News

The Rw vs. Temperature Interactive Crossplot has been updated. This crossplot displays water resistivity (Rw) as a function of temperature and now includes solution concentration outputs in mg/L and ppm (salinity), as well as solution density. These outputs allow a direct comparison to water analysis reports, making Rw assignment easier.

A chart which presents water resistivity (Rw) at 25 deg. C vs. NaCl salinity, based on Schlumberger's Gen 9 chart is now available. With this chart, it is easy to determine Rw at a given salinity (the original Gen 9 Chart requires the user to follow a line across a large temperature range, making accuracy difficult, especially at high salinities).

A NaCl solution density at 25 deg. C vs. NaCl concentration (ppm and mg/L) chart is now available. This chart is useful because it allows the user to determine solution density at a given NaCl concentration, which then enables conversion from mg/L to ppm, or vice versa.

Poisson's Ratio vs. Compressional to Shear Velocity Ratio (VPVS) Interactive Crossplot has been added. This crossplot is used to determine Poisson's ratio and identify intervals which might be affected by light hydrocarbon.

Eight new petrophysical crossplots are now available for use on the Interactive Crossplots page. These include:

• Static Spontaneous Potential vs.Rmfe/Rwe
• Ion Multiplier vs. Total Solids Concentration
• Log Porosity vs. Log Deep Resistivity Pickett Crossplot
• Formation Factor vs. Porosity
• Resistivity Index vs. Brine Saturation
• Nonlinear Resistivity vs. Linear Porosity Hingle Crossplot
• Nonlinear Resistivity vs. Linear Bulk Density Hingle Crossplot
• Nonlinear Resistivity vs. Linear Compressional Sonic Hingle Crossplot

Try them out and give us your opinion on which crossplot should be developed next.

Aptian thanks our clients for keeping us busy the past decade. Direct referrals continue to generate work and we have now completed hundreds of projects, comprising thousands of wells.

The website was built to improve our ability to communicate with clients regarding petrophysical project requirements and technical issues. The site includes many resources which can be used to answer petrophysical questions. Aptian hopes clients will enjoy the website and we look forward to the next decade of service.