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Oxygen reduction air layered injection pipe column, system and method

An air system and air pipe technology, which is applied to earth-moving drilling, production of fluids, wellbore/well components, etc., can solve the problems of affecting the effect of gas-driven oil displacement, poor oil-increasing effect of well groups, and high production gas-oil ratio. To achieve the effect of reducing oil-water interfacial tension, improving effect and low cost

Active Publication Date: 2018-08-14
PETROCHINA CO LTD
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Problems solved by technology

The gas channeling well group exhibits a high production gas-oil ratio, and the well group has a poor oil stimulation effect, and even leads to the shutdown of the oil well, which seriously affects the overall oil displacement effect of gas flooding

Method used

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  • Oxygen reduction air layered injection pipe column, system and method
  • Oxygen reduction air layered injection pipe column, system and method

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Embodiment Construction

[0039] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art Modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of the present application.

[0040] 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.

[0041] It should be noted that when an element is referred to as being “d...

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Abstract

The invention discloses an oxygen reduction air layered injection pipe column, system and method. The oxygen reduction air layered injection system comprises the oxygen layered reduction air injectionpipe column arranged in an oil reservoir at least comprising an upper oil layer and a lower oil layer and monitoring equipment. The oxygen layered reduction air injection pipe column comprises an upper oil pipe arranged in an upper sleeve, an upper packer, an air injection nipple, a lower oil pipe, a guiding-in pipe, an inserting sealing piece and a lower packer, wherein the upper packer and theair injection nipple are sequentially connected to the lower portion of the upper oil pipe from top to bottom, the lower oil pipe is arranged on the lower portion of the air injection nipple, and a ball seat is arranged at the lower end of the lower oil pipe. The guiding-in pipe is arranged in the upper oil pipe, the upper packer, the air injection nipple and the part of the lower oil pipe in a penetrating mode, the inserting sealing piece is arranged between the guiding-in pipe and the upper portion of the lower oil pipe, and the lower packer is arranged between the lower sleeve and the loweroil pipe. The lower packer is located between the upper oil layer and the lower oil layer, and the monitoring equipment comprises a concentration detecting piece for monitoring the oxygen concentration of a production well. According to the oxygen reduction air layered injection pipe column, system and method, the good air layered injection exploitation effect can be achieved.

Description

technical field [0001] The invention relates to the technical field of oxygen-reducing air flooding, in particular to a column, system and method for layer-by-layer injection of oxygen-reducing air. Background technique [0002] Oxygen-reduced air recovery technology mainly relies on the nitrogen separated from the air to supplement the formation energy, the viscosity reduction effect of the heat generated by the oxidation reaction of oxygen and crude oil, and the viscosity reduction and displacement effect of the reaction products to supplement the formation energy and improve the reservoir production effect. [0003] Oxygen-reducing air flooding tests have been carried out in some areas of my country, and a total of 24 well groups have been implemented. Through continuous exploration and testing, good oil increase effects have been achieved, and stable production of buried hill reservoirs has been realized. However, many problems have been exposed during the implementation...

Claims

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Application Information

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IPC IPC(8): E21B43/16
CPCE21B43/168
Inventor 杨轶博冷彪冯志强韩锋邵堃刘大伟李松陈洪波
Owner PETROCHINA CO LTD
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