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The SEG Wiki's main mission is to supply scientific materials to the geoscience community and the public through online books, tutorials, geoscience articles, and biographies of key geoscientists. SEG's two best-selling books are provided open and free of charge on the SEG Wiki: Encyclopedic Dictionary of Applied Geophysics and Seismic Data Analysis. The Knowledge tree is the gateway to a collection of scientific, mathematic, geophysical, and geological information for the student and professional. In addition, bi-monthly geophysical tutorials published in The Leading Edge are made available on the wiki. The wiki captures the history of the exploration geophysics discipline through hundreds of biographies that also highlights important contributions from the founding members of SEG and women in geoscience.
- Information Technology > Knowledge Management (1.00)
- Information Technology > Communications > Collaboration (1.00)
The principal objective is at 3000 m with a stacking velocity of 3000 m/s. What frequencies should be covered by a linear sweep? The vibroseis method employs a vibrator to impart to the ground a long train of harmonic signals of varying frequency. The vibrator consists of a piston pressing against a steel plate which is held against the ground by the weight of the vehicle. For the usual linear sweep, the vibrator, which is actuated hydraulically, exerts a pressure Failed to parse (SVG with PNG fallback (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.")
- Information Technology > Knowledge Management (0.76)
- Information Technology > Communications > Collaboration (0.76)
Failed to parse (SVG with PNG fallback (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") The Blondeau method starts with a curve of first breaks versus offset [Figure 8.21a(ii)] plotted on log-log graph paper; the curve is approximately a straight line with slope Failed to parse (SVG with PNG fallback (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") To remove the effect of a surface layer of thickness Failed to parse (SVG with PNG fallback (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") Then Failed to parse (SVG with PNG fallback (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") Next we use the Failed to parse (SVG with PNG fallback (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.")
- Information Technology > Knowledge Management (0.76)
- Information Technology > Communications > Collaboration (0.76)
Lisa Gavin is a geophysicist with academic and industry experience in the oil and gas industry. She has worked as a geophysicist at Fugro Seismic Imaging, Chevron, and is currently at Woodside Energy in Perth, Australia. She has interests in seismic anisotropy, quantitative interpretation, 4D seismic, and rock physics. Lisa completed a BSc with first class honors in Geophysics from Curtin University. She then joined the Centre for Energy Geoscience - CEG (formerly Centre for Petroleum Geoscience and CO2 Sequestration – CPGCO2) at the University of Western Australia (UWA) to complete a PhD in geophysics.
- Oceania > Australia > Western Australia > Perth (0.27)
- North America > United States > Texas > Harris County > Houston (0.16)
- Information Technology > Knowledge Management (0.76)
- Information Technology > Communications > Collaboration (0.76)
Lucy MacGregor is a leading researcher in multi-physics analysis with particular expertise in the integration of electromagnetic methods into reservoir characterization workflows. She served as SEG Honorary Lecturer in Europe in 2011 and as Distinguished Lecturer in 2021. Lucy has a PhD from the University of Cambridge for research in the field of controlled-source electromagnetic (CSEM) methods and over 25 years of experience in marine EM surveying and its application to the detection and characterization of fluids in the earth. Following her PhD, she was a Green Scholar at the Scripps Institution of Oceanography working on marine electromagnetic methods, before returning to Cambridge as a Leverhulme Trust/Downing College research fellow. In 2000 she moved to the National Oceanography Centre, Southampton as a NERC research fellow to continue her work, and she took part in the first survey targeting CSEM at hydrocarbon reservoirs.
- Information Technology > Knowledge Management (0.76)
- Information Technology > Communications > Collaboration (0.76)
Saleh A. Al-Dossary began his work at Saudi Aramco in the Dhahran Geophysical Research Group, contributing to edge-preserving and smoothing developments. He now works in the Exploration Application Services Department developing new seismic processing and attributes algorithms. Al-Dossary received his B.S. degree in Computer Science with a minor in geophysics from the New Mexico Institute of Mining and Technology, Socorro, NM. He received his M.S. degree from Stanford University, Palo Alto, CA, and he received his Ph.D. from the University of Houston, Houston, TX, both in Geophysics. Al-Dossary holds seven patents and is an applicant for five additional patents in seismic edge-preserving and detection technology.
- North America > United States > Texas > Harris County > Houston (0.25)
- North America > United States > New Mexico > Socorro County > Socorro (0.25)
- North America > United States > California > Santa Clara County > Palo Alto (0.25)
- Asia > Middle East > Saudi Arabia > Eastern Province > Dhahran (0.25)
- Energy > Oil & Gas > Upstream (1.00)
- Government > Regional Government > Asia Government > Middle East Government > Saudi Arabia Government (0.62)
- Information Technology > Knowledge Management (0.76)
- Information Technology > Communications > Collaboration (0.76)
Xiaogui Miao has extensive experience in land 3D3C and Ocean Bottom Sensor (OBC & OBN) 3D4C imaging from North America to the Asia Pacific (APAC) region. After graduation from the University of Manitoba, Canada with a PhD in Geophysics (1994), Xiaogui Miao joined Veritas Geophysical Services Ltd. in Calgary as a geophysical research scientist. In 2008, after Veritas and CGG merged, she became the research and processing center manager at CGG's newly opened Beijing Center. In 2015, she moved to Singapore, the APAC Hub of CGG, where she has since been in charge of multi-component and seabed imaging research. Miao has developed a variety of multi-component processing and imaging technologies and published many articles.
- North America > Canada > Manitoba (0.25)
- North America > Canada > Alberta > Census Division No. 6 > Calgary Metropolitan Region > Calgary (0.25)
- Asia > China > Beijing > Beijing (0.25)
- Information Technology > Knowledge Management (0.76)
- Information Technology > Communications > Collaboration (0.76)
Patricia de Lugão received a Bachelor of Science degree in environmental engineering and water resources from the University of South Carolina in 1988, a master's degree in geophysics from the Observatório Nacional in Rio de Janeiro in 1992 and a Ph.D. in geophysics from University of Utah in 1997. At Observatório Nacional, she worked with Sergio Fontes on the acquisition, processing, and modeling of magnetotelluric data from the Recôncavo Basin, Brazil. During her Ph.D. studies at the University of Utah, de Lugão had the good fortune to work with Phil Wannamaker and Michael Zhdanov on the development of modeling and inversion algorithms for magnetotellurics. After her Ph.D., de Lugão worked in the research department at Western Atlas in Houston with Kurt-Martin Strack, where she applied her knowledge in modeling and inversion to the development of algorithms for array borehole tools. In the Geosignal division of Western Atlas, Patricia worked with Lee Bell on two- and three-dimensional refraction tomography techniques for statics correction and initial velocity model for prestack depth migration of seismic data from the foothills of South America to the Gulf of Mexico.
- North America > United States > Utah (0.47)
- South America > Brazil > Rio de Janeiro > Rio de Janeiro (0.26)
- Geophysics > Electromagnetic Surveying (1.00)
- Geophysics > Seismic Surveying > Seismic Modeling > Velocity Modeling (0.72)
- Geophysics > Seismic Surveying > Seismic Processing (0.57)
- South America > Brazil > Brazil > South Atlantic Ocean > Santos Basin (0.99)
- South America > Brazil > Bahia > Reconcavo Basin (0.99)
- Information Technology > Knowledge Management (0.76)
- Information Technology > Communications > Collaboration (0.76)
Heloise B. Lynn started working in reflection seismic in the oil/gas industry in 1975, processing seismic data at Texaco, in Houston, Texas. In 1978, she completed her MS in Exploration Geophysics, Stanford University, and in December, 1979, she completed her PhD in Geophysics, also at Stanford University, in (post-stack) depth migration and interpretation issues within migration algorithms. Lynn worked for Texaco, Amoco, BP, and then in 1984, she and her husband, Walt, formed Lynn Incorporated. Her consulting experience includes working in North America, Hungary, Qatar, Kuwait, Saudi Arabia, Pakistan, Australia, Thailand, China, and Japan. She specializes in the use of 3D multiazimuth and/or multicomponent data to obtain structure, lithology, porosity, pore fluids, in-situ stress, and aligned porosity (aka natural fractures).
- Asia (1.00)
- North America > United States > Texas > Harris County > Houston (0.55)
- Geology > Geological Subdiscipline > Geomechanics (0.91)
- Geology > Structural Geology > Tectonics > Plate Tectonics (0.47)
- Information Technology > Knowledge Management (0.86)
- Information Technology > Communications > Collaboration (0.76)
Jack Petrovich Dvorkin earned his PhD in 1980 and MS and BSc in 1974 in Continuum Mechanics and Mathematics, all from Lomonosov Moscow University. Currently, he is a faculty member and program leader for Rock Science Program at the College of Petroleum Engineering and Geosciences at King Fahd University in Saudi Arabia, College of Petroleum Engineering and Geosciences. In 1989-2017, he worked as a senior research scientist in Rock Physics Laboratory at Stanford University. Between 1974 and 1989, he worked in the petroleum industry in the USSR. He has co-authored 180 scientific papers, six books, and nine U.S. patents.
- Europe > Russia > Central Federal District > Moscow Oblast > Moscow (0.28)
- Asia > Middle East > Saudi Arabia (0.25)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock (0.73)
- Geology > Geological Subdiscipline > Geomechanics (0.54)
- Information Technology > Knowledge Management (0.76)
- Information Technology > Communications > Collaboration (0.76)