Steam injection method for heavy oil thermal recovery well

A heavy oil thermal recovery and steam injection technology, which is applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problems of poor production effect and uneven production degree.

Active Publication Date: 2019-12-31
PETROCHINA CO LTD
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Problems solved by technology

[0004] The main purpose of the present invention is to provide a steam injection method for heavy oil thermal recovery wells, so as to solve the problem of poor production effect caused by unbalanced production degree of heavy oil thermal recovery horizontal wells in the prior art

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  • Steam injection method for heavy oil thermal recovery well
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Embodiment Construction

[0022] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0023] Such as figure 1 As shown, the embodiment of the present invention provides a kind of steam injection method of heavy oil thermal recovery well, and heavy oil thermal recovery well comprises vertical well section and the horizontal well section connected with vertical well section, and steam injection method comprises:

[0024] Step S10: judging the producing degree of each part of the horizontal well section;

[0025] Step S20: Injecting steam into the horizontal well section;

[0026] Step S30: continue to inject steam into the part with low production degree of the horizontal well section, and inject inert gas into the part with high production degree of the horizontal well section....

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Abstract

The invention provides a steam injection method for a heavy oil thermal recovery well. The thermal recovery well comprises a vertical well section and a horizontal well section connected with the vertical well section. The steam injection method comprises the steps that S10, the producing degree of each part of the horizontal well section is judged; S20, steam is injected into the horizontal wellsection; and S30, steam continues being injected into the part, with the low producing degree, of the horizontal well section, and inert gas is injected into the part, with the high producing degree,of the horizontal well section. By applying the technical scheme, the problem that the recovery effect is poor due to the unbalanced producing degree of a heavy oil thermal recovery horizontal well inthe prior art can be solved.

Description

technical field [0001] The invention relates to the technical field of oil field recovery, in particular to a steam injection method for heavy oil thermal recovery wells. Background technique [0002] At present, heavy oil thermal recovery horizontal wells are mostly exploited by steam huff and puff. The theoretical basis of using horizontal well huff and puff to improve development effect is that long horizontal section can increase the contact area between steam and oil layer and increase the drainage area. Horizontal wells for thermal recovery of heavy oil generally adopt the completion method of open-hole screens, that is, the horizontal section of the horizontal well is drilled into the oil layer without any cementing measures to form an open-hole wellbore. In the open hole wellbore, the slotted screen is run in the whole well section, and the unslotted dead-leg section is rarely run in the well. Fluids such as crude oil and water flow into the open wellbore from the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/24E21B43/16
CPCE21B43/164E21B43/168E21B43/24
Inventor 黄伟强吕其军马新明
Owner PETROCHINA CO LTD
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