Modeling the Frequency Distribution of Biostratigraphic Interval Zone Thickness in Sedimentary Basins
Sampling for microfossils in exploratory wells in basins with hydrocarbon potential is subject to considerable uncertainty, mainly because the samples are often small and subject to caving. Biostratigraphic events defined on fossil taxa include their last occurrences of which the depths along the wells generally can be measured without possible contamination. The RASC method for ranking and scaling of stratigraphic events produces an average basin-wide optimum sequence and zonation that can be used for correlation of strata between wells. In this optimum sequence the fossil events are ordered according to their occurrences in geological time. Depth differences between successive events in the optimum sequence satisfy a frequency distribution that is of interest for potentially increasing stratigraphic resolution. In this paper the depth difference frequency distribution is modeled for a large Cenozoic microfossil dataset consisting of 30 wells in the North Sea Basin. The shape of the depth difference frequency distribution satisfies a bilateral gamma distribution fitted by the construction of a best fitting straightline on a normal Q-Q plot of square root transformed average-corrected depth differences.
Frits Agterberg Felix Gradstein Gang Liu
Geological Survey of Canada, 601 Booth St., Ottawa, Canada K1A 0E8;Department of Earth Sciences, Uni Geological Museum, University of Oslo, PO Box 1172 Blindern, N-0318 Oslo, Norway Department of Earth Sciences, University of Ottawa, Ottawa, Canada K1N 6N5;State Key Laboratory of G
国际会议
The 12th Conference of the International Association for Mathematical Geology(第12届国际数学地质大会)
北京
英文
25-28
2007-08-26（万方平台首次上网日期，不代表论文的发表时间）