Method and device for controlling oil production and fluid production

A control method and control device technology, which is applied in the directions of measurement, fluid extraction, earthwork drilling, etc., can solve the problems that oil and water wells cannot maintain high-efficiency and stable production for a long time, so as to improve development efficiency, avoid damage and high-efficiency production process Effect

Active Publication Date: 2021-06-18
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for controlling oil production and liquid production to solve the problem that oil and water wells cannot maintain high-efficiency and stable production for a long time in the prior art

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  • Method and device for controlling oil production and fluid production
  • Method and device for controlling oil production and fluid production
  • Method and device for controlling oil production and fluid production

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Embodiment Construction

[0035] Under the condition of sufficient liquid supply, the greater the drop in the dynamic liquid level of the oil-water well, the higher the production; but after considering the physical properties and pressure of the formation, the production has an inflection point, beyond this inflection point, the rock cemented skeleton breaks, the formation produces sand, and the production is low. It will increase again, but become smaller; continue to enlarge the production, due to the excessive drop of the liquid level, the negative pressure at the bottom of the well will increase, and the light one will lead to the destruction of the interlayer, causing interlayer channeling, and the production will drop; the severe one will cause the oil-water well casing Tube damaged and scrapped. The bottom hole negative pressure is generally used for perforation or plugging removal. The basic principle is to use the pressure of the wellbore fluid column to be lower than the reservoir pressure, s...

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Abstract

The invention relates to a method and device for controlling oil production and liquid production, which belong to the technical field of oil and water well development information construction. The maximum negative pressure Δp is calculated according to the physical parameters of the production layer, and the maximum negative pressure Δp is the negative pressure that promotes the migration of particles. Pressure critical value; calculate the dynamic liquid level height Δh corresponding to the maximum negative pressure Δp according to the pressure balance relationship; calculate the liquid level drop depth s in the oil-water well according to the dynamic liquid level height Δh; select Q according to the formation conditions of the production layer ‑s model, substituting the liquid level drop depth s into the selected Q‑s model to obtain the liquid production rate corresponding to the maximum negative pressure Δp; producing with the liquid production rate to solve the problem that oil and water wells cannot be maintained for a long time in the prior art Efficient and stable production issues.

Description

technical field [0001] The invention relates to a method and device for controlling oil production and liquid production, and belongs to the technical field of oil and water well development information construction. Background technique [0002] In the actual production process of the oil field, in order to maximize the industrial output and obtain the highest output during fixed production production, the pumping unit needs to adjust its pumping frequency according to the changing parameters of the oil well to make it work reasonably state. However, in the existing production process, a suitable liquid extraction system is usually established for production according to the size of the production pressure difference. According to the production pressure difference, the greater the drop in the dynamic liquid level of the oil-water well, the higher the oil production rate according to the Q-s model, but the actual situation is that the drop in the liquid level will lead to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00E21B47/00
CPCE21B43/00E21B47/00
Inventor 刘正奎冯兴武李军杨琪李晓平郑桐李梦楠
Owner CHINA PETROLEUM & CHEM CORP
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