Spreadsheets are used day in and day out by petrophysicists to work with data. To complete tasks quickly, we have developed many purpose-built crossplots.
- capillary pressure saturation height modeling
- converts laboratory fluids to reservoir fluid system
- relates saturation to rock type, porosity, permeability and height above free water level
- Buckles Plot
- used to help estimate irreducible water saturation
- helps identify intervals with moveable water
- core measured Permeability versus core measured porosity
- exponential, power law and polynomial models
- Lucia rock fabric based permeability for carbonate rocks
- Winland pore throat and Jennings Rock Classes
- used with capillary pressure data to help estimate permeability
- total organic carbon
- hydrogen index versus vitrinite reflectance in oil
- hydrogen index versus Tmax
- general petrophysical (some of these are available for use on this site – please see Interactive Crossplots)
- shale volume, porosity, lithology, water saturation
- temperature correction for water resistivity and equivalent salinity
- geothermal gradient
- complete summation to determine overburden stress
