Clear brine drilling fluids: A study of penetration rates, formation damage, and wellbore stability in full-scale drilling tests

Journal Article · Sat Feb 01 04:00:00 EST 1986 · SPE (Society of Petroleum Engineers) Drill. Eng.; (United States)

DOI:https://doi.org/10.2118/13441-PA· OSTI ID:5373172

Doty, P A

The performance of CaCl/sub 2//CaBr/sub 2/ clear brine fluid was compared with that of lignosulfonate-water-based and oil-invert-emulsion-based fluids in a series of full-scale laboratory drilling tests. Sandstone and shale rock samples were drilled with a clean CaCl/sub 2//CaBr/sub 2/ brine, a solids-contaminated CaCl/sub 2//CaBr/sub 2/ brine, a water mud, and an oil mud, all at 13-lbm/gal (1558-kg/m/sup 3/) density. Penetration rates were measured under various conditions of weight on bit, fluid flow rate, and differential wellbore/pore pressure. Drilling fluid filtration into the sandstone was measured under both drilling and circulating (nondrilling) conditions. After drilling, 2-in (5.08-cm) radial cores taken from the sandstone specimens were studied for permeability damage caused by the drilling fluids. In a separate test, shale specimens were exposed to circulating drilling fluids to examine wellbore stability effects.

• Research Organization: Dow Chemical Co.
• OSTI ID: 5373172
• Journal Information: SPE (Society of Petroleum Engineers) Drill. Eng.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Drill. Eng.; (United States) Vol. 1:1; ISSN SDENE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ALKALINE EARTH METAL COMPOUNDS
BENCH-SCALE EXPERIMENTS
BRINES
BROMIDES
BROMINE COMPOUNDS
CALCIUM BROMIDES
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CARBOHYDRATES
CHLORIDES
CHLORINE COMPOUNDS
COLLOIDS
COMPARATIVE EVALUATIONS
DENSITY
DISPERSIONS
DRILL BITS
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
EMULSIONS
ENERGY SOURCES
EQUIPMENT
FLOW RATE
FLUID FLOW
FLUIDS
FORMATION DAMAGE
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
LIGNIN
NATURAL GAS WELLS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PERMEABILITY
PETROLEUM
PHYSICAL PROPERTIES
POLYSACCHARIDES
RESERVOIR PRESSURE
ROCK-FLUID INTERACTIONS
ROCKS
SACCHARIDES
SANDSTONES
SEDIMENTARY ROCKS
STABILITY
SULFONATES
TESTING
WATER
WEIGHT
WELL DRILLING
WELL PRESSURE
WELLS