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Heavy oil extraction system and method

An oil production system, heavy oil technology, used in the production of fluids, earth-moving drilling, wellbore/well components, etc.

Active Publication Date: 2018-04-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is currently no effective fire flooding oil recovery technology that can better control air flow, stabilize oil drainage, and stabilize combustion.

Method used

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  • Heavy oil extraction system and method
  • Heavy oil extraction system and method

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Embodiment Construction

[0032] Embodiments of the present application provide a heavy oil recovery system and method.

[0033] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0034] 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 ...

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Abstract

The invention discloses a heavy oil extraction system and method. The system includes a pipe column device, a water-injection regulating valve and a temperature controller. The pipe column device includes a sieve tube arranged in a horizontal well section, a water injection pipe, a short pipe and a temperature test tube, wherein the water injection pipe, the short pipe and the temperature test tube are arranged in the sieve tube; a sieve hole is formed in the sieve tube, and the temperature test tube is internally provided with several thermoelectric pairs used for monitoring the temperature of the horizontal well section; the water-injection regulating valve is arranged on the ground and used for adjusting the water injection amount of the water injection pipe; a temperature controller isarranged on the ground and connected with the thermoelectric pairs, and when the temperature of the horizontal well section is not in a preset temperature range, the temperature controller controls the regulating degree of the water-injection regulating valve to adjust the water injection amount of the water injection pipe, so that the temperature is in the preset temperature range. According tothe technical scheme, in the fireflooding combustion process, combustion is stably controlled, and the problems that in the horizontal-well fireflooding process, gas channeling causes burning of firewires and oxygen runs out from the horizontal well are prevented.

Description

technical field [0001] The present application relates to the technical field of heavy oil oil recovery, in particular to a heavy oil recovery system and method. Background technique [0002] The main difficulty in the exploitation of heavy oil fields lies in the high viscosity, high density and low fluidity of crude oil. For heavy oil fields, fire flooding technology is usually used for temperature rise and viscosity reduction development. Fire flooding technology is an oil recovery method that uses electric ignition, chemical ignition and other methods to make the temperature of the oil layer reach the ignition point of crude oil, and inject air into the oil layer to keep the crude oil in the oil layer burning. The method has the advantages of high thermal efficiency, high ultimate recovery, energy saving and emission reduction. [0003] When using fire flooding technology for heavy oil development, it is necessary to continuously inject air into the formation to ignite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/243E21B47/07
CPCE21B43/243E21B47/07
Inventor 席长丰齐宗耀蒋有伟关文龙韩文磊张霞林唐君实王红庄李秀峦
Owner PETROCHINA CO LTD
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