

... pass of migration, the data sometimes need to be trace interpolated along the cross-line direction to avoid spatial aliasing. 3-D VERSUS 2-D...

Vertical and Lateral Seismic Resolution and Attenuation: Part 7. Geophysical Methods

R. E. Sheriff

AAPG Special Volumes

... are required by sampling theory to prevent aliasing. An aliased signal appears in the seismic record at lower frequency and/or dip than is real...

Abstract: Ground Roll Attenuation via SVD and Adaptive Subtraction; #90171 (2013)

Peter Cary and Changjun Zhang

Search and Discovery.com

... roll but they can have limited success because of irregular trace spacing and data aliasing. They also can generate artifacts due to spatial impulse...

Why 3D Seismic Missed a Giant Field in the Eastern Venezuela Thrust Belt; Postmortem of a Late Discovery

Search and Discovery.com

... direction. This caused spatial aliasing and lack of illumination in the other directions, making seismic processing and interpretation quite challenging...

Abstract: Ground Roll Attenuation via SVD and Adaptive Subtraction; #90171 (2013)

Peter Cary and Changjun Zhang

Search and Discovery.com

... roll but they can have limited success because of irregular trace spacing and data aliasing. They also can generate artifacts due to spatial impulse...

Abstract: Physical Testing of the Effect of Tilting on the Reflection Coefficient in an Anisotropic Material; #90172 (2014)

Miryam Ortiz-Osornio, Douglas R. Schmitt

Search and Discovery.com

... resolution in the frequency domain, and avoid aliasing, we record 30,000 samples with a sampling interval of 0.002 s. The experiments are carried out...

Abstract: Fourier Domain Regularization 5D and More; #90174 (2014)

V. Khatchatrian

Search and Discovery.com

.... To prevent data aliasing especially if substantial upsampling is the objective, the search area of the spectrum is truncated at the current values...

Abstract: Kirchhoff Imaging in a Matrix Form. Part I: Modelling; #90174 (2014)

Abdolnaser Yousefzadeh and John C. Bancroft

Search and Discovery.com

...) equation to calculate the modelling time for each sample in each trace. Proper weighting functions, filtering, interpolation, dip, and aliasing controls...

Essentials of Streamer Marine 3-D Surveys, by Malcolm Lansley, #40140 (2004).

Search and Discovery.com