Improved CO sub 2 enhanced oil recovery -- Mobility control by in-situ chemical precipitation
The overall objective of this study has been to evaluate the feasibility of chemical precipitation to improve CO{sub 2} sweep efficiency and mobility control. The laboratory experiments have indicated that carbonate precipitation can alter the permeability of the core samples under reservoir conditions. Furthermore, the relative permeability measurements have revealed that precipitation reduces the gas permeability in favor of liquid permeability. This indicates that precipitation is occurring preferentially in the larger pores. Additional experimental work with a series of connected cores have indicated that the permeability profile can be successfully modified. However, Ph control plays a critical role in propagation of the chemical precipitation reaction. A numerical reservoir model has been utilized to evaluate the effects of permeability heterogeneity and permeability modification on the CO{sub 2} sweep efficiency. The computer simulation results indicate that the permeability profile modification can significantly enhance CO{sub 2} vertical and horizontal sweep efficiencies. The scoping studies with the model have further revealed that only a fraction of high permeability zones need to be altered to achieve sweep efficiency enhancement. 64 refs., 30 figs., 16 tabs.
- Research Organization:
- West Virginia Univ., Morgantown, WV (USA). Dept. of Petroleum and Natural Gas Engineering
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC21-85MC22044
- OSTI ID:
- 5614387
- Report Number(s):
- DOE/MC/22044-15; ON: DE91002243
- Country of Publication:
- United States
- Language:
- English
Similar Records
Improved CO/sub 2/ enhanced oil recovery mobility control by in-situ chemical precipitation: Annual report for the period September 1985 to September 1986
PH Sensitive Polymers for Improving Reservoir Sweep and Conformance Control in Chemical Flooring
Related Subjects
CARBON DIOXIDE INJECTION
SWEEP EFFICIENCY
CARBONATES
PRECIPITATION
OPTIMIZATION
BARIUM CHLORIDES
CALCIUM CHLORIDES
HETEROGENEOUS EFFECTS
MATHEMATICAL MODELS
PERMEABILITY
PETROLEUM
PROGRESS REPORT
RESERVOIR ROCK
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CARBON COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
DOCUMENT TYPES
ENERGY SOURCES
FLUID INJECTION
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
MISCIBLE-PHASE DISPLACEMENT
OXYGEN COMPOUNDS
SEPARATION PROCESSES
020300* - Petroleum- Drilling & Production