Polymer containing pendant vinyl ether groups useful in enhanced oil recovery using
This patent describes an 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. It 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 polymer containing pendant vinyl ether 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)1/1/2 or less by control of the number of pendant vinyl ether groups and by the selection of the vinyl ether groups.
- Assignee:
- Chevron Research Co., San Francisco, CA (USA)
- Patent Number(s):
- US 4945990; A
- Application Number:
- PPN: US s 7-138225
- OSTI ID:
- 6471131
- Resource Relation:
- Patent File Date: 24 Dec 1987
- Country of Publication:
- United States
- Language:
- English
Similar Records
Polymer containing pendant tertiary alkyl amine groups useful in enhanced oil recovery using
Organosilicon polymer having nonrandom crosslinkages useful in enhanced oil recovery using carbon dioxide flooding
Related Subjects
DISPLACEMENT FLUIDS
CHEMICAL COMPOSITION
OIL WELLS
CARBON DIOXIDE INJECTION
ENHANCED RECOVERY
ETHERS
POLYVINYLS
WELL STIMULATION
FLUID INJECTION
FLUIDS
MISCIBLE-PHASE DISPLACEMENT
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
POLYMERS
RECOVERY
STIMULATION
WELLS
020300* - Petroleum- Drilling & Production