Canadian Patents Database / Patent 2952146 Summary

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(12) Patent: (11) CA 2952146
(54) English Title: METHOD AND APPARATUS FOR ESTABLISHING FLUID COMMUNICATION BETWEEN HORIZONTAL WELLS
(54) French Title: PROCEDE ET APPAREIL POUR ETABLIR UNE COMMUNICATION FLUIDE ENTRE DES PUITS HORIZONTAUX
(51) International Patent Classification (IPC):
  • E21B 43/24 (2006.01)
  • E21B 43/12 (2006.01)
  • E21B 43/30 (2006.01)
(72) Inventors (Country):
  • NENNIGER, JOHN (Canada)
  • MELISSARI, BLAS (Uruguay)
  • KRAWCHUK, PAUL (Canada)
  • WIKSTON, JAMES (Canada)
  • GUNNEWIEK, LOWY (Canada)
(73) Owners (Country):
  • N-SOLV CORPORATION (Canada)
(71) Applicants (Country):
  • N-SOLV CORPORATION (Canada)
(74) Agent: PIASETZKI NENNIGER KVAS LLP
(45) Issued: 2017-09-26
(22) Filed Date: 2012-08-01
(41) Open to Public Inspection: 2014-02-01
Examination requested: 2016-12-19
(30) Availability of licence: N/A
(30) Language of filing: English

English Abstract

A method of starting up a well pair for EOR by establishing fluid communication between the wells is disclosed. The method includes the steps of providing a fluid based heat delivery system in each well of said well pair, and circulating a heated non-deasphalting start-up fluid in each well at a first temperature. Then, applying a pressure differential between the wells to encourage start-up fluid displacement across an inter well bore region, and controlling a viscosity of the start- up fluid through one or both of temperature and concentration control, to encourage hydraulically sweeping the inter well bore region, and transitioning from displacing the start-up fluid to a working fluid extraction process.


French Abstract

Linvention concerne un procédé de démarrage dune paire de puits pour EOR en établissant une communication fluidique entre les puits. Le procédé comprend les étapes consistant à fournir un système de distribution de chaleur à base de fluide dans chaque puits de ladite paire de puits et à faire circuler un fluide de démarrage non désasphalte chauffé dans chaque puits à une première température. Ensuite, en appliquant une différence de pression entre les puits pour favoriser le déplacement du fluide de démarrage dans une zone inter-puits et en contrôlant une viscosité du fluide de démarrage par lintermédiaire dune ou de la température et du contrôle de la concentration, afin dencourager le balayage hydraulique de linter-puits de la région dalésage et la transition du déplacement du fluide de démarrage à un processus dextraction de fluide de travail.


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

-23-
THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An apparatus for applying a start-up method to an inter well bore region

between two vertically displaced horizontal wells, said apparatus comprising:
a source of non deasphalting start-up fluid above grade;
a heater for heating said start-up fluid;
a well head connection from said source to each of said two vertically
displaced
horizontal wells;
a fluid delivery and removal system connected to said well head connection to
permit said start-up fluid to be circulated along each of said two vertically
displaced
horizontal wells;
one or more circulating pumps for circulating said start-up fluid from said
source through said heater down into said formation along each of said
vertically
displaced horizontal wells and then back up to the surface;
a conditioner located above grade to remove solids and water if necessary from

said returned start-up fluid, and
sensors to measure one or more of a temperature, a viscosity, and a
composition of said start-up fluid which is returned to the surface.
2. The apparatus as claimed in claim 1 wherein said source of start-up
fluid is a
source of diesel fluid.
3. The apparatus according to any one of claims 1 and 2 further including a
down
hole heater to warm said inter wellbore region between said two vertically
displaced
horizontal wells.
4. The apparatus according to any one of claims 1 and 2 further including a
source
of make-up start-up fluid.

-24-
5. The apparatus according to any one of claims 1, 2 and 3 further
including at
least one vertical observation well having temperature sensors for measuring a

temperature within said inter well bore region.
6. The apparatus as claimed in claim 1 wherein said fluid delivery and
removal
system includes a fluid delivery tubular extending into a toe of at least one
well.
7. The apparatus as claimed in claim 1 wherein said fluid delivery and
removal
system includes a fluid delivery tubular extending to a toe of both wells.
8. The apparatus as claimed in claim 1 wherein said fluid delivery and
removal
system includes a fluid delivery tubular extending to a heel of at least one
well.
9. The apparatus as claimed in claim 1 wherein said fluid delivery and
removal
system includes a fluid delivery tubular extending to a heel of both wells.
10. The apparatus according to any one of claims 6 and 7 further including
a fluid
removal tubular extending from a heel of each of said wells having a fluid
delivery
tubular in said toe.
11. The apparatus according to any one of claims 8 and 9 wherein said fluid

delivery and removal system further includes a fluid removal tubular extending

towards a toe of each well having a fluid delivery tubular located towards the
heel
thereof.


A single figure which represents the drawing illustrating the invention.

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Admin Status

Title Date
(22) Filed 2012-08-01
(41) Open to Public Inspection 2014-02-01
Examination Requested 2016-12-19
(45) Issued 2017-09-26

Maintenance Fee

Description Date Amount
Last Payment 2017-07-12 $200.00
Next Payment if small entity fee 2018-08-01 $100.00
Next Payment if standard fee 2018-08-01 $200.00

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
Request for Examination $800.00 2016-12-19
Filing $400.00 2016-12-19
Maintenance Fee - Application - New Act 2 2014-08-01 $100.00 2016-12-19
Maintenance Fee - Application - New Act 3 2015-08-03 $100.00 2016-12-19
Maintenance Fee - Application - New Act 4 2016-08-01 $100.00 2016-12-19
Registration of Documents $100.00 2017-02-15
Maintenance Fee - Application - New Act 5 2017-08-01 $200.00 2017-07-12
Final $300.00 2017-08-10

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Document
Description
Date
(yyyy-mm-dd)
Number of pages Size of Image (KB)
Abstract 2016-12-19 1 19
Description 2016-12-19 22 1,066
Claims 2016-12-19 8 269
Drawings 2016-12-19 9 256
Claims 2016-12-20 2 65
Description 2016-12-20 22 1,081
Representative Drawing 2016-12-29 1 17
Cover Page 2017-01-12 2 52
Claims 2017-02-09 2 66
Correspondence 2017-01-03 1 147
Prosecution-Amendment 2016-12-19 58 3,045
Prosecution-Amendment 2016-12-19 1 28
Prosecution-Amendment 2017-01-18 3 191
Prosecution-Amendment 2017-02-09 7 252
Fees 2017-07-12 1 33
Correspondence 2017-08-10 1 45
Cover Page 2017-08-25 1 47