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GSH Technical Luncheon
Sponsored by TECHNICAL LUNCHEON COMMITTEE
Tuesday 9-Dec-08 11:30 AM to 1:30 PM CST
Speaker: Satinder Chopra, Manager - Reservoir Services Division
Arcis Corporation
We were unable to register you for this event as the event deadline has passed or the maximum number of seats available has been reached.
Omni Palace
12121 Westheimer Rd.
Houston Texas
77077 USA
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Phone: (281) 921-6664
Details for "GSH Technical Luncheon"
Seismic attributes for stratigraphic feature characterization
Seismic attributes are used to extract information from seismic reflection data. Such attributes can be used for both quantitative and qualitative interpretation. Some attributes such as seismic amplitude, envelope, RMS amplitude, spectral magnitude, acoustic impedance, elastic impedance, and AVO measures are directly sensitive to changes in seismic impedance. Other attributes such as peak-to-trough thickness, peak frequency, and bandwidth are sensitive to layer thicknesses. Both of these classes of attributes can be quantitatively correlated to well control using multivariate analysis, geostatistics, or neural networks. Seismic attributes such as coherence, Sobel filter edge detectors, amplitude gradients, dip-azimuth, curvature, and gray-level co-occurrence matrix texture attributes provide images that allow interpreters to qualitatively use geologic models of structural deformation, seismic stratigraphy, and seismic geomorphology to infer the presence of fractures or the likelihood of encountering sand-prone facies.
In order to extract accurate information from seismic attributes, the input seismic data must be optimally processed. The term ‘optimally’ essentially means that any distortion is minimized or removed during processing. In practice, the resulting pre-stack or poststack data will still show a certain amount of left-over “noise”. This noise might include acquisition related artifacts, processing artifacts and random noise. In this presentation we focus our attention on conditioning such data for the derivation of attributes. We also discuss some of the procedural steps for noise filtering and dip-steering options for computation of some geometric attributes like coherence and curvature. Finally in this context, we also discuss the impact the choice of algorithm can have on the final results. All these factors ensure that the seismic attributes yield more accurate information for interpretation.
Examples will be presented for the application of curvature and coherence attributes to 3D seismic volumes. These examples illustrate the use of these attributes to aid the geophysicist in making more accurate interpretations. Finally we’ll provide an update on emerging trends in attribute research and discuss the directions in which seismic attributes are headed.
 Satinder Chopra received MS and M.Phil. degrees in physics from Himachal Pradesh University, Shimla, India. He joined the Oil and Natural Gas Corporation Limited (ONGC) of India in 1984 and served there till 1997. In 1998 he joined CTC Pulsonic at Calgary, which later became Scott Pickford and Core Laboratories Reservoir Technologies. Currently, he is working as Manager, Reservoir Services at Arcis Corporation, Calgary.
In the last 24 years Satinder has worked in regular seismic processing, and interactive interpretation, but has spent more time in special processing of seismic data involving seismic attributes including coherence and textures, seismic inversion, AVO, VSP processing and frequency enhancement of seismic data. His research interests focus on techniques that are aimed at characterization of reservoirs. He has published 5 books and more than 12 dozen papers and abstracts and likes to make presentations at any beckoning opportunity. Satinder is a member of the SEG ‘The Leading Edge’ Editorial Board, the editor of the CSEG RECORDER and the Ex-Chairman of the SEG Publications Committee. He received several awards at ONGC, and more recently has received the ‘Best Poster’ Award for his poster entitled ‘Seismic attributes for fault/fracture characterization’ that he presented at the 2007 SEG Convention held at San Antonio, the 2007 ‘Best Paper’ Award for his paper entitled ‘Curvature and iconic Coherence-Attributes adding value to 3D Seismic Data Interpretation’ presented at the CSEG Technical Luncheon, Calgary in January 2007as well as the 2005 CSEG Meritorious Services Award. He and his colleagues have received the CSEG Best Poster Awards in successive years from 2002 to 2005. He is a member of SEG, CSEG, CSPG, EAGE, AAPG, APEGGA (Association of Professional Engineers, Geologists and Geophysicists of Alberta) and TBPG (Texas Board of Professional Geoscientists).
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Register by Monday 8-Dec-08 12:00 PM CST
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Bill Fahmy |
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