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US 9,810,049 B2Granted
Systems and methods for inline chemical injection for dump flood water injectors
AssigneeChevron U.S.A. Inc.
InventorsRobert Matthew Dean, Varadarajan Dwarakanath, Taimur Malik, Will Sherman Slaughter, Dustin L. Walker
Life of this patent
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Abstract
The present disclosure provides techniques for inline injection of water and chemicals for a dump flood. The techniques include collecting water from a source reservoir into a water collection zone of an adjacent water injection well, and injecting a chemical solution into the water injection well. The water and the chemical solution are then mixed downhole in a mixer, such as a static mixer. The mixed injection fluid is then directly injected into an adjacent target reservoir.
Claims23
A method of inline water injection, comprising:
- collecting water from a source reservoir into a water collection zone of an injection well, wherein the injection well is in fluid communication with the source reservoir and a target reservoir, wherein the injection well is drilled into a formation, and wherein the source reservoir and the target reservoir are different reservoirs in the formation;
- injecting the water from the source reservoir through a static mixer, wherein the static mixer is disposed in the injection well and the static mixer is intended to remain in the injection well for an economic life of the injection well;
- delivering and injecting a concentrated chemical solution from a source outside of the injection well into the static mixer while injecting the water from the source reservoir through the static mixer;
- mixing the water from the source reservoir and the concentrated chemical solution in the static mixer, resulting in an injection fluid;
- injecting the injection fluid into the target reservoir to mobilize hydrocarbons in the target reservoir towards a producing well;
- and
- recovering the hydrocarbons mobilized by the injection fluid from the producing well.
4 more elements
An inline water injection system, comprising:
- a first packer disposed within an injection well at a first level, wherein the injection well is drilled into a formation;
- a second packer disposed within the injection well at a second level below the first packer, wherein the injection well comprises a water collection zone between the first packer and the second packer;
- a static mixer disposed within the injection well and the static mixer is intended to remain in the injection well for an economic life of the injection well;
- and
- one or more injection tubings disposed within the injection well traversing the first and second packers, wherein the one or more injection tubings deliver water from an adjacent source reservoir and a chemical solution from an above-ground source into the static mixer, wherein the static mixer mixes the water from the source reservoir and the chemical solution into an injection fluid, and wherein the injection fluid is injected into a target reservoir adjacent the injection well to mobilize hydrocarbons in the target reservoir towards a producing well for recovering the hydrocarbons mobilized by the injection fluid from the producing well, and wherein the source reservoir and the target reservoir are different reservoirs in the formation.
2 more elements
A method of inline water injection, comprising:
- pumping a concentrated chemical solution into an injection tubing, wherein the injection tubing is disposed within an injection well, and wherein the injection well is drilled into a formation;
- collecting water from a source reservoir into the injection tubing, wherein the injection well is in fluid communication with the source reservoir, and wherein the source reservoir is in the formation;
- injecting the concentrated chemical solution and the water from the source reservoir through a mixer disposed in the injection well, wherein the static mixer is intended to remain in the injection well for an economic life of the injection well, and wherein the concentrated chemical solution and the water from the source reservoir are mixed into an injection fluid;
- injecting the injection fluid into a target reservoir in fluid communication with the injection well to mobilize hydrocarbons in the target reservoir towards a producing well, wherein the target reservoir is in the formation, and wherein the source reservoir and the target reservoir are different reservoirs in the formation;
- and
- recovering the hydrocarbons mobilized by the injection fluid from the producing well.
3 more elements
Dependencies are inferred from the claim text.