BAKER HUGHES - Drilling Fluids Reference Manual

RESERVOIR APPLICATION FLUIDS
Typical Properties
Brine KCl NaCl CaCl 2
Fluid Weight, ppg 9.2 9.7 11.4
Funnel Viscosity, sec/qt 40 - 50 40 - 50 40 - 50
Plastic Viscosity, cP 10 - 20 15 - 25 20 -30
Yield Point (YP), lb/100ft 2 20 - 25 20 - 25 20 -30
Gel Strengths, lb/100ft 2 4 / 7 4 / 7 4 / 7
API Fluid Loss, ml/30 min < 4 < 4 < 4
pH 8.5 - 9.0 8.5 - 9.0 7.5 - 8.5
Troubleshooting
Problem Possible Cause Recommended Action
Increase in API
Filtrate
Increase in
Rheological
Properties
Decrease in
Rheological
Properties
Slugging Pipe for
trip
Sliding
1. Shift in particle size
2. Polymers degrading
3. Bacterial problem
1. Shift in particle size
2. Incorporated solids
Polymers degrading
Air entrapment
BHA Configuration
Hole Geometry
1. Pilot test to determine displacement volume
required.
2. Pilot test with W-306 TM / 307 TM or BIO-LOSE TM .
3. Pilot test 1 gallon X-CIDE® 102 per 100 bbls
fluid.
1. Pilot test to determine displacement volume
required.
2. MBT increased, pilot test for displacement
volume.
Pilot test with W306/307, XANVIS®, BIOZAN® or
XAN-PLEX D Polymer to determine treatment level.
Add 1/8 to 1/4 gallon LD-8 ® per 10 bbls of slug
volume. Use salt for some portion of the slug weight
Add 3% TEQ-LUBE ®
Foaming High Surface Tension Elevate pH to 9.0. Add defoamer LD-8 ®
Stuck Pipe Aggressive build rate Consult stuck pipe pills section of manual
CLEAR-DRILL ® Fluids
Introduction
To balance the formation pressures experienced down-hole, conventional drilling fluids are
required to cover a wide density range. In the majority of cases, the required fluid density has been
achieved by the addition of insoluble minerals, typically barite, which are suspended in the fluid by
a viscosifier. The CLEAR-DRILL family of drilling fluids departs from this standard technology
BAKER HUGHES DRILLING FLUIDS
REFERENCE MANUAL
REVISION 2006 6-28