IP Library Granted Patent US 10,145,225
Granted Patent B2
US 10,145,225 · App. 15/205,129 · Granted Dec 4, 2018

Later stage hydrocarbon production processes

Inventors: Julio Sanchez (Calgary, CA); Jason Russell Bruce Dickson (Calgary, CA); Sergio Merchan (Calgary, CA)
Assignee: NEXEN ENERGY ULC
E21B43/2406E21B43/20E21B43/2408E21B43/305E21B47/065
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Quick Facts
Patent No.
US 10,145,225
App. No.
15/205,129
Granted
Dec 4, 2018
Kind
B2
Abstract

A hydrocarbon production process comprising operating a first early stage hydrocarbon production process within a first communication domain with a first well pair, and operating a second early stage hydrocarbon production process within a second communication domain with a second well pair, such that an intermediate reservoir region including stranded bitumen becomes disposed between the first and second communication domains; wherein the first early stage hydrocarbon production process includes injecting a first production-initiating fluid via a first injection well of the first well pair into a first communication domain such that hydrocarbon material is mobilized and conducted to a first production well of the first well pair, and producing the received hydrocarbon material via the first production well; and wherein the second early stage hydrocarbon production process includes injecting a second production-initiating fluid via a second injection well of the second well pair into a second communication domain such that hydrocarbon material is mobilized and conducted to a second production well of the second well pair, and producing the received hydrocarbon material via the second production well; selecting a pre-selected zone within the reservoir, wherein the selecting is based upon temperature fall-off data within the first and second communication zones; and positioning a portion of an infill well within the pre-selected zone for receiving mobilized hydrocarbon material of at least the intermediate reservoir region and for producing the received hydrocarbon material.

Claims (52)

1. A hydrocarbon production process comprising:

operating an early stage hydrocarbon production process with a first well pair within a reservoir, wherein the early stage hydrocarbon production process includes injecting a production-initiating fluid via an injection well of the first well pair into a communication domain such that hydrocarbon material is mobilized and conducted to a production well of the first well pair, and producing the mobilized hydrocarbon, that has been received by the production well, via the production well;

selecting a pre-selected zone within the reservoir based upon temperature fall-off data within the communication domain; and

positioning a portion of an infill well within the pre-selected zone for receiving mobilized hydrocarbon material of at least a flanking region, that is spaced apart from and flanking the communication domain, and for producing the received hydrocarbon material.

2. The hydrocarbon production process as claimed in claim 1 , further comprising:

sampling for temperature fall-off data upon which the selecting is based.

3. The hydrocarbon production process as claimed in claim 1 ;

wherein the pre-selected zone is selected externally of the communication domain.

4. The hydrocarbon production process as claimed in claim 1 ;

wherein the pre-selected zone is selected from within the flanking region.

5. The hydrocarbon production process as claimed in claim 1 ;

wherein the infill well includes a horizontal section, and wherein the pre-selected zone-disposed portion is disposed within the horizontal section;

wherein the selecting is such that, after the infill well portion becomes disposed within the pre-selected zone, the pre-selected zone-disposed portion of the infill well is closer to the production well than is at least 75% of the other portions of the horizontal section of the infill well; and

wherein for at least 75% of the axial length of the horizontal section of the infill well that is other than the pre-selected zone-disposed portion of the infill well, the minimum distance, by which each one of the portions of the at least 75% of the axial length of the horizontal section of the infill well, independently, is spaced apart from the production well, is greater than the minimum distance by which the pre-selected zone-disposed portion of the infill well is spaced apart from the production well by at least 10%.

6. The hydrocarbon production process as claimed in claim 1 ;

wherein the pre-selected zone-disposed portion of the infill well is defined within a hook portion of the infill well, wherein the hook portion is oriented in a direction towards the production well.

7. A hydrocarbon production process comprising:

operating an early stage hydrocarbon production process with a first well pair within a reservoir, wherein the early stage hydrocarbon production process includes injecting a first production-initiating fluid via an injection well of the first well pair into a communication domain such that hydrocarbon material is mobilized and conducted to a production well of the first well pair, and producing the mobilized hydrocarbon, that has been received by the production well, via the production well;

selecting a pre-selected zone from two or more zones within the reservoir, wherein the selecting is based upon a determination that the pre-selected zone has a rate of cooling that is slower than the other ones of the two or more zones; and

positioning a portion of an infill well within the pre-selected zone for receiving mobilized hydrocarbon material of at least a flanking region, that is spaced apart from and flanking the communication domain, and for producing the received hydrocarbon material.

8. The hydrocarbon production process as claimed in claim 7 ;

wherein each one of the two or more zones, independently, is disposed externally of the communication domain.

9. The hydrocarbon production process as claimed in claim 7 ;

wherein each one of the two or more zones, independently, is disposed within the flanking region.

10. The hydrocarbon production process as claimed in claim 9 ;

wherein the infill well is disposed within the flanking region.

11. The hydrocarbon production process as claimed in claim 7 , further comprising:

sampling for temperature fall-off data upon which the determination is based.

12. The hydrocarbon production process as claimed in claim 7 ;

wherein the infill well includes a horizontal section, and wherein the pre-selected zone-disposed portion is disposed within the horizontal section;

wherein the selecting is such that, after the infill well portion becomes disposed within the pre-selected zone, the pre-selected zone-disposed portion of the infill well is closer to the production well than is at least 75% of the other portions of the horizontal section of the infill well; and

wherein for at least 75% of the axial length of the horizontal section of the infill well that is other than the pre-selected zone-disposed portion of the infill well, the minimum distance, by which each one of the portions of the at least 75% of the axial length of the horizontal section of the infill well, independently, is spaced apart from the production well, is greater than the minimum distance by which the pre-selected zone-disposed portion of the infill well is spaced apart from the production well by at least 10%.

13. The hydrocarbon production process as claimed in claim 7 ;

wherein the pre-selected zone-disposed portion of the infill well is defined within a hook portion of the infill well, wherein the hook portion is oriented in a direction towards the production well.

14. A hydrocarbon production process comprising:

operating an early stage hydrocarbon production process with a first well pair within a reservoir, wherein the early stage hydrocarbon production process includes injecting a first production-initiating fluid via an injection well of the first well pair into a communication domain such that hydrocarbon material is mobilized and conducted to a production well of the first well pair, and producing the mobilized hydrocarbon, that has been received by the production well, via the production well;

selecting a pre-selected zone from two or more zones within the reservoir, wherein the selecting is based upon a determination that the pre-selected zone is disposed at a higher temperature than the other ones of the two or more zones; and

positioning a portion of an infill well within the pre-selected zone for receiving mobilized hydrocarbon material of at least a flanking region, that is spaced apart from and flanking the communication domain, and for producing the received hydrocarbon material.

15. The hydrocarbon production process as claimed in claim 14 ;

wherein each one of the two or more zones, independently, is disposed externally of the communication domain.

16. The hydrocarbon production process as claimed in claim 14 ;

wherein each one of the two or more zones, independently, is disposed within the flanking region.

17. The hydrocarbon production process as claimed in claim 16 ;

wherein the infill well is disposed within the flanking region.

18. The hydrocarbon production as claimed in claim 14 , further comprising:

sensing temperature within a plurality of zones within the reservoir for effecting the determination that the pre-selected zone is disposed at a higher temperature than the other ones of the two or more zones.

19. The hydrocarbon production process as claimed in claim 14 ;

wherein the infill well includes a horizontal section, and wherein the pre-selected zone-disposed portion is disposed within the horizontal section;

wherein the selecting is such that, after the infill well portion becomes disposed within the pre-selected zone, the pre-selected zone-disposed portion of the infill well is closer to the production well than is at least 75% of the other portions of the horizontal section of the infill well; and

wherein for at least 75% of the axial length of the horizontal section of the infill well that is other than the pre-selected zone-disposed portion of the infill well, the minimum distance, by which each one of the portions of the at least 75% of the axial length of the horizontal section of the infill well, independently, is spaced apart from the production well, is greater than the minimum distance by which the pre-selected zone-disposed portion of the infill well is spaced apart from the production well by at least 10%.

20. The hydrocarbon production process as claimed in claim 14 ;

wherein the pre-selected zone-disposed portion of the infill well is defined within a hook portion of the infill well, wherein the hook portion is oriented in a direction towards the production well.

Assignments (2)
CHANGE OF NAME Recorded Feb 19, 2019
From: NEXEN ENERGY ULC
To: CNOOC PETROLEUM NORTH AMERICA ULC
Reel/Frame 048366/0576 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 11, 2018
From: SANCHEZ, JULIO; DICKSON, JASON RUSSELL BRUCE; MERCHAN, SERGIO
To: NEXEN ENERGY ULC
Reel/Frame 045502/0483 →
Priority Claims (1)
CA 2896754 · Jul 10, 2015 · national
Continuity (2)
Provisional Application 62191046 · Jul 10, 2015
Related Publication 20170009562A1 · Jan 12, 2017