Evaluation of Horner plot-corrected log-derived temperatures in the Danish Central Graben, North Sea

Autor: Douglas W. Waples, May Ritt Pedersen
Rok vydání: 2004
Předmět:
Zdroj: Natural Resources Research. 13:223-227
ISSN: 1573-8981
1520-7439
DOI: 10.1007/s11053-004-0130-9
Popis: A small dataset comprising all temperature available data from reliable Horner plots from the Danish Central Graben was examined. Temperatures obtained by extrapolation using standard Horner plots were determined to be lower than “true” formation temperatures, as interpreted from DST data. Excellent agreement between “true” formation temperatures and Horner plot temperatures was achieved when the Horner plot temperatures (THP) were corrected upward by an amount proportional to the slope (A) of the Horner plot using the equation $\hspace*{120pt}T_{\rm true} = T_{\rm HP} + 26\cdot \exp(-0.0052\,{\it A}) $ where the temperatures and the slope are in degrees Celsius. The standard deviation of the error in the corrected Horner plot temperatures was 2.1°C, indicating that this method is consistent. Further studies using larger numbers of Horner plots from a variety of geographic areas should be carried out to test and refine the hypotheses presented here. Efforts also should be made to understand the causes of variability in slopes of Horner plots.
Databáze: OpenAIRE
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