Granted Patent B2

US 12,428,928 · App. 18/935,061 · Granted Sep 30, 2025

Inventors: Francois-Xavier Dubost (Paris, FR); Magdy Samir Osman (Bucharest, RO); Ashers Partouche (Katy, TX); Morten Kristensen (Lysaker, NO); Hadrien Dumont (Paris, FR); Adriaan Gerard Gisolf (Bucharest, RO)

Assignee: Schlumberger Technology Corporation

E21B33/124E21B17/021E21B17/023E21B23/06E21B33/122E21B47/11E21B49/008E21B49/083

Abstract

Claims (54)

1. A process, comprising:

placing the downhole apparatus at a desired station depth within a wellbore;

attaching a cable to the downhole apparatus from an up-hole environment;

performing a first test of a saturation level of geological stratum at the desired station depth;

setting a dual packer to seal a space between at least a portion of the downhole apparatus and an inner surface of the wellbore;

introducing a fluid to the downhole apparatus through the drill pipe;

circulating at least a portion of the fluid through a first line from a circulating sub to a bottom outlet;

creating a suction in a dual packer interval from an upper inlet into a secondary flowline, using a pump located in the apparatus and in fluid communication with the secondary flowline;

replacing at least a portion of fluid from the dual packer interval with the portion of fluid circulated;

using a pump to inject at least a portion of the fluid from the downhole apparatus into a geological stratum at the desired station depth;

performing a second test of the saturation level of geological stratum at the desired depth; and

determining a change in the saturation level from the first test to the second test.

2. The process according to claim 1 , wherein the wellbore is an open-hole environment.

3. The process according to claim 1 , wherein the wellbore is a cased-hole environment.

4. The process according to claim 1 , wherein the downhole apparatus is a wireline apparatus.

5. The process according to claim 1 , wherein the fluid is one of a liquid and slurry.

6. The process according to claim 1 , wherein the fluid may comprise an acid, a proppant, an emulsifier, one or more hydrocarbons, a surfactant, a tracer, carbon dioxide, nitrogen, or a mixture thereof.

7. The process according to claim 1 , wherein the at least a portion of the fluid is injected with a pump located at earth's surface.

8. The process according to claim 1 , wherein the at least a portion of the fluid is injected with a pump in the downhole apparatus.

9. A process, comprising:

positioning a downhole apparatus on a drill pipe;

placing the downhole apparatus at a desired station depth within a wellbore;

attaching a cable to the downhole apparatus from an up-hole environment;

performing a first geological stratum test at the desired station depth;

setting a dual packer to seal a space between at least a portion of the downhole apparatus and an inner surface of the wellbore;

introducing a fluid to the downhole apparatus through the drill pipe, wherein the fluid includes both a drill fluid and one of a fresh water volume and a brine volume, the one of the fresh water volume and the brine volume in a pill;

circulating at least a portion of the fresh water volume and the brine volume through a first line from a circulating sub to a bottom outlet;

creating a suction in a dual packer interval from an upper inlet into a secondary flowline;

replacing at least a portion of fluid from the dual packer interval with the portion of fresh water volume and brine volume;

using a pump located on the downhole apparatus to inject at least a portion of the fluid from the downhole apparatus into a geological stratum at the desired station depth;

performing a second geological stratum test at the desired station depth; and

determining a change from the first test to the second test.

10. The process according to claim 9 , wherein the dual packer comprises at least a first packer and a second packer longitudinally spaced apart from one another on the downhole apparatus, and wherein, once set, the first and second packers provide a sealed volume therebetween.

11. The process according to claim 9 , wherein the downhole apparatus is a wireline apparatus.

12. The process according to claim 9 , where a volume of the fluid injected into the geological stratum is at least 23 L.

13. The process according to claim 9 , wherein the fluid is a liquid.

14. The process according to claim 9 , wherein the at least a portion of the fluid is injected with a pump located at earth's surface.

15. The process according to claim 9 , wherein the at least a portion of the fluid is injected with a pump in the downhole apparatus.

16. The process according to claim 9 , wherein the liquid comprises at least one of an acid, a proppant, an emulsifier, one or more hydrocarbons, a surfactant, a tracer, or a mixture thereof.

17. The process according to claim 9 , wherein the fluid further comprises a gas.

18. The process according to claim 17 , wherein the gas is an inert gas.

19. The process according to claim 17 , wherein the inert gas is one of carbon dioxide and nitrogen.

20. A process, comprising:

placing the downhole apparatus at a desired station depth within a wellbore;

attaching a cable to the downhole apparatus from an up-hole environment;

performing a first geological stratum test at the desired station depth;

setting a dual packer to seal a space between at least a portion of the downhole apparatus and an inner surface of the wellbore;

introducing a fluid to the downhole apparatus through the drill pipe, wherein the fluid includes both a drill fluid and one of a fresh water volume and a brine volume, the one of the fresh water volume and the brine volume in a pill;

circulating at least a portion of the fresh water volume and the brine volume through a first line from a circulating sub to a bottom outlet;

creating a suction in a dual packer interval from an upper inlet into a secondary flowline;

replacing at least a portion of fluid from the dual packer interval with the portion of fresh water volume and brine volume;

using a pump in the downhole apparatus to inject at least a portion of the fluid from the downhole apparatus into a geological stratum at the desired station depth;

performing a second geological stratum test at the desired station depth during presence of the pill at a site of the stratum test; and

determining a change from the first test to the second test.

Continuity (2)

References Cited (42)