Effects of chemical additives on microbial enhanced oil recovery processes
An extensive laboratory study has been conducted to determine (1) the role of the microbial cells and products in oil displacement, (2) the relative rates of transport of microbial cells and chemical products from the metabolism of nutrient in porous media, and (3) the effects of chemical additives on the oil recovery efficiency of microbial formulations. This report describes experiments relating to the effects of additives on oil recovery efficiency of microbial formulations. The effects of additives on the oil recovery efficiency of microbial formulations were determined by conducting oil displacement experiments in 1-foot-long Berea sandstone cores. Sodium tripolyphosphate (STPP), a low-molecular-weight polyacrylamide polymer, a lignosulfonate surfactant, and sodium bicarbonate were added to a microbial formulation at a concentration of 1%. The effects of using these additives in a preflush prior to injection of the microbial formulation were also evaluated. Oil-displacement experiments with and without a sodium bicarbonate preflush were conducted in 4-foot-long Berea sandstone cores, and samples of in situ fluids were collected at various times at four intermediate points along the core. The concentrations of metabolic products and microbes in the fluid samples were determined. 9 refs., 22 figs., 8 tabs.
- Research Organization:
- National Inst. for Petroleum and Energy Research, Bartlesville, OK (USA)
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- FC22-83FE60149
- OSTI ID:
- 5284479
- Report Number(s):
- NIPER-442; ON: DE90000204
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
ADDITIVES
ALKALI METAL COMPOUNDS
BUFFERS
CARBON COMPOUNDS
CARBONATES
CHLORIDES
CHLORINE COMPOUNDS
ENHANCED RECOVERY
HALIDES
HALOGEN COMPOUNDS
METABOLITES
MICROBIAL EOR
MICROORGANISMS
OXYGEN COMPOUNDS
RECOVERY
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SODIUM CARBONATES
SODIUM CHLORIDES
SODIUM COMPOUNDS
TRANSPORT