Canadian Patents Database / Patent 2869600 Summary

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(12) Patent Application: (11) CA 2869600
(54) English Title: THERMALLY ASSISTED GRAVITY DRAINAGE (TAGD)
(54) French Title: DRAINAGE PAR GRAVITE ACTIVE THERMIQUEMENT
(51) International Patent Classification (IPC):
  • E21B 43/24 (2006.01)
(72) Inventors (Country):
  • ROBERTS, BRUCE (Canada)
  • BEATTIE, DOUG (Canada)
  • HAMIDA, TAREK (Canada)
(73) Owners (Country):
  • ATHABASCA OIL CORPORATION (Canada)
(71) Applicants (Country):
  • ATHABASCA OIL CORPORATION (Canada)
(74) Agent: HICKS & ASSOCIATES
(45) Issued:
(22) Filed Date: 2014-10-31
(41) Open to Public Inspection: 2016-04-30
Examination requested: 2017-10-02
(30) Availability of licence: N/A
(30) Language of filing: English

English Abstract



A method for producing bitumen or heavy oil from a reservoir, the method
comprising:
defining at least one lateral section of the reservoir for placement of
patterns of heater
wells above a producer well; placing the producer well at a substantially
centered
location at or adjacent to the bottom of the reservoir within each of the
lateral sections;
placing a triangular pattern of heater wells above the producer well; placing
a regular or
non-regular pentagonal pattern of heater wells, or a portion thereof, at or
above the
triangular pattern of heater wells; heating the reservoir with the triangular
and
pentagonal patterns of heater wells to conductively heat the reservoir and
reduce the
viscosity of the bitumen or heavy oil; and producing bitumen or heavy oil with
the
producer well.


Note: Claims are shown in the official language in which they were submitted.


CLAIMS

1. A method for producing bitumen or heavy oil from a reservoir, the method
comprising:
a) defining at least one lateral section of the reservoir for placement of
patterns of
heater wells above a producer well;
b) placing the producer well at a substantially centered location at or
adjacent to the
bottom of the reservoir within each of the lateral sections;
c) placing a triangular pattern of heater wells above the producer well;
d) placing a regular or non-regular pentagonal pattern of heater wells, or a
portion
thereof, at or above the triangular pattern of heater wells;
e) heating the reservoir with the triangular and pentagonal patterns of heater
wells
to conductively heat the reservoir and reduce the viscosity of the bitumen or
heavy oil; and
f) producing bitumen or heavy oil with the producer well.
2. The method of claim 1 wherein the triangular pattern is arranged with a
lowermost
vertex located above and substantially aligned with the producer well and the
heater
wells of the remaining two higher vertices of the triangular pattern are
contained within
the boundaries of the lateral section at substantially the same level above
the lowermost
vertex of the triangular pattern.
3. The method of claim 2 wherein an additional heater well is placed
substantially
centrally within the pentagonal pattern.
4. The method of claim 2 wherein the width of the lateral section is
between about 35
m to about 65 m.
5. The method of claim 2 wherein the reservoir thickness is less than about
50 m and
the pentagonal pattern includes, as its lowest side, the heater wells of the
two higher
vertices of the triangular pattern and wherein the adjacent vertices of the
pentagonal

-33-


pattern extending laterally from the lowest side are located at or adjacent to
the
boundaries of the lateral section.
6. The method of claim 2 wherein the pentagonal pattern is a complete
regular or
non-regular pentagonal pattern and the apex of the pentagonal pattern is
substantially
aligned with the producer well.
7. The method of claim 2 wherein the bitumen or heavy oil drains by gravity
from an
upper portion of the lateral section into the producer well in a generally
triangular profile.
8. The method of claim 1 wherein the reservoir thickness is greater than
about 50 m
and the pentagonal pattern is elevated above the triangular pattern and
oriented with its
lowermost vertex substantially aligned with the heater well.
9. The method of claim 8 wherein an additional heater well is placed
substantially
centrally within the pentagonal pattern.
10. The method of claim 8 wherein the distance between the top of the
triangular
pattern and the lowermost vertex of the pentagonal pattern is between about 2
m to
about 20 m.
11. The method of claim 8 wherein the adjacent vertices of the pentagonal
pattern
extending laterally from the lowermost vertex are located at or adjacent to
the
boundaries of the lateral section.
12. The method of claim 8 wherein the pentagonal pattern is a complete
pentagonal
pattern with uppermost vertices contained within the boundaries of the lateral
section.
13. The method of claim 8 wherein the bitumen or heavy oil drains
vertically by gravity
from an upper portion of the lateral section into the producer well in the
pentagonal
pattern which narrows into radial inflow in the triangular pattern.

-34-


14. The method of claim 8 wherein the reservoir thickness exceeds 100 m and
additional successively elevated regular or non-regular pentagonal patterns of
heater
wells are placed above the pentagonal pattern located above the triangular
pattern.
15. The method of claim 14 wherein an additional heater well is placed
substantially
centrally within each of the pentagonal patterns.
16. The method of claim 14 wherein the bitumen or heavy oil drains
vertically by
gravity from an upper portion of the lateral section into the producer well
which narrows
into radial inflow in the pentagonal pattern located above the triangular
pattern.
17. The method of claim 14 wherein at least one higher pentagonal pattern
is arranged
such that it shares two vertices with the preceding lower pentagonal pattern.
18. A method for producing bitumen or heavy oil from a reservoir, the
method
comprising:
a) dividing at least a portion of the reservoir into a plurality of lateral
sections;
b) placing a producer well at a substantially centered location at or
adjacent to the
bottom of the reservoir within each of the lateral sections;
c) placing a triangular pattern of heater wells above each producer well;
d) placing a regular or non-regular pentagonal pattern of heater wells, or a
portion
thereof, at or above each triangular pattern of heater wells;
e) heating the reservoir with the triangular and pentagonal patterns of heater
wells
to conductively heat the reservoir and reduce the viscosity of the bitumen or
heavy oil; and
f) producing bitumen or heavy oil with the producer well of each lateral
section.
19. The method of claim 18 further comprising: g) placing a second
pentagonal pattern
of heater wells, or a portion thereof, at or above the pentagonal pattern of
heater wells
placed in step d).

-35-


20. The
method of claim 18 wherein at least one heater well of the pentagonal pattern
of heater wells of one lateral section is shared by an adjacent pentagonal
pattern of
heater wells in an adjacent lateral section.

-36-


A single figure which represents the drawing illustrating the invention.

For a clearer understanding of the status of the application/patent presented on this page, the site Disclaimer , as well as the definitions for Patent , Administrative Status , Maintenance Fee  and Payment History  should be consulted.

Admin Status

Title Date
(22) Filed 2014-10-31
(41) Open to Public Inspection 2016-04-30
Examination Requested 2017-10-02

Maintenance Fee

Description Date Amount
Last Payment 2017-09-22 $100.00
Next Payment if small entity fee 2018-10-31 $50.00
Next Payment if standard fee 2018-10-31 $100.00

Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following

  • the reinstatement fee set out in Item 7 of Schedule II of the Patent Rules;
  • the late payment fee set out in Item 22.1 of Schedule II of the Patent Rules; or
  • the additional fee for late payment set out in Items 31 and 32 of Schedule II of the Patent Rules.

Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Filing $400.00 2014-10-31
Maintenance Fee - Application - New Act 2 2016-10-31 $100.00 2016-10-07
Maintenance Fee - Application - New Act 3 2017-10-31 $100.00 2017-09-22
Request for Examination $800.00 2017-10-02

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Document
Description
Date
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Number of pages Size of Image (KB)
Abstract 2014-10-31 1 18
Description 2014-10-31 32 1,417
Claims 2014-10-31 4 115
Drawings 2014-10-31 21 1,032
Representative Drawing 2016-04-04 1 21
Cover Page 2016-05-02 2 57
Prosecution-Amendment 2017-10-02 3 95
Prosecution-Amendment 2017-10-12 1 52
Prosecution-Amendment 2017-11-24 3 239