Method for mining deep and ultra-deep thick oil pools by using double horizontal well fire flooding drainage

A mining method and ultra-deep technology, which can be used in the development of fluids, earth-moving drilling, wellbore/well components, etc. The effect of oil belt area, low safety risk, high recovery factor

Active Publication Date: 2013-01-30
PETROCHINA CO LTD
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Problems solved by technology

[0008] The object of the present invention is to provide a kind of deep and ultra-deep heavy oil reservoir dual-horizontal well fire flooding oil recovery method, which can effectively overcome the problems of low steam he

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  • Method for mining deep and ultra-deep thick oil pools by using double horizontal well fire flooding drainage
  • Method for mining deep and ultra-deep thick oil pools by using double horizontal well fire flooding drainage
  • Method for mining deep and ultra-deep thick oil pools by using double horizontal well fire flooding drainage

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[0053] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0054] Such as figure 1 , figure 2 As shown, the present invention proposes a kind of deep and ultra-deep heavy oil reservoir dual-horizontal well fire flooding oil drainage production method, the main oil layer of this heavy oil reservoir is buried deep, the average buried depth is 1850m, the original reservoir pressure 16MPa, the original The temperature of the reservoir is 69°C; the viscosity of crude oil is high, and the viscosity of crude oil at the reservoir temperature is 480,000 centipoise, and the effective average thickness of the reservoir is 19m.

[0055] The deep and ultra-deep heavy oil reservoir double-horizontal well fire flooding oil drainage production method of the present invention comprises the following st...

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Abstract

The invention discloses a method for mining deep and ultra-deep thick oil pools by using double horizontal well fire flooding drainage. A horizontal flooding well network is arranged in a thick oil pool mining region, an injection well and a production well are arranged in an oil layer at the same vertical plane to form a horizontal flooding well pair, the horizontal section of the production well is located on the lower portion of the horizontal section of the injection well and is parallel with the horizontal section of the injection well, the injection well and the production well conduct steam injection cycling preheating at the same time, when the temperature of the oil layer between the horizontal sections of the injection well and the production well is raised to the preset temperature, the injection well and the production well stop the cycling preheating at the same time, a slug of oxygen enriched air is injected by the injection well continuously, the oil layer of the horizontal sections is lighted, the air is injected by the injection well after lighting, and the production well conducts continuous mining production. Compared with normal steam flooding mining methods such as a steam assistant gravity oil drainage technology, the method has the advantages that the recovery ratio is increased by more than 10-20%, the ultimate recovery ratio can reach more than 60% and the economic benefits are better than other methods.

Description

technical field [0001] The invention relates to a mining method for heavy oil reservoirs in the field of petroleum exploitation, in particular to a mining method for deep and ultra-deep heavy oil reservoirs using a dual-horizontal well fire flooding oil drainage technology. Background technique [0002] Deep and ultra-deep heavy oil reservoirs refer to heavy oil reservoirs with a burial depth greater than 1,500 meters, which have huge reserves in Tuhalukqin and other places in my country. The development technologies of heavy oil reservoirs usually include steam flooding technology, steam assisted gravity drainage technology, steam huff and puff technology and other steam injection development technologies, but for deep and ultra-deep heavy oil reservoirs, there are many problems in the above steam injection development technologies. [0003] Steam-assisted gravity drainage technology was invented by Canada's Bulter in 1978, and has been successfully applied in heavy oil res...

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Application Information

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IPC IPC(8): E21B43/243E21B43/24E21B43/30
Inventor 吴永彬赵欣高亮何万军李秀峦
Owner PETROCHINA CO LTD
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