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  • Articles  (3)
  • data processing  (3)
  • 1980-1984
  • 1970-1974  (3)
  • 1935-1939
  • 1972  (3)
  • Mathematics  (3)
  • Geosciences  (3)
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  • Articles  (3)
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  • 1980-1984
  • 1970-1974  (3)
  • 1935-1939
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  • Mathematics  (3)
  • Geosciences  (3)
  • 1
    Electronic Resource
    Electronic Resource
    A lithologic data-recording form for a computer-based well-data system (1972)
    Springer
    Mathematical geology 4 (1972), S. 61-72 
    Details
    ISSN: 1573-8868
    Keywords: data processing ; data recording ; data files ; lithology ; petroleum ; stratigraphy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract Well-data files maintained by petroleum companies and service companies are important sources of data for exploration geologists. To make these data readily accessible and useful for computer studies, three preliminary steps are necessary: (1) systematic data gathering and recording, (2) storage for ready retrieval, and (3) preparation of analysis programs. One important source of geologic data is lithologic descriptions of well cuttings and cores. The practical lithologic data-recording form described here is used routinely at the well site and in the laboratory. It is designed in an 80-column format and uses codes for lithologic characteristics, porosity, and hydrocarbon shows, and forms part of an integrated well-data file. This datarecording form has the advantages that descriptions are made according to a standardized format convenient to use at the well site, and the data are subsequently available in raw form relatively free from interpretive bias. A library of analysis and display programs can be assembled for utilization of the data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02083194
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Digital filtering as a tool for the study of some flysch deposits from the East Carpathians (Romania) (1972)
    Springer
    Mathematical geology 4 (1972), S. 103-113 
    Details
    ISSN: 1573-8868
    Keywords: data processing ; graphics ; statistics ; sedimentology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract Results from the application of digital filtering (simple and weighted averaging) to the analysis of sedimentary series are given. Two flysch sequences from the East Carpathians (Upper Eocene, Damacuşa Valley; and Lower Cretaceous, Sbrancani Valley) were studied. Individual components, affecting the conditions of deposition, were separated, and establishment of the geological significance of the components separated by digital filtering was investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02080296
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Operator error in petrographic point-count analysis: A theoretical approach (1972)
    Springer
    Mathematical geology 4 (1972), S. 35-43 
    Details
    ISSN: 1573-8868
    Keywords: data processing ; sampling ; statistics ; mineralogy ; petrology ; sedimentology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract Operator error in petrographic point-count analysis introduces bias into the estimates of proportion in a thin section. A correction for this bias, leading to an unbiased estimator of the true proportion in that thin section, is here proposed. Operator error also affects the confidence interval, and in this situation, too, an adjustment is possible. The approach proposed requires that the probabilities associated with operator error, categorized into A-type and B-type errors, are known or assumed. The A-type operator error tends to underestimate the true proportion in a thin section, whereas the B-type operator error tends to overestimate it.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02083191
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    Paper (German National Licenses)
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