Use of tracers to monitor in situ miscibility of solvent in oil reservoirs during EOR
Patent
·
OSTI ID:5053969
This patent describes a method for monitoring in situ miscibility of a solvent with reservoir oil. It comprises selecting at least two tracers from the group consisting of halo-hydrocarbons, halocarbons, sulfur hexafluoride, tritium gas, radioactive isotopes of inert gases, and triated or carbon 14tagged hydrocarbons, the tracers being miscible with the solvent and having different boiling points; forming a mixture comprising the tracers and the solvent; injecting the mixture into an injection well; producing fluids from a production well in communication with the injection well; and analyzing the fluids for the presence of the tracers to determine solvent miscibility with the reservoir oil.
- Assignee:
- Exxon Production Research Co., Houston, TX (United States)
- Patent Number(s):
- A; US 5111882
- Application Number:
- PPN: US 7-711824
- OSTI ID:
- 5053969
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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400703 -- Radiochemistry & Nuclear Chemistry-- Radioisotope Production
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
DRILLING
ENHANCED RECOVERY
EXTRACTION
FLUID INJECTION
HYDROGEN ISOTOPES
INJECTION WELLS
ISOTOPE APPLICATIONS
ISOTOPES
LABELLED COMPOUNDS
LIGHT NUCLEI
MISCIBLE-PHASE DISPLACEMENT
MONITORING
MWD SYSTEMS
NUCLEI
ODD-EVEN NUCLEI
OIL WELLS
OPTIMIZATION
RADIOISOTOPES
SEPARATION PROCESSES
SOLVENT EXTRACTION
TRACER TECHNIQUES
TRITIUM
WELL DRILLING
WELLS
YEARS LIVING RADIOISOTOPES