El Dorado micellar-polymer demonstration project

Technical Report · Fri Feb 01 00:00:00 EST 1980

OSTI ID:5479808

Rosenwald, G W ^[1]

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1. ed.

The micellar fluid injection was completed in the north (Chesney) pattern, and injection of polymer soluttion was initiated. Polymer solution was injected into the south (Hegberg) pattern during the entire reporting period. The third step of the graded polymer injection design is nearing completion. Fluid movement at the observation wells has been monitored closely. Oil mobilization has been indicated by the detection of an oil bank moving past some of the observation wells in both patterns. No significant changes in fluid composition have occurred at the eight production wells during this reporting period. Three flow tests designed to define the optimal salinity for the north pattern polymer drive were made using El Dorado 650-ft Sandstone cores. Results of these tests indicated that a polymer drive with 1.0 wt %. NaCl in El Dorado lake water has the highest oil recovery efficiency. The pressures in the project monitoring wells were measured four times. Two sets of pressure transient tests were conducted to determine the extent of a hydraulic fracture of well MP-213; these tests also involved wells MP-226 and MP-227. An extensive discussion of the west-to-east pressure gradient observed in the field was presented last year. Data indicate the gradient still exists. Computations show that the gradient cannot be caused by the degree of reservoir heterogeneity thought to exist in the El Dorado reservoir. Although the cause of the gradient remains unexplained, its adverse impact on ultimate oil recovery could be significant and should be considered in future performance modeling. An estimate of recovery efficiency was made based on the updated calculations and the data taken for the one-foot interval at well MP-131. These preliminary results showed about 40% displacement efficiency.

• Research Organization: Cities Service Co., Tulsa, OK (USA); Department of Energy, Bartlesville, OK (USA). Bartlesville Energy Technology Center
• DOE Contract Number: ET-78-C-03-1800
• OSTI ID: 5479808
• Report Number(s): DOE/ET/13070-53
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
MICROEMULSION FLOODING
DEMONSTRATION PROGRAMS
OIL WELLS
ENHANCED RECOVERY
INJECTION WELLS
KANSAS
PETROLEUM
WELL STIMULATION
ENERGY SOURCES
FLUID INJECTION
FOSSIL FUELS
FUELS
MIDWEST REGION
MISCIBLE-PHASE DISPLACEMENT
NORTH AMERICA
USA
WELLS
020300* - Petroleum- Drilling & Production