Method for mining oil

A technology for oil reservoirs and horizontal wells, which can be used in the development of fluids, earth-moving drilling, wellbore/well components, etc., and can solve problems such as low oil production.

Inactive Publication Date: 2018-07-06
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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[0003] The main purpose of the present invention is to provide a method for

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  • Method for mining oil

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[0019] 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.

[0020] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0021] It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish simila...

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Abstract

The invention provides a method for mining oil. The method comprises the steps that horizontal well groups are set up according to an oil storage layer; steam is injected into the horizontal well groups to enable the oil storage layer to form a steam cavity; a vertical well is set up according to the oil storage layer; and carbon dioxide is injected into the vertical well to enable an oil body inthe oil storage layer to be discharged by the horizontal well groups. According to the method for mining oil, the output of the oil can be effectively increased.

Description

technical field [0001] The invention relates to the technical field of oil extraction, in particular to a method for oil extraction. Background technique [0002] In the field of existing oil production technology, the use of double horizontal well SAGD is an effective technology to improve the development of super-heavy oil reservoirs in shallow layers. The advantage of high yield. The SAGD development of dual horizontal wells has high requirements on reservoir conditions. The horizontal section of the SAGD well group with interlayers between wells I and P and above well I has low production degree, unbalanced development of steam chambers, and a decrease in the actual recoverable geological reserves of the well group, resulting in The problem of low productivity. Furthermore, as the production time increases, the remaining oil saturation gradually decreases, and the thermal efficiency of the steam decreases, facing the problem of no or little increase in steam increase, ...

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Application Information

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IPC IPC(8): E21B43/24E21B43/16
Inventor 孙新革桑林翔丁超王亮杨果刘名吕柏林肖武林
Owner PETROCHINA CO LTD
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