Oil Production Method and Well Pattern Layout Structure

A well pattern and oil reservoir technology, applied in the direction of production fluid, earthwork drilling and production, wellbore/well components, etc., can solve the problems of increased oil treatment costs, small increase in economic benefits, high injection costs, etc., and achieve heat utilization The effect of reducing the rate, restraining the gas channeling phenomenon, and reducing the viscosity

Active Publication Date: 2019-10-11
PETROCHINA CO LTD
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Problems solved by technology

However, if the above method is used for long-term mining, not only the injection cost will be high, but also the oil treatment cost will increase accordingly, resulting in a small increase in the economic benefits of development, and further causing formation pollution, which will bring great difficulties to subsequent mining

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  • Oil Production Method and Well Pattern Layout Structure
  • Oil Production Method and Well Pattern Layout Structure
  • Oil Production Method and Well Pattern Layout Structure

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Embodiment Construction

[0037] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art Modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is only for the purpose of describing specific embodiments, and is not intended to limit the application.

[0039] It should be noted that when an element is referred to as being “d...

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Abstract

The invention discloses an oil production method and a well network arrangement structure thereof. The oil production method comprises the steps that an injection pipe column is put into an injection well in the preset well network structure after well completion of a target oil reservoir, and production pipe columns are put into production wells; air in a first time period is injected into an oil sleeve annulus of the injection well at a first injection speed to enable crude oil in the target oil reservoir and the air to be subjected to an oxidation reaction; after a second time period, water of a preset temperature in a third time period is injected into upper branched horizontal wells of the injection well at a second injection speed; after a fourth time period, oil production is conducted in the production wells; and water of a preset temperature is injected into upper branched horizontal wells of the injection pipe column by a preset cycle, and air is injected into the oil sleeve annulus of the injection well for continuous production. By adoption of the oil production method and the well network arrangement structure thereof, deep common thick oil can be economically and effectively produced.

Description

technical field [0001] The invention relates to the field of heavy oil exploitation, in particular to an oil extraction method and a well pattern layout structure thereof. Background technique [0002] Heavy oil refers to high-viscosity heavy crude oil with a viscosity greater than 100 mPa.s (milliPa.s) under formation temperature and degassed conditions. According to the size of the viscosity, it can be divided into ordinary heavy oil (100 to 10000mPa.s), extra heavy oil (10000 to 50000mPa.s) and super heavy oil (greater than 50000mPa.s). In the oil extraction of oil fields, due to the special characteristics of high viscosity and high freezing point of heavy oil, the fluidity in the reservoir and the wellbore is poor, and the recovery rate of conventional extraction is low, that is, the normal economic output cannot be guaranteed. In order to ensure a reasonable recovery rate, oil is often recovered by reducing the viscosity of crude oil. [0003] The heavy oil recovery ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/16E21B43/20E21B43/30
Inventor 张洪君于晓聪郝瑞辉徐厚英于广刚王淑刘满军朱沛沛刘凯郭欣欣
Owner PETROCHINA CO LTD
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