Effect of clays, limestone, and gypsum on soluble oil flooding
Journal Article
·
· J. Pet. Technol.; (United States)
Clay and gypsum greatly reduce the oil recovery of the soluble-oil polymer flood, while limestone has virtually no effect. Gypsum dissolves in flooding solutions and liberates calcium ions which affect the soluble oil flood in two ways: (1) precipitate some of the petroleum sulfonates, and (2) reduce the viscosity of polyacrylamide solution, which causes an increase in mobility and reduces oil displacing capacity. Montmorillonite clays reduce oil recovery and have more effect as the water becomes less saline. Calcium clays reduce the effectiveness of the soluble oil-polymer floods by (1) adsorbing surfactant, (2) adding Ca/sup + +/ to the flooding solution by cation exchange and thereby precipitating calcium sulfonate, and (3) adsorbing polymer and increasing mobility of the polymer solution. Limestone has no appreciable effect because it is relatively insoluble in the flooding solutions.
- OSTI ID:
- 7301344
- Journal Information:
- J. Pet. Technol.; (United States), Journal Name: J. Pet. Technol.; (United States) Vol. 27; ISSN JPTJA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CARBONATE ROCKS
CLAYS
ENERGY SOURCES
ENHANCED RECOVERY
ESTERS
FLUID INJECTION
FOSSIL FUELS
FUELS
GYPSUM
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIMESTONE
MICROEMULSION FLOODING
MINERALS
MISCIBLE-PHASE DISPLACEMENT
MONTMORILLONITE
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM SULFONATES
POLYAMIDES
POLYMERS
RESERVOIR ROCK
ROCKS
SEDIMENTARY ROCKS
SULFATES
SULFONATES
SULFONIC ACID ESTERS
SULFUR COMPOUNDS
WELL STIMULATION
WELLS
020300* -- Petroleum-- Drilling & Production
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CARBONATE ROCKS
CLAYS
ENERGY SOURCES
ENHANCED RECOVERY
ESTERS
FLUID INJECTION
FOSSIL FUELS
FUELS
GYPSUM
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIMESTONE
MICROEMULSION FLOODING
MINERALS
MISCIBLE-PHASE DISPLACEMENT
MONTMORILLONITE
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM SULFONATES
POLYAMIDES
POLYMERS
RESERVOIR ROCK
ROCKS
SEDIMENTARY ROCKS
SULFATES
SULFONATES
SULFONIC ACID ESTERS
SULFUR COMPOUNDS
WELL STIMULATION
WELLS