II. PETROPHYSICAL DATA
The goals and tasks of mining petrophysical data can
be concluded as the following three categories:
(I) Transformation or prediction among the different
parameters of physical properties.
The correlation exists in parameters of physical
properties, which means a physical property will change
regularly with the other physical property's change, and
then the different types of parameters of physical
properties can be transformed or predicted. The clay
minerals are composed of kaolinlite, illite, andreattite and
chlorite predict fourteen parameters in the mercury
penetration in Table 1. From the table, clay mineral
contents make precise predictions on the variation
coefficient. Furthermore, the accuracy of predicting
maximum pore-throat radius, displacement pressure,
average capillary radius, median radius and pore-throat
ratio is more than 60%. Therefore, the clay mineral