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A multi-component thermal fluid production process and thermal recovery process for heavy oil reservoirs

A multi-component thermal fluid and thermal recovery technology, which is applied in the fields of mining fluids, earthwork drilling, isolation devices, etc., can solve the problems of inability to adjust the composition of multi-component thermal fluids, and the effect cannot be guaranteed. Floor area, the effect of reducing heat loss

Active Publication Date: 2015-09-23
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, when developing different types of heavy oil reservoirs, it is still impossible to adjust the composition of the multi-component thermal fluid accordingly, so that the effect of the multi-component thermal fluid thermal recovery process in the development of high-viscosity heavy oil reservoirs cannot be guaranteed

Method used

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  • A multi-component thermal fluid production process and thermal recovery process for heavy oil reservoirs

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings, so that those skilled in the art can practice the present invention. It is to be understood that other embodiments may be utilized, and that appropriate changes may be made without departing from the spirit or scope of the invention. To avoid detail not necessary to enable those skilled in the art to practice the invention, the description may omit certain information known to those skilled in the art. Accordingly, the following detailed description should not be taken in a limiting sense, and the scope of the present invention is defined only by the appended claims.

[0033] The general principle of the present invention is explained below about a thermal recovery well of a certain offshore heavy oil reservoir in Bohai Bay as an example, but it should be noted that the present invention is by no means limited to thermal recovery wells of heavy oil reservoirs i...

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Abstract

The invention relates to a production process of a multi-element hot fluid used for thickened oil storage and a thermal recover process of the multi-element hot fluid. The production process of the multi-element hot fluid comprises the steps of pressurizing and separating air to obtain high-purity nitrogen and oxygen-enriched air; pressurizing the obtained oxygen-enriched air to generate a part of the multi-element hot fluid; and mixing the generated part of multi-element hot fluid with the obtained high-purity nitrogen. The production process of the multi-element hot fluid has the advantage that components are adjustable, multi-element hot fluids with different components can be designed according to different oil storage characteristics, and the application range of the thermal recovery process of the multi-element hot fluid is widened.

Description

technical field [0001] The invention relates to a multi-component thermal fluid production process and thermal recovery process for heavy oil reservoirs, and in particular to a multi-component thermal fluid production process and thermal recovery process for heavy oil reservoirs with adjustable composition. Background technique [0002] Heavy oil resources are widely distributed in my country, but heavy oil has high colloidal asphaltenes, high viscosity, poor fluidity and difficult production. In order to solve the problem of high-efficiency development of marine heavy oil, oilfield scientific and technological workers have developed a process for efficient development of heavy oil wells using multi-element thermal fluid huff and puff technology. [0003] The multi-component thermal fluid is a high-temperature fluid containing water (steam), nitrogen, carbon dioxide and chemical additives and other components, which is used for enhanced oil recovery in heavy oil fields. Dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/24E21B43/22E21B36/00
Inventor 刘义刚刘海涛山金城孙永涛林涛文权顾启林张玉久马增华
Owner CHINA NAT OFFSHORE OIL CORP
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