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Multi-element thermal fluid production process for heavy oil reservoir and thermal recovery process

A technology of multi-component thermal fluid and thermal recovery technology, which is applied in the direction of mining fluid, earthwork drilling, isolation devices, etc., can solve problems such as the inability to adjust the composition of multiple thermal fluids, and the effect cannot be guaranteed, so as to reduce supporting equipment and reduce occupation The effect of increasing the floor area and increasing the amount of steam absorption

Active Publication Date: 2015-07-22
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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  • Multi-element thermal fluid production process for heavy oil reservoir and thermal recovery process

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Embodiment Construction

[0024] 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.

[0025] 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 multi-element thermal fluid production process for a heavy oil reservoir and a thermal recovery process. The multi-element thermal fluid production process includes the steps: respectively producing water vapor, carbon dioxide and nitrogen; and then mixing, in volume percent, 40%-90% of the produced water vapor, 0-30% of the produced carbon dioxide and 0-30% of the produced nitrogen into multi-element thermal fluids. The multi-element thermal fluid production process has the advantages of simplicity, convenience and flexibility, components of the multi-element thermal fluids can be adjusted within a wide range, and an injection process can be optimized.

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. However, 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....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/24E21B43/22E21B36/00
Inventor 孙永涛林涛刘海涛马增华孙玉豹张伟顾启林
Owner CHINA NAT OFFSHORE OIL CORP
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