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  • 1995 National Oil and Gas Assessment  (1)
  • Statistical versus geologic estimates  (1)
  • modeling  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Statistical map analysis techniques applied to regional distribution of uranium in stream sediment samples from the southeastern United States for the National Uranium Resource Evaluation Program (1980)
    Springer
    Mathematical geology 12 (1980), S. 339-366 
    Details
    ISSN: 1573-8868
    Keywords: uranium ; exploration geochemistry ; data display ; mapping digital filtering ; modeling ; computer graphics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract The U.S. Department of Energy National Uranium Resource Evaluation Program is collecting stream sediment samples at a nominal density of one per 13 km2 from two-degree quadrangles throughout the United States. Each sample has been analyzed for from 14 to 43 chemical elements and other variables. We describe new methods of statistical map analysis, which we have applied to the regional distribution of multielement data from four two-degree quandrangles in the southeastern United States including parts of the southern Appalachian Mountains and the Coastal Plain, with particular reference to uranium distributions. Patterns of uranium distribution are clearly related to the geological provinces and also to individual geologic belts, plutons, and smaller stratigraphic subdivisions. Our work developed several anomalies, some of which were followed up by additional field sampling in 1979 and 1980.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01029420
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  • 2
    Electronic Resource
    Electronic Resource
    Application of the modified Arps-Roberts discovery proces model to the 1995 U.S. National Oil and Gas Assessment (1995)
    Springer
    Natural resources research 4 (1995), S. 242-252 
    Details
    ISSN: 1573-8981
    Keywords: Discovery process models ; Field growth ; 1995 National Oil and Gas Assessment ; Statistical versus geologic estimates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract ARDS (version 4.01), a modified version of the Arps-Roberts discovery process model, was used to forecast the remaining oil and gas resources in more than 50 provinces, super-exploration plays, and individual plays in the onshore and offshore United States for the 1995 National Oil and Gas Assessment. The size distribution of oil and gas fields was estimated for the underlying distribution of fields; the size distribution for the remaining fields was calculated to be the difference between this distribution and that of discovered fields. The guidelines that govern the 1995 National Assessment require the underlying size distribution of fields to be estimated by using only data from two standard commercial data files (the NRG Associates field file and the Petroleum Information Inc. well file). However, a variety of situations required further modification of the discovery process modeling system; for example, multiple exploration plays that occurred nearly simultaneously and also displaced each other in time, and the phenomenon of field growth introduced a large bias in the forecasts produced by the discovery process models for some provinces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02257576
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    Paper (German National Licenses)
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