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Steam Injection Method for Heavy Oil Thermal Recovery Wells

A heavy oil thermal recovery and steam injection technology, which is applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve problems such as poor production effect and unbalanced production degree, and solve the problem of poor production effect, Strong compression resistance and low gas solubility

Active Publication Date: 2021-11-02
PETROCHINA CO LTD
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  • Claims
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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 Wells
  • Steam Injection Method for Heavy Oil Thermal Recovery Wells

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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] like 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 heavy oil thermal recovery wells. The thermal recovery well includes a vertical well section and a horizontal well section connected to the vertical well section, and the steam injection method includes: step S10: judging the production degree of each part of the horizontal well section; step S20: injecting steam into the horizontal well section; 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. The application of the technical scheme of the invention can solve the problem of poor production effect caused by unbalanced production degree of heavy oil thermal recovery horizontal wells in the prior art.

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 ...

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Application Information

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Patent Type & Authority Patents(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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