BAKER HUGHES - Drilling Fluids Reference Manual

RESERVOIR APPLICATION FLUIDS
Figure 6 - 13
No-Water-Added CARBO-CORE Typical Flow Properties
However, should water contamination exceed 5% to 10%, it is recommended to dilute with oil,
displace the system with new fluid, or simply convert the CARBO-CORE to a conventional
CARBO-DRILL SM system. This can be accomplished with the addition of calcium chloride to
reduce the activity of the water phase to a desired range. Further additions of CARBO-MUL ® HT
and CARBO-TEC TM will maintain fluid stability as the water content increases.
COMPLETION FLUIDS
Introduction to Clear Brines
Proper completion fluid selection is an important parameter directly related to the success of any
well. The invasion of dirty fluids into the formation will cause damage or severe impairment to the
productivity or injectivity of a well. Clear solids-free brines have gained widespread acceptance as
part of a general practice for completion and workover applications due to their ability to meet the
following desired properties and performance.
• Non-damaging to the formation
• Density ranges to provide sufficient hydrostatic pressure
• Economical
• Commercially available
• Environmentally safe and friendly
• Low corrosion rates
• Stable under in-situ conditions
BAKER HUGHES DRILLING FLUIDS
REFERENCE MANUAL
REVISION 2006 6-41