Polymer containing pendant silyl ether groups useful in enhanced oil recovery using CO sub 2 flooding
This patent describes improvement in a method for recovering oil from an underground oil-bearing earth formation penetrated by an injection well and a producing well, in which method carbon dioxide is injected into the formation to displace oil towards the producing well from which oil is produced to the surface. The improvement comprises injecting into the formation carbon dioxide, the viscosity of which is increased at least three- fold by the presence of a sufficient amount of a polymer containing pendant groups selected from the group consisting of silyl ether groups and polydialkylsiloxane groups and a sufficient amount of a cosolvent to form a solution of the polymer in the carbon dioxide, wherein the minimum solubility parameter of the polymer is reduced to 6.85 (cal/cc){sup 1/2} or less by control of the number of pendant groups and by the selection of the pendant groups.
- Assignee:
- Chevron Research Co., San Francisco, CA (United States)
- Patent Number(s):
- US 5022467; A
- Application Number:
- PPN: US 7-138268
- OSTI ID:
- 6005052
- Resource Relation:
- Patent File Date: 23 Dec 1987
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DISPLACEMENT FLUIDS
CHEMICAL COMPOSITION
OIL WELLS
PETROLEUM
ENHANCED RECOVERY
CARBON DIOXIDE INJECTION
CHEMICAL REACTION KINETICS
ETHERS
FLUID INJECTION PROCESSES
INJECTION WELLS
POLYMERS
SOLUBILITY
ENERGY SOURCES
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
KINETICS
MISCIBLE-PHASE DISPLACEMENT
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
REACTION KINETICS
RECOVERY
WELLS
020300* - Petroleum- Drilling & Production
400201 - Chemical & Physicochemical Properties