Polymer additives improve cementing in salt formations
Journal Article
·
· Oil Gas J.; (United States)
OSTI ID:6468530
- Dowell Schlumberger Inc., Houston, TX (US)
Recently, new anionic aromatic polymers (AAP's) have been identified that simultaneously impart to salt-rich cement slurries improved fluid-loss control and exceptional rheological properties. At the same time, these materials do not significantly extend the slurry-thickening time or impair the compressive strength development of the cement. Thus, the casing strings are protected in plastic zones very soon after completing the cement job. The cementing of wells penetrating massive salt formations has posed a number of problems over the years. Contributing to the problem was the fact that some cements displayed poor characteristics in saline environments, and that conventional additives were of limited use in these systems. Other additives, designed for salt water, were found to provide characteristics far from the optimum, while at the same time causing detrimental effects on other slurry properties, notably rheology, thickening time, and early compressive strength. In several areas, the presence of salt domes and massive evaporite sequences cause problems in the drilling, completion, and long-term production of oil and gas wells that penetrate these zones.
- OSTI ID:
- 6468530
- Journal Information:
- Oil Gas J.; (United States), Journal Name: Oil Gas J.; (United States) Vol. 86:49; ISSN OIGJA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
ADDITIVES
BUILDING MATERIALS
CAVITIES
CEMENTING
CEMENTS
COMPRESSION STRENGTH
DISPERSIONS
FUEL SLURRIES
FUELS
MATERIALS
MECHANICAL PROPERTIES
MIXTURES
NATURAL GAS WELLS
OIL WELLS
POLYMERS
RHEOLOGY
SALT CAVERNS
SLURRIES
SUSPENSIONS
WELL CASINGS
WELL COMPLETION
WELLS
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
ADDITIVES
BUILDING MATERIALS
CAVITIES
CEMENTING
CEMENTS
COMPRESSION STRENGTH
DISPERSIONS
FUEL SLURRIES
FUELS
MATERIALS
MECHANICAL PROPERTIES
MIXTURES
NATURAL GAS WELLS
OIL WELLS
POLYMERS
RHEOLOGY
SALT CAVERNS
SLURRIES
SUSPENSIONS
WELL CASINGS
WELL COMPLETION
WELLS