Low-density foamed Portland cements fill variety of needs
Foam cement has proven to be very effective in remedying pressure parting lost circulation. However, one must recognize that large volumes of foam slurry can easily be lost into a fractured formation because most foam slurries have low API fluid loss values and a very low solid volume/ slurry volume ratio--the exact properties desired for an effective fracturing fluid. Therefore: Successful lost circulation control with foam cement depends mainly on its low density thixotropic properties. By contrast, light weight slurries that contain micro-spheres, gilsonite or walnut hulls owe much of their lost circulation control to their fracture plugging ability. For this reason, it is advantageous to incorporate solid lost circulation materials into foam cement slurries. Cellophane flakes have been routinely used. In addition to overcoming the density limitations mandated by breakdown gradients, the successful foam cement job should always meet two general objectives. It should provide sufficient hydrostatic pressure to prevent entry of fluids or gas into the annulus. It should provide good cement soundness and sufficiently low permeability to prevent corrosive water and/ or gas from penetrating the cement sheath and affecting the casing.
- Research Organization:
- Halliburton Services, Rankin, TX
- OSTI ID:
- 5884435
- Journal Information:
- Oil Gas J.; (United States), Vol. 80:30
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
PORTLAND CEMENT
PHYSICAL PROPERTIES
WELL CASINGS
CEMENTING
DENSITY
FOAMS
FRACTURING FLUIDS
OIL FIELDS
PERMEABILITY
PLUGGING
SLURRIES
TEMPERATURE MEASUREMENT
THIXOTROPY
VOLUME
BUILDING MATERIALS
CEMENTS
COLLOIDS
DISPERSIONS
FLUIDS
GEOLOGIC DEPOSITS
MATERIALS
MINERAL RESOURCES
MIXTURES
PETROLEUM DEPOSITS
RESOURCES
SUSPENSIONS
020300* - Petroleum- Drilling & Production
360603 - Materials- Properties