The phase behavior of systems comprising North Sea reservoir fluids and injection gases

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

OSTI ID:6827409

Varotsis, N; Clancy, M; Stewart, G; Todd, A C

The design and use of an experimental system to measure the phase behaviour of systems comprising of reservoir fluids and injection gases is described in the first part of this study. The experiments can simulate in the laboratory the mass transfer that takes place between the advancing injection gas phase and the oil phase in the reservoir. A special feature of the equipment is the direct transfer of microlitre samples of the equilibrium high pressure phases to the gas chromatograph, thus eliminating errors associated with conventional blow down techniques. In the second part of this work, the developed phase behaviour simulator is described briefly and its main features are discussed. The use of the Schmidt-Wenzel Equation of State has improved drastically the accuracy of the predicted liquid phase densities at reservoir temperature and the COSTALD correlations are recommended for STO volumes. Generalised correlations for the interaction parameters of CO/sub 2/-hydrocarbons and CH/sub 4/-hydrocarbons have been developed from binary experimental data. Temperature and pressure dependent coefficients were found to match with excellent accuracy multicomponent mixtures' saturation data. The phase behaviour simulator tuned on own experimental data was used to predict miscibility conditions for a North Sea STO and a North Sea reservoir oil for CO/sub 2/ and N/sub 2/ injection schemes.

• Research Organization: Heriot-Watt Univ.
• OSTI ID: 6827409
• Report Number(s): CONF-8304162-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE/DOE 12647
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ATLANTIC OCEAN
BENCH-SCALE EXPERIMENTS
C CODES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON DIOXIDE INJECTION
CARBON OXIDES
CHALCOGENIDES
COMPUTER CALCULATIONS
COMPUTER CODES
ELEMENTS
ENERGY SOURCES
ENHANCED RECOVERY
EQUATIONS
EQUATIONS OF STATE
FLUID INJECTION
FLUID MECHANICS
FLUIDS
FOSSIL FUELS
FUELS
GAS INJECTION
MATHEMATICAL MODELS
MECHANICS
MISCIBLE-PHASE DISPLACEMENT
NITROGEN
NONMETALS
NORTH SEA
OIL WELLS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PHASE STUDIES
RECOVERY
RESERVOIR FLUIDS
SEAS
SURFACE WATERS
WELLS