Effect of oil composition on minimum miscibility pressure - Part 2: Correlation

Journal Article · Sun Nov 01 04:00:00 EST 1987 · SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States)

DOI:https://doi.org/10.2118/14150-PA· OSTI ID:5634742

Orr, Jr, F M; Silva, M K

A new correlation for CO/sub 2/ minimum miscibility pressure (MMP) is proposed and tested. The correlation is based on experimental evidence that extraction of hydrocarbons from a crude oil depends most strongly on the size of the hydrocarbon molecules. Thus, an oil rich in hydrocarbons that are efficiently extracted should show a lower MMP than a heavier oil. The only crude-oil data needed for use of the correlation are a carbon-number distribution, which can be obtained easily by chromatography. The density of CO/sub 2/ at the MMP is correlated against a weighted-composition parameter. The MMP of any oil at a given temperature is estimated as the pressure required to yield that CO/sub 2/ density. The effects of contaminants in CO/sub 2/ can be estimated easily by calculating the pressure required to give a mixture density equal to that required for pure CO/sub 2/. Correlation accuracy was tested comparing predicted and measured MMP's for 35 oils. The proposed correlation produces MMP estimates accurate to within about 10% for most oils. Comparison of correlation predictions with those of other commonly used correlations indicates that the proposed correlation is significantly more accurate, particularly for recombined oils.

• Research Organization: Stanford Univ.
• OSTI ID: 5634742
• Journal Information: SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States) Vol. 2:4; ISSN SREEE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
023000 -- Petroleum-- Properties & Composition
CARBON DIOXIDE INJECTION
CHEMICAL COMPOSITION
CORRELATIONS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
PETROLEUM
PRESSURE DEPENDENCE
RECOVERY
SOLUBILITY
STIMULATION
WELL STIMULATION
WELLS