Base de données sur les brevets canadiens / Sommaire du brevet 2743748 

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Disponibilité de l'Abrégé et des Revendications

L'apparition de différences dans le texte et l'image des Revendications et de l'Abrégé dépend du moment auquel le document est publié. Les textes des Revendications et de l'Abrégé sont affichés :

  • lorsque la demande peut être examinée par le public;
  • lorsque le brevet est émis (délivrance).
(12) Brevet: (11) CA 2743748
(54) Titre français: DRAINAGE PAR GRAVITE AU MOYEN DE CHALEUR (TAGD)
(54) Titre anglais: THERMAL ASSISTED GRAVITY DRAINAGE (TAGD)
(51) Classification internationale des brevets (CIB):
  • E21B 43/24 (2006.01)
  • E21B 36/04 (2006.01)
(72) Inventeurs (Pays):
  • GOULD, BRYAN (Canada)
  • ATKINSON, IAN (Canada)
  • ROBERTS, BRUCE (Canada)
  • BEATTIE, DOUG (Canada)
  • CRANE, STEVEN D. (Etats-Unis d'Amérique)
  • HALE, ARTHUR (Etats-Unis d'Amérique)
  • HAMIDA, TAREK (Canada)
  • PATEL, NEERAJ (Canada)
(73) Titulaires (Pays):
  • ATHABASCA OIL CORPORATION (Canada)
(71) Demandeurs (Pays):
  • ATHABASCA OIL SANDS CORP. (Canada)
(74) Agent: HICKS & ASSOCIATES
(45) Délivré: 2014-09-23
(22) Date de dépôt: 2011-06-17
(41) Mise à la disponibilité du public: 2012-12-17
Requête d’examen: 2013-08-09
(30) Licence disponible: S.O.
(30) Langue des documents déposés: Anglais

Abrégé français

Un système et une méthode sont proposés pour produire du bitume ou de lhuile lourde à partir dun réservoir clastique ou de carbonate. La mobilité du bitume ou de lhuile lourde est accrue par chauffage conducteur pour réduire la viscosité. Le bitume ou lhuile lourde est chauffé à des températures inférieures à la température de craquage thermique du bitume ou de lhuile lourde. Comme le bitume ou lhuile lourde est produit, les gaz émis ou leau connée évaporée ou les deux forment une chambre à gaz pour remplir au moins partiellement les vides laissés par le bitume ou lhuile lourde produit.


Abrégé anglais

A system and method for producing bitumen or heavy oil from a clastic or carbonate reservoir. The mobility of the bitumen or heavy oil is increased by conductive heating to reduce the viscosity. The bitumen or heavy oil is heated to temperatures below the thermal cracking temperature of the bitumen or heavy oil. As the bitumen or heavy oil is produced, evolved gases or evaporated connate water or both form a gas chamber to at least partially the voids left by the produced bitumen or heavy oil.


Note : Les revendications sont présentées dans la langue officielle dans laquelle elles ont été soumises.

CLAIMS:
1. A method of producing bitumen or heavy oil from a reservoir comprising:
a) providing a horizontal producer well adjacent to a lower boundary of a
cross-
sectional area of the reservoir and substantially centered between two
vertical no-flow
boundaries within a cross-sectional area of the reservoir;
b) providing a plurality of vertically distributed rows of horizontal heater
wells in the
reservoir above the producer well, the plurality of rows including a first row
with a single
aligned heater well substantially vertically aligned and parallel with the
producer well and
a second row above the first row including at least two offset heater wells
laterally offset
and substantially equidistant from the producer well;
c) activating the heater wells to conductively heat the reservoir and reduce
the
viscosity of the bitumen or heavy oil;
d) allowing the bitumen or heavy oil to drain by gravity into the producer
well; and
e) producing the bitumen or heavy oil with the producer well.
2. The method of claim 1 further comprising:
providing a reservoir producer heater in the producer well; and
operating the reservoir producer heater to conductively heat the reservoir and
reduce the
viscosity of the bitumen or heavy oil.
3. The method of claim 1 further comprising:
providing a reservoir producer heater in a vertical section of the producer
well; and
operating the reservoir producer heater to facilitate flow of the bitumen or
heavy oil in the
producer well upstream to the well head.
4. The method of any one of claims 1-3, wherein the reservoir is heated to an
average
temperature of less than the thermal cracking temperature of the bitumen or
heavy oil in the
reservoir at reservoir conditions.
5. The method of any one of claims 1-3, wherein the reservoir is heated to a
temperature less
than the saturated steam temperature at reservoir conditions.
17

6. The method of any one of claims 1-5 wherein the reservoir is heated to an
average
temperature of between about 120 °C and about 160 °C.
7. The method of any one of claims 1-6 wherein the reservoir is heated to an
average
temperature of between about 135 °C and about 145 °C.
8. The method of any one of claims 1-7 wherein the reservoir is a clastic
reservoir.
9. The method of any one of claims 1-7 wherein the reservoir is a carbonate
reservoir.
10. The method of claim 9 wherein the reservoir is a dolomite reservoir.
11. The method of claim 9 wherein the reservoir is a limestone reservoir.
12. The method of claim 9 wherein the reservoir is a karsted reservoir.
13. The method of claim 9 wherein the reservoir is a vuggy reservoir.
14. The method of claim 9 wherein the reservoir is a moldic reservoir.
15. The method of claim 9 wherein the reservoir is a fractured reservoir.
16. The method of any one of claims 1-5 and 8-15 further comprising:
selecting a target average temperature; and
reducing heating of the heater wells once the average temperature of the
reservoir is
substantially equal to the target average temperature to maintain the average
temperature of the reservoir at the target average temperature without
increasing the
average temperature of the reservoir.
17. The method of claim 16 wherein the target average temperature is between
about 120 °C
and about 160 °C.
18. The method of claim 17 wherein the target average temperature is between
about 135 °C
and about 145 °C.
18

19. The method of any one of claims 1-18 further comprising controlling
pressure during
production to prevent an increase in pressure due to thermal expansion of in
situ fluids.
20. The method of claim 19 wherein the pressure is controlled by drawing down
pressure from
the reservoir.
21. The method of any one of claims 1-20 wherein the plurality of vertically
distributed rows of
horizontal heater wells further includes at least one additional row with a
single aligned heater
well substantially aligned with and parallel to the producer well, to keep the
area near the
producer sufficiently warm to allow drainage of the bitumen or heavy oil into
the producer well
and at least one additional row including at least two offset heater wells
laterally offset and
substantially equidistant from the producer well.
22. The method of claim 21 wherein the rows with a single aligned heater well
alternate with the
rows of offset heater wells.
23. The method of claim 22 wherein the plurality of vertically distributed
rows of horizontal
heater wells includes at least two rows with a single aligned heater well and
at least two rows
with offset heater wells.
24. The method of claim 23 wherein the rows with an aligned heater well
alternate with the rows
of offset heater wells.
25. The method of claim 23 wherein the distance between the two offset heater
wells of the
same row varies among different rows of offset heater wells.
26. The method of any one of claims 1-25 wherein at least one row of offset
heater wells
includes one offset heater well located substantially at or adjacent to each
no-flow vertical
boundary of the cross-sectional area of the reservoir.
27. The method of any one of claims 1-26 wherein at least one row of offset
heater wells further
includes a heater well substantially laterally aligned with the producer well,
to provide sufficient
heating to promote drainage of the bitumen or heavy oil above the producer
well.
19

28. The method of any one of claims 1-27 wherein the plurality of rows of
heater wells includes
three rows of heater wells with one aligned heater well row and two offset
heater well rows.
29. The method of claim 28 wherein the three rows of heater wells follows a
pattern wherein:
the first row above the producer well includes a single aligned heater well,
the second row above the producer well includes two offset heater wells, and
the third row above the producer well includes two offset heater wells and a
single
aligned heater well.
30. The method of claim 28 or 29 wherein the vertical distance between
adjacent rows is
between about 8 m to about 15 m.
31. The method of any one of claims 28-30 wherein the distance between offset
heater wells in
the same row is between about 12 m to about 40 m.
32. The method of any one of claims 28-31 wherein the reservoir has a
thickness of about 40 m.
33. The method of any one of claims 1-27 wherein the plurality of rows of
heater wells includes
five rows of heater wells with three aligned heater well rows and two offset
heater well rows.
34. The method of claim 33 wherein the five rows of heater wells follows a
pattern wherein:
the first row above the producer well includes a single aligned heater well,
the second row above the producer well includes two offset heater wells,
the third row above the producer well includes a single aligned heater well,
the fourth row above the producer well includes two offset heater wells, and
the fifth row above the producer well includes a single aligned heater well.
35. The method of claim 33 or 34 wherein the vertical distance between
adjacent rows is
between about 2 m to about 15 m.
36. The method of any one of claims 33-35 wherein the distance between offset
heater wells in
the same row is between about 12 m to about 50 m.

37. The method of any one of claims 33-36 wherein the reservoir has a
thickness of about 60 m.
38. The method of any one of claims 1-27 wherein the plurality of rows of
heater wells includes
six rows of heater wells with three aligned heater well rows and three offset
heater well rows.
39. The method of claim 38 wherein the six rows of heater wells follows a
pattern wherein:
the first row above the producer well includes a single aligned heater well,
the second row above the producer well includes two offset heater wells,
the third row above the producer well includes a single aligned heater well,
the fourth row above the producer well includes two offset heater wells,
the fifth row above the producer well includes a single aligned heater well,
and
the sixth row above the producer well includes two offset heater wells.
40. The method of claim 38 or 39 wherein the vertical distance between
adjacent rows is
between about 4 m to about 14 m.
41. The method of any one of claims 38-40 wherein the distance between offset
heater wells in
the same row is between about 12 m to about 50 m.
42. The method of any one of claims 38-41 wherein the reservoir has a
thickness of about 80 m.
43. The method of any one of claims 1-42 wherein the heater wells are heated
by an electric
resistance cable heater, a fluid exchange heater, hot water, steam, oil,
molten salts, or molten
metals.
44. The method of any one of claims 1-43 wherein step c) generates gas through
solution gas
evolution and connate water vaporization to replace voidage created by step
e).
45. The method of any one of claims 1-44 wherein step d) further comprises
injecting gas into a
zone overlying the reservoir.
21


Une figure unique qui représente un dessin illustrant l’invention.

Pour une meilleure compréhension de l’état de la demande ou brevet qui figure sur cette page, la rubrique Mise en garde , et les descriptions de Brevet , États administratifs , Taxes périodiques et Historique des paiements devraient être consultées.

États admin

Titre Date
(22) Dépôt 2011-06-17
(41) Mise à la disponibilité du public 2012-12-17
Requête d'examen 2013-08-09
(45) Délivré 2014-09-23

Taxes périodiques

Description Date Montant
Dernier paiement 2017-06-15 200,00 $
Prochain paiement si taxe applicable aux petites entités 2018-06-18 100,00 $
Prochain paiement si taxe générale 2018-06-18 200,00 $

Avis : Si le paiement en totalité n’a pas été reçu au plus tard à la date indiquée, une taxe supplémentaire peut être imposée, soit une des taxes suivantes :

  • taxe de rétablissement prévue à l’article 7 de l’annexe II des Règles sur les brevets ;
  • taxe pour paiement en souffrance prévue à l’article 22.1 de l’annexe II des Règles sur les brevets ; ou
  • surtaxe pour paiement en souffrance prévue aux articles 31 et 32 de l’annexe II des Règles sur les brevets.

Historique des paiements

Type de taxes Anniversaire Échéance Montant payé Date payée
Dépôt 400,00 $ 2011-06-17
Enregistrement de documents 100,00 $ 2011-09-15
Taxe périodique - Demande - nouvelle loi 2 2013-06-17 100,00 $ 2013-03-14
Requête d'examen 800,00 $ 2013-08-09
Enregistrement de documents 100,00 $ 2013-10-28
Taxe périodique - Demande - nouvelle loi 3 2014-06-17 100,00 $ 2014-03-27
Final 300,00 $ 2014-07-10
Taxe périodique - brevet - nouvelle loi 4 2015-06-17 100,00 $ 2015-05-29
Taxe périodique - brevet - nouvelle loi 5 2016-06-17 200,00 $ 2016-06-06
Taxe périodique - brevet - nouvelle loi 6 2017-06-19 200,00 $ 2017-06-15

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Filtre Télécharger sélection en format PDF (archive Zip)
Description du
Document
Date
(yyyy-mm-dd)
Nombre de pages Taille de l’image (Ko)
Abrégé 2011-06-17 1 12
Description 2011-06-17 16 793
Revendications 2011-06-17 4 116
Dessins représentatifs 2012-09-20 1 31
Page couverture 2012-11-29 1 58
Revendications 2014-05-28 5 192
Dessins 2011-06-17 12 139
Page couverture 2014-08-28 1 61
Correspondance 2011-09-15 1 46
Correspondance 2013-11-13 1 13
Correspondance 2013-11-13 1 16
Poursuite-Amendment 2013-08-09 1 38
Correspondance 2013-10-28 2 75
Poursuite-Amendment 2014-05-28 7 250
Poursuite-Amendment 2014-06-06 1 20
Correspondance 2014-07-10 2 61
Correspondance 2015-01-23 7 277
Taxes 2016-06-06 1 33
Taxes 2017-06-15 1 33