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BR-112022012759-B1 - WELL-DOWN TOOL, METHOD AND SYSTEM

BR112022012759B1BR 112022012759 B1BR112022012759 B1BR 112022012759B1BR-112022012759-B1

Abstract

DOWNHOLE TOOL, METHOD AND SYSTEM. A downhole tool comprises at least one inlet and a first pump coupled to at least one inlet via a first flow line. The first pump is for pumping at a first pump rate to extract fluid through at least one inlet from a subsurface formation in which a well is created and in which the downhole tool is to be positioned. A sample chamber is coupled to the inlet via a second flow line, and a second pump is coupled to the inlet via the second flow line. The second pump is for pumping at a second pump rate to extract fluid through at least one inlet from the subsurface formation and for storage in the sample chamber. The first pump rate is higher than the second pump rate.

Inventors

  • CHRISTOPHER MICHAEL JONES
  • ANTHONY HERMAN VAN ZUILEKOM
  • DARREN GEORGE GASCOOKE

Assignees

  • HALLIBURTON ENERGY SERVICES, INC

Dates

Publication Date
20260310
Application Date
20201214
Priority Date
20201211

Claims (20)

  1. 1. Downhole tool, characterized in that it comprises: - a single split-flow probe comprising a first inlet (304) and a second inlet (304); - a first pump (202, 206, 210) coupled directly to the first inlet (304) via a first flow line (260, 261, 262), the first pump (202, 206, 210) configured to pump at a first pump rate to extract fluid through the first inlet (304) from a subsurface formation (250) in which a well is created and in which the downhole tool (200, 300, 400, 500, 600, 700) is configured to be positioned; - a second pump (202, 206, 210) coupled to the second inlet, the second pump (202, 206, 210) coupled directly to the second inlet via a second flow line (260, 261, 262); wherein the second pump (202, 206, 210) is configured to pump at a second pump rate to extract fluid through the second inlet from the subsurface formation (250), wherein the first pump rate is a higher pump rate than the second pump rate; - a sample chamber (208) coupled to an outlet of the second pump (202, 206, 210) via a valve; and a fluid identification sensor (215) configured to monitor a level of a reagent present in the fluid; wherein the downhole tool (200, 300, 400, 500, 600, 700) is configured to open the valve (212, 214) in response to the fluid identification sensor (215) providing an indication that the level of the reagent present in the fluid is greater than a fluid reagent threshold and to allow the fluid sample to be collected in the sampling chamber; and wherein the downhole tool (200, 300, 400, 500, 600, 700) is further configured to interrupt the pumping of the fluid through the first pump (202, 206, 210) in response to the fluid identification sensor (215) providing an indication that the level of the reagent present in the fluid is greater than the fluid reagent threshold.
  2. 2. Downhole tool, according to claim 1, characterized in that the single split flow probe comprises a non-focused inlet coupled to the first pump (202, 206, 210) through the first flow line (260, 261, 262) and a focused sample probe (204) coupled to the second pump (202, 206, 210) through the second flow line (260, 261, 262).
  3. 3. Downhole tool, according to claim 1, characterized in that the first pump (202, 206, 210) is at a first distance from the single split flow probe and the second pump (202, 206, 210) is at a second distance from the single split flow probe, the first distance being greater than the second distance.
  4. 4. Downhole tool, according to claim 1, characterized in that the diameter of the first flow line (260, 261, 262) is larger than the diameter of the second flow line (260, 261, 262).
  5. 5. Downhole tool, according to claim 1, characterized in that the second flow line (260, 261, 262) is internally lined with an inert reactive component coating.
  6. 6. A downhole tool according to claim 5, characterized in that the reagent comprises hydrogen sulfide, and the inert reactive component coating comprises a nickel-cobalt based alloy.
  7. 7. A downhole tool according to claim 5, characterized in that the reagent comprises mercury, and the inert reactive component coating comprises aluminum oxide.
  8. 8. Downhole tool, according to claim 1, characterized in that the single split-flow probe comprises an external protective probe.
  9. 9. Downhole tool according to claim 1, characterized in that it further comprises: - a first packer (750, 752); and - a second packer (750, 752), wherein the single split-flow probe is positioned between the first packer (750, 752) and the second packer (750, 752).
  10. 10. Downhole tool according to claim 1, characterized in that the first inlet (304) and the second inlet (304) each comprise a non-focused inlet.
  11. 11. Downhole tool, according to claim 1, characterized in that the second pump (202, 206, 210) is constructed from a material that is inert to the reagent.
  12. 12. Downhole tool, according to claim 1, characterized in that a first flow path comprising the first flow line (260, 261, 262) and the first pump (202, 206, 210) comprises a first surface area that is larger than a second surface area of a second flow path comprising the second flow line (260, 261, 262) and the second pump (202, 206, 210).
  13. 13. Method, characterized by comprising: - positioning a downhole tool (200, 300, 400, 500, 600, 700) in a wellbore at a location from which fluid is to be extracted from a subsurface formation surrounding (250) the wellbore; - extracting the fluid from the subsurface formation through at least one inlet of the downhole tool (200, 300, 400, 500, 600, 700) using a first pump (202, 206, 210) that is coupled to at least one inlet through a first flow line (260, 261, 262), wherein the fluid initially extracted is composed of at least a portion of drilling fluid filtrate; - monitoring a level of a reagent in the fluid; In response to the determination that the reagent level in the fluid is greater than a fluid reagent threshold, - close a first valve (212, 214) in the first flow line (260, 261, 262) to stop the flow of fluid through the first flow line (260, 261, 262); - open a second valve (212, 214) in a second flow line (260, 261, 262) to allow the flow of fluid through the second flow line (260, 261, 262) based on pumping by a second pump (202, 206, 210) coupled to at least one inlet through the second flow line (260, 261, 262), wherein a pump rate of the first pump (202, 206, 210) is greater than a pump rate of the second pump (202, 206, 210); and to capture the fluid extracted from the subsurface formation and flow it through the second flow line (260, 261, 262) into a sample chamber.
  14. 14. Method according to claim 13, characterized in that at least one input comprises a probe.
  15. 15. Method according to claim 13, characterized in that it further comprises, in response to the determination that the reagent level in the fluid is greater than the fluid reagent threshold, activating the second pump (202, 206, 210).
  16. 16. Method according to claim 13, characterized in that a surface area of the first flow line (260, 261, 262) is larger than a surface area of the second flow line (260, 261, 262).
  17. 17. Method according to claim 13, characterized in that the distance from at least one inlet to the second pump (202, 206, 210) is greater than the distance from at least one inlet to the second pump (202, 206, 210).
  18. 18. Method according to claim 13, characterized in that a diameter of the first flow line (260, 261, 262) is larger than a diameter of the second flow line (260, 261, 262).
  19. 19. Method according to claim 13, characterized in that at least one inlet comprises a focused probe that includes a central probe and an outer protective probe, and wherein the extraction of fluid from the subsurface formation (250) via at least one inlet comprises the extraction of fluid from the central probe.
  20. 20. Method according to claim 19, characterized in that it further comprises extracting the fluid from the outer protective probe; and determining the fluid properties by means of pulsing the fluid over the outer protective probe.

Description

FUNDAMENTALS [0001] The disclosure generally refers to fluid sampling from a subsurface reservoir and, more particularly, to a split-flow probe for sampling a reactive downhole reservoir. [0002] Hydrocarbons, such as oil and gas, are commonly obtained from underground formations. The development of underground operations and the processes involved in removing hydrocarbons from an underground formation are complex. Typically, underground operations involve a series of different steps, such as, for example, drilling the wellbore at a desired well location, treating the wellbore to optimize hydrocarbon production, and carrying out the necessary steps to produce and process the hydrocarbons from the underground formation. [0003] In order to optimize the performance of hydrocarbon recovery operations, it may be advantageous to determine various formation characteristics, such as, for example, pressure and/or permeability. A formation tester can be used to determine formation characteristics. The formation tester is typically lowered into a well that traverses a formation of interest. A probe of the formation tester, usually comprising a pad or packer, can then be extended and placed in a sealed manner in fluid communication with the formation of interest. The formation fluid can then be extracted by the formation tester and various analyses can be performed on such fluid. BRIEF DESCRIPTION OF THE DRAWINGS [0004] The methods of disclosure can be better understood by reference to the attached drawings. [0005] FIG. 1A represents an illustrative system of logging during drilling (LWD), according to some modalities. [0006] FIG. 1B represents an illustrative steel cable system, according to some modalities. [0007] FIG. 2 represents an illustrative downhole tool that includes a split-flow focused probe for sampling a reactive reservoir, according to some embodiments. [0008] FIG. 3 represents an illustrative downhole tool that includes an example first oval split-flow probe for sampling a reactive reservoir, according to some embodiments. [0009] FIG. 4 represents an illustrative downhole tool that includes a second example oval split-flow probe for sampling a reactive reservoir, according to some embodiments. [0010] FIG. 5 represents an illustrative downhole tool that includes a split-flow juxtaposed probe system having two probes for sampling a reactive reservoir, according to some embodiments. [0011] FIG. 6 represents an illustrative downhole tool that includes a three-prong split-flow system for sampling a reactive reservoir, according to some embodiments. [0012] FIG. 7 represents an illustrative downhole tool that includes a split-flow packer system for sampling a reactive reservoir, according to some embodiments. [0013] FIG. 8 represents a flowchart of sampling operations from a reactive reservoir using a split-flow probe, according to some embodiments. [0014] FIG. 9 represents an example computer, according to some embodiments. DESCRIPTION [0015] The following description includes example systems, methods, techniques, and program flows that incorporate aspects of the disclosure. However, it is understood that this disclosure can be practiced without these specific details. For example, this disclosure refers to an input (e.g., a probe), which may be of multiple pad or packer designs, to extract fluids from a formation in illustrative examples. Aspects of this disclosure may also use any type of input that may include one or more inputs. In other cases, instances of well-known instruction, protocols, structures, and techniques have not been shown in detail so as not to obscure the description. [0016] Several embodiments refer to a downhole tool for formation sampling ("formation samplers"). Such a tool may include a probe to extract fluid from the surrounding subsurface formation. This extracted fluid can be analyzed to determine various formation characteristics. Some embodiments incorporate a split-flow or common flowline configuration from such a probe. In a split-flow configuration, a first flow may be used to clear the reservoir of drilling fluid filtrate at a rapid rate with a large-volume pump, while a second flow may be used to sample formation fluids (having reactive components) with a small-volume pump. Additionally, the probe may be focused or unfocused. [0017] Conventional formation samplers typically use a small, low-volume pump to sample formation fluid to determine levels or concentrations of reactive components (e.g., hydrogen sulfide, mercury, acid, etc.). Using such a setup, which extracts fluid at a low flow rate with a small-volume pump, can require a long time to remove drilling fluid filtrate from the formation. However, removal of drilling fluid filtrate needs to occur before sampling the formation fluid (including any reactive components therein). Furthermore, during sampling to capture reactive components, the amount of surface area on the formation sampler to which the reactive components