

   MMeeaassuurreemmeennttss oonn PPeettrroolleeuumm RRoocckk SSaammpplleess

   AArrgguummeennttss::

       area: of pores space, in pixels out of 256  x  256

       peri: perimeter, in pixels

      shape: perimeter/sqrt(area)

       perm: permeability in milli-Darcies

   SSUUMMMMAARRYY::

        A data frame with 48 rows and 4 columns.  Twelve core
        samples from petroleum reservoirs were sampled by 4
        cross-sections.  Each core sample was measured for per-
        meability, and each cross-section has total area of
        pores, total perimeter of pores, and shape.

   DDAATTAA DDEESSCCRRIIPPTTIIOONN::

   SSOOUURRCCEESS::

        Data from BP Research, image analysis by Ronit Katz, U.
        Oxford.

