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Method and device for improving fireflooding auxiliary gravity oil-drainage exploiting effect

An auxiliary gravity and oil drainage technology, which is applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of horizontal well section burning, test and production failure, fire line channeling, etc.

Active Publication Date: 2017-09-19
PETROCHINA CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although technicians have made some achievements in the research of fire-assisted gravity drainage, during the production process, high-temperature gas can enter the horizontal well along with the flowable oil, causing fire line channeling, which may eventually lead to the burning of the horizontal well section , leading to test and production failure

Method used

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  • Method and device for improving fireflooding auxiliary gravity oil-drainage exploiting effect

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Embodiment Construction

[0022] To clarify, when a component is said to be "set on" another component, it can be directly on the other component or there can be an intervening component as well. When a component is said to be "connected" to another component, it can be directly connected to the other component or there may be a centered component at the same time.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is only for the purpose of describing specific embodiments, and is not intended to limit the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0024] figure 1 It is a process flow chart of a method for improving the recovery effect of fire flooding assisted gravity drainage in an embodiment...

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Abstract

The invention provides a method and device for improving the fireflooding auxiliary gravity oil-drainage exploiting effect. The device for improving the fireflooding auxiliary gravity oil-drainage exploiting effect comprises a horizontal well, a production oil pipe and a tracing pipe, wherein the horizontal well comprises a vertical section and a horizontal section which is connected with the vertical section, the horizontal section is located in an oil layer and communicates with the oil layer, and the production oil pipe and the tracing pipe are arranged in the horizontal well. The lower ends of the production oil pipe and the tracing pipe are both located in the horizontal section, and the production oil pipe and the tracing pipe communicate with the horizontal section. According to the device for improving the fireflooding auxiliary gravity oil-drainage exploiting effect, fire wires can be prevented from breaking through and entering into the horizontal section, and the fireflooding auxiliary gravity oil-drainage exploiting effect can be improved.

Description

technical field [0001] The present application relates to the technical field of oil and gas extraction, in particular to a method and device for improving the effect of fire flooding assisted gravity drainage oil recovery. Background technique [0002] The descriptions in this section merely provide background information related to the disclosure in this application and may not constitute prior art. [0003] Fire flooding assisted gravity drainage is a new technology for fire flooding to develop heavy oil by introducing horizontal production wells and using gravity drainage on the basis of conventional vertical well fire flooding technology. Different from conventional fire flooding, the combustion front of fire flooding assisted gravity drainage spreads from the toe to the heel of the horizontal well, and quickly forms a flowable oil belt in front of it. The high temperature in the oil belt provides a source of thermal displacement and retains heavy oil Thermal cracking ...

Claims

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Application Information

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IPC IPC(8): E21B43/24E21B43/243
CPCE21B43/2406E21B43/243
Inventor 宫宇宁李晓漫韩冰王飞宇李秀明欧洲侯喜建高飞王中元刘茜焦春宇王梓吉许鑫
Owner PETROCHINA CO LTD
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