Отправлено: 31.08.16 14:39. Заголовок: Calibration of a fractal model relating porosity to permeability and its use

Calibration of a fractal model relating porosity to permeability and its use for modeling hydrothermal transport processes in the Perth
Basin, Australia
Jan Niederau
Institute for Applied Geophysics and Geothermal Energy, E.ON Energy Research Center, RWTH Aachen University, Germany
Energy Procedia 59 ( 2014 ) 293 – 300


Abstract
Numerical modeling of geothermal systems requires the best possible knowledge of porosity and permeability within the
geothermal reservoir. The deep Jurassic Yarragadee Aquifer in the Perth Basin consists of various different lithofacies but is
characterized by a high average permeability and the likely occurrence of free convection, making this Aquifer to a promising
low-medium enthalpy geothermal reservoir unit.
We define a log(permeability) - porosity model based on a combination of the Kozeny-Carman equation and fractal theory and
calibrate it by nonlinear regression using a least-squares approach to the Yarragadee Aquifer in the Perth Basin. For the
calibration, we use over 100 measurement pairs of porosity and permeability from three boreholes in the vicinity of our model
domain. The calibrated model reasonably covers the control of lithofacies on permeability.

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Забавно
Из 100 образцов нашлась одна точка с пористостью 1% (у следующей уже около 7%) и по этой выборке подтвердили то, что назвали фрактальной моделью (5-ть коэффициентов)
претенциозно халтурить и в ФРГ и в Австралии никто не запрещает ;-)