Measurements on 48 rock samples from a petroleum reservoir.
Usage
rock
Arguments
format
A data frame with 48 rows and 4 numeric columns.
rll{
[,1] area area of pores space, in pixels
out of 256 by 256
[,2] peri perimeter in pixels
[,3] shape perimeter/sqrt(area)
[,4] perm permeability in milli-Darcies
}
source
Data from BP Research, image analysis by Ronit Katz, U. Oxford.
Details
Twelve core samples from petroleum reservoirs were sampled by 4
cross-sections. Each core sample was measured for permeability, and
each cross-section has total area of pores, total perimeter of
pores, and shape.