A laboratory and field evaluation of the CO/sub 2/ huff 'n puff process for light oil recovery
This paper is a laboratory and field investigation of the CO/sub 2/ huff 'n puff process for the enhanced recovery of light crude oil. The results of continuous and cyclic CO/sub 2/ displacements using a 31.2 /sup 0/API (870 kg/m/sup 3/) stock tank oil in watered-out Berea cores are presented. Fourteen single-well cyclic CO/sub 2/ field tests in south Louisianan sands are examined. Laboratory results demonstrate that the CO/sub 2/ huff 'n puff process recovers waterflood residual oil. Incremental oil recovery increased with the amount of CO/sub 2/ injected, and was not benefited by operating at the minimum miscibility pressure (MMP). Maximum ultimate incremental oil recovery required a soak period and additional water influx. Incremental oil recovery continued with a second cycle of CO/sub 2/, but a third cycle showed significant decline. Recovery factors averaging less than 2 Mscf (57 m/sup 3/) of CO/sub 2/ per barrel of incremental oil were achieved in nine out of fourteen field tests. Field results suggest that in the absence of mechanical problems, initial response improved with larger space occupied by CO/sub 2/, thicker perforation interval, and lower CO/sub 2/ reservoir viscosities; while lifetime response improved with lower prior water cut. Field results confirm that the CO/sub 2/ huff 'n puff process recovers waterflood residual oil, and that a second cycle can be successful.
- Research Organization:
- Louisiana State Univ.
- OSTI ID:
- 7200063
- Report Number(s):
- CONF-861080-
- Country of Publication:
- United States
- Language:
- English
Similar Records
An evaluation of CO/sub 2/ huff 'n' puff field tests in Texas
Effect of the Injection Pressure on Enhancing Oil Recovery in Shale Cores during the CO2 Huff-n-Puff Process When It Is above and below the Minimum Miscibility Pressure
Related Subjects
020300* -- Petroleum-- Drilling & Production
BENCH-SCALE EXPERIMENTS
CARBON DIOXIDE INJECTION
CORRELATIONS
ENERGY SOURCES
ENHANCED RECOVERY
FEDERAL REGION VI
FIELD TESTS
FLUID INJECTION
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
LOUISIANA
MINERAL RESOURCES
MISCIBLE-PHASE DISPLACEMENT
NORTH AMERICA
OIL WELLS
PERFORATION
PETROLEUM
PETROLEUM DEPOSITS
PETROLEUM FRACTIONS
PETROLEUM RESIDUES
RECOVERY
RESERVOIR PRESSURE
RESERVOIR TEMPERATURE
RESOURCES
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
STIMULATION
TESTING
USA
VISCOSITY
WELL STIMULATION
WELLS