Multi-component downhole treatment

Patent metadata

Field	Value
Publication number	US-11732535-B2
Application number	US-202016834076-A
Country	US
Kind code	B2
Filing date	Mar 30, 2020
Priority date	Jun 13, 2019
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A downhole treatment system, apparatus, and methods are disclosed. In some embodiments a treatment apparatus includes a first conduit configured to transport a first fluid from a first fluid source through a first enclosed channel to a first outlet. A second conduit is configured to transport a second fluid from a second fluid source through a second enclosed channel to a second outlet. The treatment apparatus further comprises a mixing applicator that includes the first outlet positioned to provide a discharge path for the first fluid that at least partially intersects a flow path of the second fluid within a confluence region within or external to the second conduit.

First claim

What is claimed is:

1. A downhole treatment apparatus comprising:
a first conduit configured to transport a first fluid from a first fluid source at a surface of a wellbore through a first enclosed channel to a first outlet positioned in the wellbore;
a second conduit configured to transport a second fluid from a second fluid source at the surface of the wellbore through a second enclosed channel to a second outlet positioned in the wellbore;
a data processing system comprising a treatment procedure database, wherein the data processing system is configured to:
select, via the treatment procedure database, a treatment procedure from a plurality of treatment procedures, wherein the selected treatment procedure includes relative fluid concentrations and reaction periods;
request downhole parameters from one or more downhole sensors; and
generate one or more fluid component transport and mixing schedules based, at least in part, on the downhole parameters and the reaction periods; and

a mixing applicator that includes the first outlet positioned to provide a discharge path for the first fluid that at least partially intersects a flow path of the second fluid within a confluence region within the second conduit or in the wellbore.

2. The downhole treatment apparatus of claim 1 , further comprising a coiled tubing tool string within which the second conduit is coextensively disposed in substantially parallel proximity with respect to the first conduit.

3. The downhole treatment apparatus of claim 1 , wherein the first conduit is coextensively disposed within the second conduit.

4. The downhole treatment apparatus of claim 3 , wherein the mixing applicator comprises an internal mixing sub in which the first outlet comprises one or more orifices in the first conduit and the second outlet comprises one or more orifices in the second conduit downstream of the one or more orifices in the first conduit.

5. The downhole treatment apparatus of claim 4 , wherein each of the one or more orifices in the first conduit have a smaller surface area than a flow area through the first conduit.

6. The downhole treatment apparatus of claim 1 , wherein the mixing applicator is included in a treatment tool on a tool string and is configured to discharge combined fluid components from the confluence region to a region external to the treatment tool.

7. The downhole treatment apparatus of claim 1 , further comprising:
at least one flow control device configured to control flow of the first fluid through the first conduit and to control flow of the second fluid through the second conduit; and
a flow control system configured to operate said at least one flow control device based, at least in part, on a downhole parameter and a treatment procedure.

8. The downhole treatment apparatus of claim 7 , wherein the at least one flow control device comprises:
a first pump having an input port that receives the first fluid and an output port coupled to an inlet of the first conduit; and
a second pump having an input port that receives the second fluid and an output port coupled to an inlet of the second conduit.

9. The downhole treatment apparatus of claim 1 , wherein the mixing applicator includes a pressure-sensitive flow control component that blocks flow to the first outlet when a fluid pressure within the first conduit is below a threshold pressure.

10. The downhole treatment apparatus of claim 9 , wherein the pressure-sensitive flow control component comprises a pressure-sensitive flapper valve, a pressure-sensitive spring valve, or a pressure-sensitive rupture disk valve.

11. A method for applying a multi-component treatment, said method comprising:
selecting, via a data processing system comprising a treatment procedure database, a treatment procedure from the treatment procedure database, wherein the selected treatment procedure includes relative fluid concentrations and reaction periods;
requesting, via the data processing system, downhole parameters from one or more downhole sensors;
generating, via the data processing system, one or more fluid component transport and mixing schedules based, at least in part, on the downhole parameters and the reaction periods;
transporting a first fluid from a surface of a wellbore through a first conduit to a first outlet positioned in the wellbore;
transporting a second fluid from the surface of the wellbore through a second conduit to a second outlet positioned in the wellbore; and
combining the first and second fluids within a confluence region within the second conduit or in the wellbore after passing through a mixing applicator located downhole that includes at least a portion of a discharge flow path from the first outlet, wherein the mixing applicator includes a pressure-sensitive flow control component that blocks flow to the first outlet when a fluid pressure of the first conduit is below a threshold pressure;
determining that one or more of the downhole parameters have exceeded a threshold; and
adjusting the one or more fluid component transport and mixing schedules based on the one or more downhole parameters that have exceeded the threshold.

12. The method of claim 11 , wherein the first conduit and the second conduit are included in an injection string having the mixing applicator that includes the first outlet and the second outlet.

13. The method of claim 11 , wherein the first and second fluids are loaded within the first and second conduits prior to initiation of downhole mixing during a treatment operation.

14. The method of claim 11 , wherein said transporting the first and second fluids comprises:
transporting a volume of the first fluid based on a treatment procedure; and
transporting a volume of the second fluid based on the treatment procedure.

15. The method of claim 14 , wherein said transporting the volume of the first fluid comprises pumping the first fluid at a first rate, and wherein said transporting the volume of the second fluid comprises pumping the second fluid at a second rate determined based, at least in part, on the first rate.

16. The method of claim 14 , wherein said combining the first and second fluids includes discharging the first fluid from the first outlet that is disposed in the confluence region within or external to the second conduit.

17. The method of claim 14 , wherein selecting the treatment procedure from the treatment procedure database comprises:
receiving a treatment request; and
selecting the treatment procedure from the treatment procedure database in response to the treatment request.

18. The method of claim 17 , wherein the downhole parameter is at least one of the fluid pressure of the first conduit, a fluid pressure of the second conduit, and a downhole temperature.

19. The method of claim 17 , wherein said transporting the volume of the second fluid based on the treatment procedure comprises initiating or terminating transport of the second fluid relative to initiating or terminating transport of the first fluid based, at least in part, on the transport and mixing schedule.

20. The method of claim 17 , further comprising mixing the first and second fluids at a point during a treatment operation based on the transport and mixing schedule.

Assignees

• Halliburton Energy Services Inc

Inventors

• Quero Philippe
• Bivens Eric

Classifications

• E21B17/18 Primary

  Pipes provided with plural fluid passages {(E21B17/203 takes precedence)} · CPC title

• E21B17/203

  with plural fluid passages · CPC title

• E21B43/16

  Enhanced recovery methods for obtaining hydrocarbons · CPC title

• E21B43/166

  Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium (CO2 injection E21B43/164; steam injection E21B43/24) · CPC title

• E21B33/14

  for cementing casings into boreholes · CPC title