Canadian Patents Database / Patent 2869600 Summary

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(12) Patent: (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: 2018-05-29
(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.


French Abstract

Un procédé pour produire du bitume ou du pétrole lourd à partir dun réservoir. Le procédé consiste à définir au moins une section latérale du réservoir pour la mise en place densembles de puits chauffants au-dessus dun puits de production, et à placer ce dernier à un emplacement essentiellement centré au fond du réservoir, ou adjacent à celui-ci, dans chacune des sections latérales. Le procédé consiste également à placer un ensemble triangulaire de puits chauffants au-dessus du puits de production, à placer un ensemble pentagonal régulier ou irrégulier de puits chauffants, ou une partie de celui-ci, au niveau ou au-dessus de lensemble triangulaire de puits chauffants, à chauffer le réservoir avec les ensembles triangulaire et pentagonal de puits chauffants pour chauffer par conduction le réservoir et réduire la viscosité du bitume ou du pétrole lourd, et à produire du bitume ou du pétrole lourd avec le puits de production.


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, the
triangular
pattern arranged with a lowermost vertex located above and substantially
aligned with
the producer well;
d) placing a regular or non-regular pentagonal pattern of heater wells above
the
triangular pattern of heater wells, the pentagonal pattern including as its
lowest side, the
heater wells of the two higher vertices of the triangular pattern;
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 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 1 or 2 wherein an additional heater well is placed
substantially centrally within the pentagonal pattern.
4. The method of any one of claims 1 to 3 wherein the width of the lateral
section is
between about 35 m to about 65 m.
5. The method of any one of claims 1 to 4 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.
- 33 -

6. The method of any one of claims 1 to 5 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.
7. 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, the
triangular pattern arranged with a lowermost vertex located above and
substantially
aligned with the producer well;
d) placing a plurality of successively elevated regular or non-regular
pentagonal
patterns of heater wells above the triangular pattern of heater wells, wherein
at least one
upper pentagonal pattern is spaced apart from an adjacent lower pentagonal
pattern and
at least one upper pentagonal pattern is arranged to share two vertices with
upper
vertices of a lower pentagonal pattern;
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.
8. The method of claim 7, wherein the 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.
9. The method of claim 7 or 8, wherein an additional heater well is placed
substantially centrally within one or more of the pentagonal patterns.
10. The method of any one of claims 7 to 9, wherein the width of the
lateral section is
between about 35 m to about 65 m.
- 34 -

11. The method of any one pf claims 7 to 10, 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.
12. A method for modeling the construction of an assembly of heater wells
for
thermally assisted gravity drainage of 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, the
triangular pattern arranged with a lowermost vertex located above and
substantially
aligned with the producer well; and
d) placing successively elevated regular or non-regular pentagonal patterns of

heater wells above the triangular pattern with each pentagonal pattern
oriented with a
lower vertex substantially aligned with the producer well until an uppermost
pentagonal
pattern is placed near the upper boundary of the reservoir, wherein, if the
upper vertices
of the uppermost pentagonal pattern are found to extend above the upper
boundary, one
or more of the pentagonal patterns are rearranged to share their lower
vertices with the
upper vertices of a lower adjacent pentagonal pattern, thereby placing an
uppermost
vertex of the uppermost pentagonal pattern below the upper boundary.
13. The method of claim 12, wherein the 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.
14. The method of claim 12 or 13, wherein an additional heater well is
placed
substantially centrally within one or more of the pentagonal patterns.
- 35 -

15. The method of any one of claims 12 to 13, wherein the width of the
lateral section
is between about 35 m to about 65 m.
16. The method of any one pf claims 12 to 15, 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.
- 36 -


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Admin Status

Title Date
(22) Filed 2014-10-31
(41) Open to Public Inspection 2016-04-30
Examination Requested 2017-10-02
(45) Issued 2018-05-29

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
Final $300.00 2018-04-10

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Document
Description
Date
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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
Prosecution-Amendment 2018-01-10 16 580
Claims 2018-01-10 4 115
Description 2018-01-10 34 1,402
Correspondence 2018-04-10 1 32
Representative Drawing 2018-05-02 1 18
Cover Page 2018-05-02 1 48