History homework help. Find the isothermal compressibility factor(2). A sandpack of uniform fine grains has an effective porosity of 0.25. the average grain size diameter is approximately 0.12mm. calculate the permeability of the sandstone using Kozeny-Carman equation. This sandstone comes from a formation (T , Thickness ft) that is producing 40 API crude oil (Boi .3 bbl/STB) through a well (pressure psi, Diameter -in., and drainage area acres), using the figure above, find the oil and gas production rates?