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Fire flooding ignition method and its pipe string

A fire flooding and pipe string technology, applied in the field of petroleum exploration, can solve the problems of easy casing damage control and other problems, and achieve the effects of increasing temperature and oxidation heat release rate, increasing the degree of longitudinal production, and improving the displacement effect.

Active Publication Date: 2017-11-10
PETROCHINA CO LTD
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Problems solved by technology

[0005] The embodiment of the present invention provides a fire drive ignition method and its pipe string to solve the problems of easy casing damage and difficult operation encountered in the existing fire drive ignition method

Method used

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  • Fire flooding ignition method and its pipe string
  • Fire flooding ignition method and its pipe string
  • Fire flooding ignition method and its pipe string

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Embodiment Construction

[0044] The details of the present invention can be understood more clearly with reference to the accompanying drawings and the description of specific embodiments of the present invention. However, the specific embodiments of the present invention described here are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible modification based on the present invention, and these should be regarded as belonging to the scope of the present invention. In the embodiment of the present invention, "up" refers to the direction of the wellhead, and "down" refers to the direction of the bottom of the well away from the wellhead.

[0045] Such as figure 1 As shown, the present invention provides a fire flooding ignition method, comprising the following steps: lowering into the injection well a pipe string that passes through t...

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Abstract

The invention provides a fire driving ignition method and its pipe string. In the fire driving ignition method, the pipe string is first lowered into the injection well, and then, air is injected into the outer pipe and the inner pipe at the same time, so that the air passes through the first sieve respectively. The pipe part and the injection head are injected into the oil layer, so as to judge whether the injection well is connected to the production well for oil production; Air is injected into the inner pipe to introduce high-temperature steam into the oil layer between the first packer and the second packer, and introduce air into the oil layer below the second packer to burn the oil layer. By using the fire flooding ignition method and the pipe string of the present invention, the temperature of the oil layer and the heat release rate of oxidation can be rapidly increased by injecting air and steam in layers, so that the oil layer can quickly reach the ignition point, increase the vertical producing degree of the formation, and increase the viscosity. Oil displacement effect.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a fire flooding ignition method and a pipe string thereof. Background technique [0002] Fire flooding, also known as burning oil layer, refers to an oil recovery method that uses electricity, chemical methods, etc. to make the temperature of the oil layer reach the ignition point of crude oil, and inject air or oxygen into the oil layer to keep the crude oil in the oil layer burning. In the process of oil recovery by fire flooding, successful ignition is one of the key technologies for the successful application of fire flooding technology. [0003] At present, there are three main ignition methods for fire flooding. The first is steam injection spontaneous ignition, which first injects a certain amount of steam into the oil well to preheat the oil layer, and then injects air to use the oxidation of air and hot oil to ignite the hot oil layer. The second is chemic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/243E21B43/24
Inventor 孙振宇于晓聪张宏波曲绍刚王智博杨宝春袁爱武卢丽丝吕孝明李辉刘佩衡
Owner PETROCHINA CO LTD
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