OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ofite.com
5
• Oil Calibration Date:
shows the date the base fluid was calibrated
• Known Salinity:
this check-box is used to determine if the test is go-
ing to be run in “Known Salinity” or “Estimated Salinity” mode.
○
Known Salinity Mode:
In this mode, basic information about the
salinity of the brine phase in the drilling fluid is used to estimate
the oil, water, and solids fraction in the fluid. Currently it is as
-
sumed that the brine is only comprised of calcium chloride. The
user inputs the brine salinity based on their Silver Nitrate titration.
There are 4 choices for the salinity input:
- mg Cl
-
ions per liter of mud (comes directly from the volume of
Silver Nitrate used for titration)
- mg CaCl
2
per kg of brine (or part per million)
- weight percent CaCl
2
in brine
- mg Cl
-
ions per liter of brine
In “Known Salinity” mode, only one stage of measurement on the
whole drilling fluid is required. It is not required to perform the sec
-
ond stage of measurement on the diluted mud sample.
○
Estimated Salinity Mode:
In this mode, the salinity data for the
brine is estimated using the data and no information on the brine
is required. In this mode, 2 stages of measurement are required:
-
In the first stage, measurement is performed on the whole drill
-
ing fluid sample
- In the second stage, the software will prompt to run this stage
using the diluted mud sample. This requires mixing 20 mL of
whole drilling fluid with 205 mL of the DSX7 surfactant solution
(#365-20-4).
