BAKER HUGHES - Drilling Fluids Reference Manual

RESERVOIR APPLICATION FLUIDS
Bridgewise
Bridgewise is a bridging technology designed by Baker Hughes Drilling Fluids to maximize
hydrocarbon recovery from reservoirs.
Bridgewise calculates the optimum blend of available calcium carbonate additives required to
effectively bridge reservoir pore openings of known size. By utilizing a particle size distribution
(PSD) database, Bridgewise allows the user to select the appropriate concentration and product
ratio to provide maximum formation protection. This proprietary calculator is primarily used as a
reservoir drill-in well planning tool, but in areas where there is a history of loss of circulation,
Bridgewise may be used to select an appropriate LCM blend.
Features and Benefits
• Includes a choice of bridging rules
• Abrams 1/3 Rule
• Kaeuffer SQRT Rule
• Vickers Rule
• Selects fit-for-purpose products
• Acid soluble products
• LCM materials
• User defined products
• Uses core data for PSD (Particle Size Distribution) selection
• Pore size in μm (microns)
• Winland permeability/porosity
• Permeability
• Utilizes a PSD database
• MIL-CARB Series
• FLOW-CARB series
• Locally analyzed product
• Allows S.I. or Oilfield Units
Bridging Rules
Several calculation methods (rules) are available and can be used to compare the recommended
output values of each. However, scores of tests comparing spurt and total filtration volumes and
formation damage lead Baker Hughes Drilling Fluids to introduce the “Vickers Rule”. This rule
offers an improvement over the often used Abrams and Kaeuffer Rules by selecting a more
effective PSD of graded calcium carbonate for the entire range of expected pore sizes.
The Vickers Rule has been validated in numerous laboratory tests.
BAKER HUGHES DRILLING FLUIDS
REFERENCE MANUAL
REVISION 2006 6-105