APPARATUS AND METHOD FOR TESTING AN OIL AND/OR GAS WELL WITH A MULTIPLE-STAGE COMPLETION

• US 20180363460A1
• Filed: 06/15/2017
• Published: 12/20/2018
• Est. Priority Date: 06/15/2017
• Status: Active Grant

• Current Assignee: Pursuit Techmologies Limited
• Original Assignee: Pursuit Techmologies Limited
• Inventors: Fitzel, Steve, Jellett, Dave, Coleman, Trevor, Thompson, Jeremy, Osadchuk, Karen
• Granted Patent: US 10,443,379 B2
• Time in Patent Office: Days
• CPC Class Codes: E21B 23/00 Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells setting of casings, screens or liners E21B43/10
• CPC Class Codes: E21B 33/12 Packers; Plugs used for cementing E21B33/134, E21B33/16
• CPC Class Codes: E21B 33/124 Units with longitudinally-spaced plugs for isolating the intermediate space
• CPC Class Codes: E21B 34/08 responsive to flow or pressure of the fluid obtained E21B34/10 takes precedence
• CPC Class Codes: E21B 47/06 Measuring temperature or pressure
• CPC Class Codes: E21B 47/07 Temperature
• CPC Class Codes: E21B 47/12 Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
• CPC Class Codes: E21B 49/084 with means for conveying samples through pipe to surface
• CPC Class Codes: E21B 49/087 Well testing, e.g. testing for reservoir productivity or formation parameters
• CPC Class Codes: E21B 49/0875 determining specific fluid parameters

Abstract

The present disclosure relates to testing tools that comprises: a cable-head assembly for connecting the testing tool to an end of a length of coiled tubing; a pump assembly comprising a downhole pump; an upper packer-assembly comprising an upper packer-element; a lower packer-assembly comprising a lower packer-element; a sensor assembly comprising one or more sensors with the sensor assembly positioned in fluid communication with a plenum between the upper and lower packer assemblies; and a testing port that is adjacent the sensor assembly. The testing tool is moveable between a first configuration where the upper and lower packer-elements are unset and a second position where the upper and lower packer-elements are set and the testing port is in fluid communication with the downhole pump. Methods of using the testing tools is also described.

Claims

1. A testing tool for testing individual stages of a well, the testing tool comprising:

an uphole end and a downhole end, the uphole end is operatively connectible to a coiled tubing string;

a downhole pump,

an upper packer-assembly and a lower packer-assembly;

a sensor assembly comprising one or more sensors, the sensor assembly is in fluid communication with a position between the two the packer assemblies and the downhole pump; and

a flow-through conduit for conducting fluids between the uphole end and the downhole end.

2. The testing tool of claim 1, wherein the uphole end comprises a cable-head assembly for controlling the flow of fluids therethrough.

3. The testing tool of claim 2, wherein the cable-head assembly comprises one or more shear elements that are releasably connectible to the coiled tubing string.

4. The testing tool of claim 1, wherein the uphole end comprises an electric release that is releasably connectible to the coiled tubing string.

5. The testing tool of claim 1, wherein the sensor assembly comprises one or more of the following sensors:

a telemetry package, a gamma-ray detector, a casing-collar locator, a temperature sensor, a fluid-capacitance sensor, a fluid-conductivity sensor, an optical sensor, a pressure sensor, an optical spectroscopy sensor, a sensor to measure ultrasonic speed, a magnetic resonance imaging sensor package, a radioactive density measurement sensor, a fluid-resistivity sensor, a sensor for measuring dielectric properties of the tested fluid, a tuning-fork vibration resonance sensor for measuring the density and viscosity of the tested fluid and combinations thereof.

6. The testing tool of claim 1, further comprising a first pressure-sensor that is positioned between the upper packer-assembly and the lower packer-assembly, a second pressure-sensor that is positioned uphole of the upper packing-assembly and a third pressure-sensor that is positioned below the lower packer-assembly.

7. The testing tool of claim 1, wherein the downhole end comprises a flow-control valve.

8. The testing tool of claim 7, wherein the upper packer-assembly and the lower packer-assembly are hydraulically actuated.

9. The testing tool of claim 7, wherein the upper packer-assembly comprises an upper packer element and the lower packer-assembly comprises a lower packer element, the upper and lower packer elements both comprise an internal plenum and actuation of the flow-control valve controls fluid communication between the internal plenums and the flow-through conduit.

10. The testing tool of claim 1, further comprising an equalization sub for releasing a negative pressure between the upper packer-assembly and the lower packer-assembly.

11. A method comprising steps of:

a. connecting a testing tool to one end of coiled tubing;

b. running the coiled tubing and the testing tool into a well;

c. positioning the testing tool substantially adjacent a first perforated section of the well;

d. setting a first packer element on one side of the first perforated section of the well and a second packer element on an opposite side of the desired perforated section;

e. establishing fluid communication between a sensor assembly of the testing tool and the first perforated section;

f. pumping fluid through a downhole pump of the testing tool at a first output parameter;

g. capturing fluid-property data and/or pressure data from test fluids as they are pumped towards the downhole pump; and

h. unsetting the packer elements.

12. The method of claim 11, wherein the capturing step captures fluid-property data and pressure data from the test fluids.

13. The method of claim 11, further comprising a step of stopping (i) the downhole pump and capturing further fluid-property and/or pressure data from the test fluids.

14. The method of claim 11, further comprising a step of positioning (j) the testing tool adjacent a second perforated section of the well following the step of unsetting the packer elements.

15. The method of claim 14, further comprising a step of repeating steps (a) through (g) following the step of positioning (j).

16. The method of claim 11, further comprising a step of circulating fluids through the coiled tubing and out of a downhole end of the testing tool.

17. The method of claim 11, further comprising a step of releasing the testing tool from the coiled tubing.

18. The method of claim 17, wherein the step of releasing comprises a step of providing electrical power to a release motor and separating an upper section of the testing tool from a lower section of the testing tool.