Broadband data with a new low frequency source Acquisition and processing example from the Gulf-of-Mexico

Xuefeng Shang, Maksym Kryvohuz, Hamish Macintyre, Guido Baeten, Thibaut Allemand, Philippe Herrmann, Stephane Laroche, Shuki Ronen

International Meeting for Applied Geoscience and Energy (IMAGE)

... its business value in velocity model building. In this study, we explore the viability of broadband seismic imaging with a LF source. During a recent...

Into the Abyss!

William Wills

GEO ExPro Magazine

... velocity model around a well. Borehole Seismic for Deep Reservoirs? However, as directional drilling technology has advanced over the last decade...

High-resolution imaging in the Campos Basin using legacy seismic acquisition

David Brookes, Darrell Armentrout, Milos Cvetkovic, Terry Johnson, Trish Sullivan

International Meeting for Applied Geoscience and Energy (IMAGE)

... at variable depths, and usually small scale, are important to image well, as they are directly affecting seal integrity. Figure 1. DM FWI velocity model...

Abstract: Simple Wavefield Modelling to Evaluate the Low Frequency Artifacts in Reverse-Time Migration; #90224 (2015)

John C. Bancroft

Search and Discovery.com

...) FIG. 1 An example of a) low frequency noise contamination, and b) after a low pass filter was applied, and c) the amplitude spectrum of the filter...

TAU Migration and Velocity Analysis

Search and Discovery.com

Mitigating cycle skipping in FWI through preconditioned multidimensional optimal transport

James McLeman, Tim Burgess, Tom Rayment, Victor Chua

International Meeting for Applied Geoscience and Energy (IMAGE)

.... Unfortunately, this approach is prone to cycle skipping when the supplied velocity is too far from the truth. Starting FWI at lower frequencies...

Deep learning software accelerators for full-waveform inversion

Sergio Botelho, Souvik Mukherjee, Vinay Rao, Santi Adavani

International Meeting for Applied Geoscience and Energy (IMAGE)

... is the use of (deep) neural networks, which have proven to be capable of learning complex non-linear relationships between the velocity model...

Abstract: Removing Blended Sources Interference Using Stolt Operator; #90224 (2015)

Amr Ibrahim

Search and Discovery.com

... operator (Stolt, 1978) map the frequency ω to wavenumber kz in Fourier domain for constant velocity. The adjoint Stolt operator can be written...

Wave Equation Shot Migration as a Ground Roll Filter.

Francisco Ortigosa, Pedro Muñoz

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

...) by the magnitude The points of an arbitrary straight line (fig. 1) given by f=vakx moves to another straight line f=v’akx, whose apparent velocity, slope, is given...

Hydrocarbon exploration method based on spectral analyses of reflected seismic waves with an introduction to Class A, B and C P-wave dispersion

Robert Wiley, R. Harris Ardis, Scott W. Peters

International Meeting for Applied Geoscience and Energy (IMAGE)

... velocity causing a zero reflection coefficient notch resulting in a double peak or a bi-modal spectrum (figures 3a and 3b) is a Class B ADF® setting...

Reservoir Rocks Behaving Differently

Thomas Smith

GEO ExPro Magazine

... conventional data processing, which does not realize the existence of this wave and does not account for its lower velocity in the reservoir rocks, its...

Self-parametrizing seismic data processing modules: An example on coherent noise suppression

Simone Re, Ran Bachrach, Massimo Clementi, Collin Wilson

International Meeting for Applied Geoscience and Energy (IMAGE)

... in the frequencywavenumber (FK) domain. In the FK spectrum, the useful signal and the noise are grouped in different regions and, subsequently, they can then be partially...

Abstract: Seismic Wave Attenuation due to Scattering and Leaky Mode Mechanisms in Heterogeneous Reservoirs; #90171 (2013)

Jun-Wei Huang, Gilles Bellefleur, and Bernd Milkereit

Search and Discovery.com

... direction as propagation. Physically, the exponential decay is due to the fact that as seismic wave propagates along a high velocity zone, the wave...

The identification and cause analysis of abnormal velocity in the western part of Shaleitian Bulge

Zongyu Zhen, Gang Peng, Xuefeng Zhou, Bo Xi

International Meeting for Applied Geoscience and Energy (IMAGE)

...The identification and cause analysis of abnormal velocity in the western part of Shaleitian Bulge Zongyu Zhen, Gang Peng, Xuefeng Zhou, Bo Xi...

A Critical Review of Data Quality and Content Applied to FWS and Similar Tools

M. Wiltshire

Petroleum Exploration Society of Australia (PESA)

... velocity models. Various forms of more complex sonic logging tools and borehole seismic techniques resulted, and were quickly introduced...

Integration of Vertical Seismic, Surface Seismic, and Well-log Data at the Mallik 2L-38 Gas-hydrate Research Well, Mackenzie Delta, Canada

M. W. Lee, T. S. Collett, W. F. Agena

AAPG Special Volumes

... 600900 m (19682953 ft) are about 20% slower than the sonic-log-derived velocity, implying seismic anisotropy. The spectral ratio of downgoing waves...

3D Seismic from Planning to Mapping

A. Kullerud, O. Nipen, H. E. Nordberg

Indonesian Petroleum Association

... and velocity analyses. In 3D seismic, migration represents probably the most important part of the processing sequence as compared to conventional 2D...

Efficient interdisciplinary workflow for predrill seismic pore pressure prediction

Josue Fonseca, Anshuman Pradhan, Tapan Mukerji

International Meeting for Applied Geoscience and Energy (IMAGE)

... a velocity spectrum through scanning the unmigrated seismic data with normal moveout (NMO) procedure. Finally, we consider samples as acceptable when...

Finite-difference modeling of marine vibrator sources

Khalid Almuteri, Jeffrey Shragge, Paul Sava

International Meeting for Applied Geoscience and Energy (IMAGE)

... the ability to accurately and stably model high-velocity moving sources, and account for the wavefield distortion predicted by the Doppler theory...

Delineation of Gas Sands by Seismic Stratigraphy in the Pericocal Area, Orinoco Heavy Oil Belt, Venezuela: Section IV. Exploration Methods

J. Licheri, N. Parra

AAPG Special Volumes

... by the interfaces between the relatively low-velocity gas sands and the high-velocity lignites and shales. A model generated from the sonic log of well...

New Approach: Using Relative Inversion with Spectral Decomposition to Distinguish Thin Layers in the 33-Series Sand Reservoirs of the Widuri Field, Southeast Sumatra, Indonesia

Ratih Muliani, Reza Widiatmo, Heri Gunawan, Pranowo Nugroho, Hairunnisa, Awal Mandong, Rino Saputra

Indonesian Petroleum Association

.... Therefore, interpretation was conducted in the Time-Frequency domain because interference patterns were observed in the amplitude spectrum of the seismic...

The Generation of Scour Marks Near Obstacles

Peter D. Richardson

Journal of Sedimentary Research (SEPM)

... variables--that is to say, the transport depends not only on the range of values of fluid velocity, for example, but also upon the sequence in which...

Detecting Fracture Zones in the Austin Chalk Using Seismic P- Wave Data

Ilyas Najmuddin

Houston Geological Society Bulletin

... the following method: 1/Q= (αV)/(πF) α - attenuation coefficient; V - velocity; F - frequency; Q - qualityFor a distance X : Amplitude Spectrum(X.f) = d...

Passive Seismic Techniques, by Bob Hardage, #40319 (2008)

Search and Discovery.com

Resolving Thin Beds and Geologic Features by Spectral Inversion, by Satinder Chopra, John P. Castagna, and Yong Xu, #40326 (2008)

Search and Discovery.com