Effects of pore pressure and mud filtration on drilling rates in a permeable sandstone
During laboratory drilling tests in a permeable sandstone, the effects of pore pressure and mud filtration on penetration rates were measured. Four water-base muds were used to drill four saturated sandstone samples. The drilling tests were conducted at constant borehole pressure with different back pressures maintained on the filtrate flowing from the bottom of the sandstone samples. Bit weight was also varied. Filtration rates were measured while drilling and with the bit off bottom and mud circulating. Penetration rates were found to be related to the difference between the filtration rates measured while drilling and circulating. There was no observed correlation between standard API filtration measurements and penetration rate.
- Research Organization:
- Drilling Research Laboratory Inc.
- OSTI ID:
- 5255811
- Report Number(s):
- CONF-8310121-
- Journal Information:
- Soc. Pet. Eng. AIME, Pap.; (United States), Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Vol. SPE12117; ISSN SEAPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
BENCH-SCALE EXPERIMENTS
BOREHOLES
CAVITIES
CRYSTAL STRUCTURE
DRILL BITS
DRILLING
DRILLING EQUIPMENT
DRILLING FLUIDS
EQUIPMENT
FILTRATION
FLUID FLOW
FLUIDS
MICROSTRUCTURE
MWD SYSTEMS
PERFORMANCE TESTING
PERMEABILITY
PORE PRESSURE
POROSITY
RESERVOIR ROCK
ROCK-FLUID INTERACTIONS
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SEPARATION PROCESSES
TESTING
WELL DRILLING