Charles L. Drake · Geophysics · 1962
Abstract In an article in a recent issue of the Oil and Gas Journal (Gardner, 1961), entitled "Let's make it the AAP_G Bulletin again," the complaint was aired that the Bulletin is devoting less attention to oil finding and more to research and general geological problems. Contributions from "commercial" geologists have declined and university contributions have held steady while contributions from government survey people and researchers have increased markedly. The number of oil field studies printed has decreased from 32 in 1940-41 to 4 in 1960-61. The article suggests that the lack of papers from commercial geologists reflects a lack of interest in the profession, particularly by younger geologists, since the character of the editorial board has not changed.
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Gérard C. Herman · Geophysics · 2002
Grech et al. use the first arrivals from a multi-offset VSP to determine the anisotropy parameters by traveltime inversion. The authors demonstrate the application of these parameters during anisotropic PSDM for enhanced depth imaging.
Shen et al. introduce a technique to AVO and FVO attribute estimation in the frequency domain and demonstrate the application of these attributes to the detection of fracture orientation in a carbonate reservoir in the Maporal field of southwestern Venezuela. They also show that reservoir heterogeneity has an important effect on AVO signatures and should be considered in fractured reservoir characterization.
Slater and Reeve propose that electrical geophysics methods are excellent tools for the investigation of the stratigraphy and hydrogeology of peatland systems and the related controls on vegetation communities observed at the surface. Whereas GPR and IP imaging are appropriate for determining peat and underlying lake sediment thickness, resistivity imaging is valuable for investigating the mineral basement, which exerts a strong control on peatland hydrogeology.
Soroka et al. demonstrate how 3-D AVO can be an effective tool for identifying potential missed reserves in old producing fields. The advantages of 3-D over 2-D AVO are discussed. Valuable acquisition and processing lessons learned in this early onshore 3-D AVO project are presented for future reference.
Berryman et al. present a new synthesis based on ideas of Gassman and Biot that uses compressional and shear wave velocities in a scheme that is much simpler to understand and apply, yet yields detailed information about porosity and fluid saturation magnitudes and spatial distribution. The density and the Lame elastic parameter λ are the two parameters determined from seismic velocities that also contain information about fluid saturation, and this observation leads to concepts for two types of λ -diagrams for evaluating partial and patchy saturation in reservoirs.
Prasad shows how P …
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Mike Hatch · Preview · 2020
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M. P. Moschetti, M. H. Ritzwoller, N. M. Shapiro · 2008
[1] We have applied ambient noise surface wave tomography to data that have emerged continuously from the EarthScope USArray Transportable Array (TA) between October 2004 and January 2007. Estimated Green’s functions result by cross-correlating noise records between every station-pair in the network. The 340 stations yield a total of more than 55,000 interstation paths. Within the 5- to 50-s period band, we measure the dispersion characteristics of Rayleigh waves using frequency-time analysis. High-resolution group velocity maps at 8-, 16-, 24-, 30-, and 40-s periods are presented for the western United States. The footprint of the TA encloses a region with a resolution of about the average interstation spacing ( 70 km). Velocity anomalies in the group velocity maps correlate well with the dominant geological features of the western United States. Coherent velocity anomalies are associated with the Sierra Nevada, Peninsular, and Cascade Ranges, Great Valley, Salton Trough, and Columbia basins, the Columbia River flood basalts, the Snake River Plain and Yellowstone, and mantle wedge features associated with the subducting Juan de Fuca plate.
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RWTH Publications (RWTH Aachen)
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Wade H. Shafer · 1987
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Wade H. Shafer · 1992
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Wade H. Shafer · 1993
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John R. Fanchi · Elsevier eBooks · 2002
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Ralph R. B. von Frese, William J. Hinze · digital Encyclopedia of Applied Physics · 2003
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Peter Lynch Met, Non-recursive Digital Filter · 2013
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Wade H. Shafer · 1996
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Wade H. Shafer · 1997
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Sammis, Charles G, Henyey, Thomas L · CERN Document Server (European Organization for Nuclear Research) · 1987
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Sammis, Charles G, Henyey, Thomas L · CERN Document Server (European Organization for Nuclear Research) · 1987
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Dr D. J. Fettes, Edinburgh Eh La, Mineral Reconnaissance Programme et al. · 2016
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Halverson, W. D., Little, R. G., Redi, O. et al. · DSpace@MIT (Massachusetts Institute of Technology) · 1964
Contains reports on four research projects.
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Breeding, R. J., Chapman, J. C., Urbanek, K. et al. · DSpace@MIT (Massachusetts Institute of Technology) · 2010
This group will be concerned with a variety of problems of geophysical interest, including laboratory investigations of the properties of matter and radiation under extreme conditions.The present program includes three principal projects.
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Sustainable Urban Development, Lanbo Liu, L S Chan · 2015
The new millennium has seen a fresh wave of world economic development especially in the Asian-Pacific region. This has contributed to further rapid urban expansion, creating shortages of energy and resources, degradation of the environment, and changes to climatic patterns. Large-scale, new urbanization is mostly seen in developing countries but urban sprawl is also a major social problem for developed nations. Urbanization has been accelerating at a tremendous rate. According to data collected by the United Nations [1], 50 years ago less than 30 % of the world population lived in cities. Now, more than 50% are living in urban settings which occupy only about 1 % of the Earth’s surface. During the period from 1950 to 1995, the number of cities with a population higher than one million increased from 83 to 325. By 2025 it is estimated that more than 60 % of 8.3 billion people (the projected world population [1]) will be city dwellers. Urbanization and urban sprawl can affect our living quality both positively and negatively. In recent years geophysics has found significant and new
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Yong Ma · 2010
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