The Rising Influence of Rising Affluence

[old man]

Charlie -- Can you help an old man? I'm trying to understand permeability a bit better. In an off shore resevoir with porosity in the 20% to 28% range and with other factors like pressure and temperature unknown, how should a permeability measurement of 200mD be considered? I found this on Wikipedia:

For a rock to be considered as an exploitable hydrocarbon reservoir without stimulation, its permeability must be greater than approximately 100 mD (depending on the nature of the hydrocarbon - gas reservoirs with lower permeabilities are still exploitable because of the lower viscosity of gas with respect to oil). Rocks with permeabilities significantly lower than 100 mD can form efficient seals (see petroleum geology). Unconsolidated sands may have permeabilities of over 5000 mD.

TIA
John