Data Manipulation

On the dangers of 'statistical smearing' Dake wrote of what he did not consider 'small, fastidious' points. There were three;

“The evaluation of formation heterogeneity using probability distributions of permeability. This totally neglects gravity and therefore disregards Newton’s second law of motion.”

Practice - p2  (Section p 380 -381)

“Plotting of core permeability on a logarithimic scale when viewing their distribution across a reservoir section. Darcy’s flow law specifically states that the velocity of advance of a fluid is proportional to the permeability of a layer: not the logarithm of its permeability”

Practice – p2  (p 406-407)

“Application of convoluted petrophysical transforms to generate permeability distributions across formations. Considering the expensive errors this leads to, it is much cheaper to core ‘everything’”

Practice – p2 (p378-379)