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Accelerated start-up in sagd operations

a technology of accelerated start-up and sagd operations, which is applied in the field of oil and gas production to achieve the effect of accelerating fluid communication

Inactive Publication Date: 2011-07-21
FCCL PARTNERSHIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0021]In the case of an infill well located within a region of very limited fluid mobility that is situated between SAGD well pairs, communication is thus achieved without the need for additional procedures or processes and is sufficient to permit the infill well to participate in the recovery process by acting as a supplementary means of production.

Problems solved by technology

That aside, the process initially requires the injection of steam as a concomitant of the solvent injection “over time” while producing from the production well.

Method used

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  • Accelerated start-up in sagd operations

Examples

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Embodiment Construction

[0041]Referring to FIGS. 1 and 2, a typical SAGD recovery system 10 is shown, having an injection well 20 for injecting steam and a production well 30 for producing fluids completed in a immobile formation or reservoir 40. A portion of the injection well 20 is open to the immobile formation or reservoir 40 via an horizontal injection well completion 50. Similarly, a portion of the production well 30 is open to the immobile formation or reservoir 40 via a horizontal production well completion 60. These horizontal well completions are typically perforations, slotted liner, screens, or a combination thereof known to one skilled in the art.

[0042]In order to establish fluid communication between the injection well 20 and the production well 30 in an accelerated manner, a selected amount of solvent is injected at sub-fracturing conditions (pressure or rate or both) and ambient temperature into either the injection well 20 or the production well 30 or both the injection well 20 and the pro...

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Abstract

A method of initiating or accelerating the establishment of fluid communication between horizontal wells located in a formation of very limited fluid mobility, such as an oil sand at original temperature or an infill well completed in an immobile hydrocarbon region located between surrounding well patterns in which a gravity-dominated recovery process is or has been operated.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of priority of U.S. Provisional Patent Application No. 61 / 295,324 filed Jan. 15, 2010 and U.S. Provisional Patent Application No. 61 / 303,862 filed Feb. 12, 2010, both of which are incorporated herein by reference in their entirety.FIELD OF THE INVENTION[0002]The present invention relates to oil and gas production. More particularly, the present invention relates to the recovery of heavy oil or bitumen from, for example an oil sand or tar sand deposit. More particularly, the present invention relates to a method for starting up such operations in a gravity controlled recovery system, such as Steam Assisted Gravity Drainage (SAGD).BACKGROUND OF THE INVENTION[0003]Numerous patents, patent applications and technical papers describe means of establishing fluid communication between proximate horizontal wells that are located in porous media of limited fluid mobility, such as an oil sand at original condition...

Claims

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Application Information

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IPC IPC(8): E21B43/16
CPCE21B43/16E21B43/2406E21B43/17
Inventor MORRIS, PATTYHONG, CLAIRE Y.GUPTA, SUBODHPUGH, KIRSTEN
Owner FCCL PARTNERSHIP
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