Focus Article

Temporary Seismic Stations Boost Tomography Capability to look into the Earth. Case Studies in the Northwestern Alps, Italy

STEFANO SOLARINO ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA, INGV, ITALY, STEFANO.SOLARINO@INGV.IT Abstract Seismic tomography serves as a potent means to investigate the Earth's internal structure. This method closely resembles the one used in medicine and relies on variations (in path, amplitude or velocity) that seismic rays experience when passing through an anomalous body, such as a rock with higher density or an area subjected to high temperature. In the case of seismic tomography, earthquakes act as emitters while seismic stations function as receivers. Unlike in medicine, where a specialized machine ensures a uniform distribution of emitters and receivers, seismic rays [...]

Temporary Seismic Stations Boost Tomography Capability to look into the Earth. Case Studies in the Northwestern Alps, Italy2024-06-26T11:35:00-06:00

From Seismic to Permeability Characterization: A Combined Rock Physics, BVW Modelling and Seismic Inversion Workflow

DRAGA TALINGA PH.D., SENIOR GEOPHYSICIST, CENOVUS ENERGY, DRAGA.TALINGA@CENOVUS.COM STEVE CUDDY PH.D., SENIOR PETROPHYSICIST, PETRO-INNOVATIONS, STEVE.CUDDY@BTINTERNET.COM Summary Field development of fluvio-marine reservoirs is challenging because the sand distribution in these systems is complex and difficult to predict. The rivers interacting with the marine systems create diverse depositional settings, from river channels and tidal flats to deltas and floodplains. Within these settings, many sedimentary structures are formed, and within these structures, the size, shape and sorting of the grains – all with influence on permeability - are highly variable. The uncertainty in understanding how reservoir properties vary in these complex architectures creates [...]

From Seismic to Permeability Characterization: A Combined Rock Physics, BVW Modelling and Seismic Inversion Workflow2024-07-23T13:13:28-06:00

3D Phase Congruency: A Novel Technology for Fault Skeletonization

HAYFA AL-SUHAIMI PRINCE MUHAMMAD UNIVERSITY, HAYFA.ALSUHAIMI@GMAIL.COM SALEH AL-DOSSARY SAUDI ARAMCO, SALEH.DOSSARY.6@ARAMCO.COM Abstract The resolution of seismic imagery greatly impacts a geoscientist’s ability to accurately identify and interpret subsurface features. Here, a novel and automated workflow is proposed to generate high-resolution imagery of subsurface geological features, such as faults, fractures and channels. The workflow consists of two components: 1) noise removal, and 2) geo-body edge detection and enhancement. The technology exploits the Phase Congruency Filtering (PCF) technique to produce a higher-resolution subsurface image. The two-component workflow is applied in three broad steps. Firstly, a median filter is applied to the input seismic [...]

3D Phase Congruency: A Novel Technology for Fault Skeletonization2024-05-02T12:36:24-06:00

Geophysics Research at the University of Victoria

STAN DOSSO¹ 1UNIVERSITY OF VICTORIA, SCHOOL OF EARTH AND OCEAN SCIENCES, VICTORIA BC CANADA SDOSSO@UVIC.CA LUCINDA LEONARD¹, EDWIN NISSEN¹, JOHN CASSIDY2,1, HONN KAO2,1, KELIN WANG2,1 ¹UNIVERSITY OF VICTORIA, SCHOOL OF EARTH AND OCEAN SCIENCES, VICTORIA BC CANADA ²PACIFIC GEOSCIENCE CENTRE, GEOLOGICAL SURVEY OF CANADA, SIDNEY BC CANADA The contents of this article, including all figures, are the property of the Crown and are provided to the CSEG with its permission. Copyright remains with the Crown and may not be transferred. Introduction The University of Victoria (UVic) offers a geophysics undergraduate degree through a joint program between the School of Earth [...]

Geophysics Research at the University of Victoria2024-04-26T12:40:21-06:00

A Bayes’ Theorem Tutorial

BRIAN RUSSELL VICE-PRESIDENT, GEOSOFTWARE. BRIAN.RUSSELL@GEOSOFTWARE.COM   Introduction This tutorial is intended to illustrate the power of Bayes’ theorem using a straightforward seismic exploration example. This example will show how to evaluate the effectiveness of combining AVO attribute analysis with drilling results. As a tutorial, it is like many others used in the explanation of Bayes’ theorem, but instead of using examples like apples and oranges or white and black balls, I will use terminology that you can relate to as exploration geoscientists. Even with this relatively simple example, you will find Bayes’ theorem is not an easy concept to understand, [...]

A Bayes’ Theorem Tutorial2024-02-28T22:11:38-07:00

CCS value written in a bowtie

LEE HUNT GEOPHYSICIST, CARBON ALPHA, LHUNT@CARBONALPHA.COM All aspects of a CCS project are tied back to risk management; value in the geosciences, including seismic, are directly related to their role in reducing project risk.   Summary Much of the world is looking to carbon capture and storage (CCS) to reduce anthropogenic carbon dioxide (CO2) emissions. The number of carbon storage projects under development has exploded - with over 200 currently proposed projects worldwide (Hauber, 2023). Geoscientists engaged in subsurface work on these projects are interested in providing the most value possible to these projects. But where is that value added? [...]

CCS value written in a bowtie2024-01-04T21:32:14-07:00

Bandwidth Extension of Seismic Data and its Impact on Seismic Unsupervised Facies Classification

SATINDER CHOPRA SAMIGEO, CALGARY, CANADA, SATINDER.CHOPRA@SAMIGEO.COM RITESH KUMAR SHARMA SAMIGEO, CALGARY, CANADA JOHN P. CASTAGNA THE UNIVERSITY OF HOUSTON, USA KURT J. MARFURT THE UNIVERSITY OF OKLAHOMA, NORMAN Abstract Bandwidth extension of seismic data is a desirable goal when the available data has inadequate frequency content to delineate thin beds, facies changes, and subtle faults. Though significant efforts are expended to preserve frequency content during processing of seismic data, processes such as multi-window statistical deconvolution, inverse-Q filtering, as well as time-varying spectral whitening, are not effective enough when the intervals to be characterized are below tuning. Consequently, methods have been [...]

Bandwidth Extension of Seismic Data and its Impact on Seismic Unsupervised Facies Classification2024-04-26T12:42:44-06:00

Impact of Spectral Balancing of Seismic Data on some Unsupervised Facies Analysis

SATINDER CHOPRA SAMIGEO, CALGARY, SATINDER.CHOPRA@SAMIGEO.COM RITESH KUMAR SHARMA SAMIGEO, CALGARY, RITESH.SHARMA@SAMIGEO.COM KURT J. MARFURT THE UNIVERSITY OF OKLAHOMA, NORMAN HEATHER BEDLE THE UNIVERSITY OF OKLAHOMA, NORMAN ALEXANDRO VERA-ARROYO THE UNIVERSITY OF OKLAHOMA, NORMAN Abstract The interpretation of discrete stratigraphic features on seismic data is limited by its bandwidth and its signal-to-noise ratio. Unfortunately, well-resolved reflections from the top and base of subtle stratigraphic geologic boundaries occur only for features thick enough to be imaged by the bandlimited data. In contrast, seismically thin stratigraphic features approaching a quarter-wavelength in thickness give rise to composite, or “tuned,” seismic reflections. Data conditioning to [...]

Impact of Spectral Balancing of Seismic Data on some Unsupervised Facies Analysis2023-11-02T22:55:19-06:00

Quantifying Saturation in the Sleipner CO2 Storage: A Rock Physics-Based Approach for Seismic Data Analysis

MANZAR FAWAD KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS (KFUPM)/ RESEARCH SCIENTIST II, MANZAR.FAWAD@KFUPM.EDU.SA NAZMUL HAQUE MONDOL UNIVERSITY OF OSLO/ PROFESSOR, M.N.H.MONDOL@GEO.UIO.NO NORWEGIAN GEOTECHNICAL INSTITUTE/ ADVISOR-ADJUNCT POSITION, NHM@NGI.NO Abstract This research aims to evaluate the underground CO2 storage site at Sleipner in the North Sea, Norway, by applying a newly proposed rock physics model to extract saturation from seismic data. Our focus is the CO2 storage reservoir unit of the Utsira Formation (a shallow saline formation where CO2 from produced natural gas is injected and stored) to validate the new rock physics model. The saturation information was used to determine [...]

Quantifying Saturation in the Sleipner CO2 Storage: A Rock Physics-Based Approach for Seismic Data Analysis2024-04-26T12:45:50-06:00

Geophysical Field Schools at the University of Saskatchewan

IGOR MOROZOV, JIM MERRIAM, and SAM BUTLER UNIVERSITY OF SASKATCHEWAN, DEPTARTMENT OF GEOLOGICAL SCIENCES, SASKATOON, SK, CANADA, IGOR.MOROZOV@USASK.CA Abstract Mineral resources are a foundation of the economy in western Canada and particularly in Saskatchewan. With recent changes in the markets and emphasis on sustainability and the green economy, there is an increasing demand for geophysics professionals. This article gives an overview of the geophysics program at the University of Saskatchewan and describes how it meets these new challenges. Field schools designed around continuous data acquisition projects have been the central element of our program for many years. This article gives [...]

Geophysical Field Schools at the University of Saskatchewan2023-10-03T12:26:19-06:00

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P.O. Box 520, Station M, Calgary, AB T2P 2J2

Phone: (403) 262-0015

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