Foamed cement: A second generation. [Foamed cement slurries]

Conference · Thu Mar 01 04:00:00 EST 1984 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:6604670

Loeffler, N R

Advanced technology in design and implementation of stable foamed cement systems now offers new solutions to critical oil-field cementing problems well beyond the original utility of lightweight slurries in reducing hydrostatic pressure across fracture-sensitive zones. Implications of new high-performance foamed cement capabilities are discussed for specialized applications such as thermal recovery, deep cementing in a narrow annular gap, lost-circulation control and stimulation across fractured or washed-out zones, as well as other unique advantages in primary cementing. Specialized foamed cement studies reveal improved prevention of strength and permeability retrogression and enhanced thermal isolation for steamflood applications, all at significantly reduced fracture stress as compared to conventional extended systems. Because of their unique rheology, high-performance foam slurries can be designed to exhibit moderate thixotropy but maintain excellent fluidity at extremely low shear. Cement foams further aid zonal isolation due to improved shear bonding and enhanced pipe/cement/formation contact as a result of the expansive nature of the slurry during setting. A number of successful jobs are documented in which lightweight nitrified systems placed across weak and washed-out zones have been successfully perforated and fractured. Several new potential applications for moderate to high-density, stable, nitrified slurries are also discussed based on their unique performance.

• Research Organization: Dowell Division of Dow Chemical USA
• OSTI ID: 6604670
• Report Number(s): CONF-840388-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE12592
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CEMENTING
COLLOIDS
CONTROL
DISPERSIONS
ENHANCED RECOVERY
FLUID INJECTION
FOAMS
FRACTURED RESERVOIRS
HYDROSTATICS
MIXTURES
OIL WELLS
PERFORMANCE
PRESSURE CONTROL
RECOVERY
RESERVOIR PRESSURE
RHEOLOGY
SLURRIES
STEAM INJECTION
STIMULATION
SUSPENSIONS
TECHNOLOGY ASSESSMENT
THERMAL RECOVERY
WELL SERVICING
WELL STIMULATION
WELLS