Vapor density measurement for estimating minimum miscibility pressure

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:7199292

Harmon, R A; Grigg, R B

An experimental method (Vapor Density Test) is described which uses the solvency (density) properties of carbon dioxide and oil composition to determine the minimum miscibility pressure (MMP) of carbon dioxide with crude oils. Empirical methods have been described in the literature which relate the MMP to the density of carbon dioxide, oil composition, and solvent properties of carbon dioxide. It has also been proposed that a density comparison of impure carbon dioxide and pure carbon dioxide could be used to predict the MMP for impure carbon dioxide if the pure carbon dioxide MMP was known. The ''Vapor Density'' method is a dynamic test which directly measures the density of the injection gas rich phase versus pressure. This provides direct measurements of the ability of the injected gas to extract components from the crude oil. This method is as easily applied to impure carbon dioxide or hydrocarbon injection gases as to pure carbon dioxide. The measurements are done in a constant volume visual PVT cell. In addition to measuring the upper phase density, the volume of the liquid (lower phase) is monitored to aid in the MMP determination. Experiments have been completed on crude oils over the 83/sup 0/ to 220/sup 0/F range. The MMP is easily estimated at low temperatures. A method is proposed to use the ''Vapor Density'' at higher temperatures where the MMP is not as apparent.

• Research Organization: Conoco Inc.
• OSTI ID: 7199292
• Report Number(s): CONF-861080-
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON DIOXIDE INJECTION
CARBON OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
DENSITY
DISPLACEMENT FLUIDS
EFFICIENCY
ENERGY SOURCES
ENHANCED RECOVERY
EQUIPMENT
EXPERIMENT PLANNING
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
GASES
IMPURITIES
LABORATORY EQUIPMENT
MATERIALS TESTING
MEASURING METHODS
MEDIUM TEMPERATURE
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PHASE STUDIES
PHYSICAL PROPERTIES
PLANNING
PRESSURE DEPENDENCE
RECOVERY
SOLUBILITY
SOLVENT PROPERTIES
STIMULATION
TESTING
VAPORS
WELL STIMULATION
WELLS