The determination of permeability in in-situ marine-floor sediments
A method of evaluating in situ permeability of unconsolidated marine floor sediments has beendeveloped using mathematical manipulation of previously formulated empirical equations. The final equation makes use of various sediment characteristics that can be mathematically described andused to calculate permeability without greatly disturbing the sediment. The formula requires aknowledge of the soil's median grain size, pore shape, porosity, and formation factor (the resistivity ofthe fluid itself). Calculated permeabilities came to within 16% or less of those measured for a series of natural sands when a simple coefficient was introduced into the equation for the data available.Original calculated permeabilities were consistently close to five times greater than those measuredfor the same natural sand samples. The need for a coefficient to adjust calculated permeabilities could possibly be due to sorting effects that were not considered in the derivation; the incorporation ofthese effects remains an area of future investigation.
Goldsberry, Stephen L.