What is DrNuc?

The DrNuc App is calculating the response for:

the litho-density tool

the neutron porosity tool

the pulsed neutron capture tool

the natural gamma-ray tool

Lithology type

Porosity

"Shale" volume

Water saturation and salinity

Oil saturation & density

Gas saturation & density

CO2 saturation and density

Clay weight percents

Many of the parameters are theoretical formation properties that are calculated from elemental compositions and nuclear data (e.g., rhoB, PEF, HI, Sigma and GR). However, the NPHI apparent neutron porosity is based on a "generic" neutron porosity logging tool (it is not specific to any service company).

A second calculator in the DrNuc app calculates the logging tool response due to the 3 most common clays: 

illite, 

kaolinite and 

smectite. 

 Petrophysicists know that there isn't one "shale" and that at times the term "shale" has different interpretations. The DrNuc App models a volume of the formation with a mix of minerals that have the following properties:

2.65 g/cc and PEF = 3.22

Sigma = 62 cu

HI = 0.12 & NPHI=19.3 pu

GR=150 GAPI.

Clay 

 Please read the "end user agreement".