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):||
|(72) Inventors (Country):||
|(73) Owners (Country):||
|(71) Applicants (Country):||
|(74) Agent:||PIASETZKI NENNIGER KVAS LLP|
|(22) Filed Date:||2012-08-01|
|(41) Open to Public Inspection:||2014-02-01|
|(30) Availability of licence:||N/A|
|(30) Language of filing:||English|
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.
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.
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
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
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
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
hole heater to warm said inter wellbore region between said two vertically
4. The apparatus according to any one of claims 1 and 2 further including a
of make-up start-up fluid.
5. The apparatus according to any one of claims 1, 2 and 3 further
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
system includes a fluid delivery tubular extending into a toe of at least one
7. The apparatus as claimed in claim 1 wherein said fluid delivery and
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
system includes a fluid delivery tubular extending to a heel of at least one
9. The apparatus as claimed in claim 1 wherein said fluid delivery and
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
removal tubular extending from a heel of each of said wells having a fluid
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
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|(41) Open to Public Inspection||2014-02-01|
|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;
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|Fee Type||Anniversary Year||Due Date||Amount Paid||Paid Date|
|Request for Examination||$800.00||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|