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Calculation method of submergence degree, oil recovery method and oil recovery system

An oil extraction system and calculation method technology, applied in the oil field, can solve the problems of production change, high cost per machine, and unrealistic configuration of one testing device.

Active Publication Date: 2021-08-13
青岛新胜石油机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But generally speaking, oil fields only come to the site for a test every once in a while, the purpose is to check whether there is any change in the oil layer of the well, resulting in a change in production
Due to the relatively high unit cost of this equipment, it is unrealistic to equip each well with such a detection equipment

Method used

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  • Calculation method of submergence degree, oil recovery method and oil recovery system
  • Calculation method of submergence degree, oil recovery method and oil recovery system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] This embodiment provides a method for calculating the submergence degree of an oil well pump, which mainly utilizes the upward pulling force and downward pulling force of the sucker rod, and the steps mainly include the derivation process of the formula and the solution of the input formula.

[0072] Specifically, the derivation process is as follows:

[0073] Such as figure 1 and figure 2 , the upward pulling force of the sucker rod and the said downward pulling force are denoted by F 上 and F 下 To represent;

[0074] f 上 =F 柱塞上 -F 液面上 +F 杆 +F 摩擦上 +F 流体阻力上

[0075] f 下 =F 柱塞下 -F 液面下 +F 杆 -F 摩擦下 -F 流体阻力下

[0076] f 柱塞上 : During the upward movement, the weight of the plunger to the wellhead fluid column

[0077] f 柱塞下 : The weight of the fluid column from the plunger to the wellhead during the descending process

[0078] f 液面上 : The weight of the liquid column from the liquid level inside the tubing to the bottom of the plunger during the upward mov...

Embodiment 2

[0104] The present embodiment provides a kind of oil recovery method, it comprises the following steps:

[0105] a. Set the upper limit, lower limit and lower limit of the submergence degree; the selection of the upper limit and the lower limit can adopt the following method,

[0106] After the oil production system has been running for a period of time and the liquid level in the oil pipe reaches a relatively stable state, the current submergence is determined by means of acoustic wave measurement, and then input into the oil production control system. Then set the upper limit, lower limit and lower limit of the submergence degree of oil recovery in the control system.

[0107] b. Use the oil well pump submergence technical method provided in Example 1 to measure the submergence in real time, and adjust the stroke times.

[0108] c. When the degree of sinking is greater than the upper limit, reduce the waiting time and increase the number of strokes; when the degree of sinki...

Embodiment 3

[0110] This embodiment provides an oil recovery system, the oil recovery system includes a dynamometer, a controller and an oil well pump, and the controller can perform the oil recovery method in Embodiment 2; the dynamometer adopts a bearing seat type dynamometer, It can measure the upward tension and downward tension of the sucker rod; and transmit the data to the controller in real time.

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Abstract

The invention provides a submergence degree calculation method, an oil recovery method and an oil recovery system, which belong to the technical field of oil recovery. The calculation method of the submergence degree of the oil well pump mainly uses the upward pulling force and the downward pulling force of the sucker rod, and the steps mainly include the derivation process of the formula and the solution brought into the formula. The oil recovery method is mainly based on the above-mentioned submergence degree technical method to obtain the submergence degree data in real time and adjust the system waiting time and stroke times according to the data, so as to realize the automation and intelligence of oil recovery. The dynamometer and controller of the above oil production system, because the dynamometer can collect the data of the upward and downward tension of the sucker rod, the controller can execute the above oil production method after obtaining the above data, so as to realize the automation and intelligence of oil production.

Description

technical field [0001] The invention relates to the field of petroleum technology, in particular to a method for calculating the submergence degree, an oil recovery method and an oil recovery system. Background technique [0002] In oil production operations, the submergence of the pump is a very important parameter: if the submergence is too high, the oil production will be low; The cost is increased, and the oil recovery efficiency is reduced, and the energy consumption is increased. Therefore, if the submergence data can be known in real time, for the ultra-long-stroke flexible oil recovery system, then the stroke times can be adjusted in real time to realize a fully intelligent oil recovery process. [0003] At present, there are many methods for measuring the liquid level in the oil pipe in the oil field, such as the method of acoustic wave measurement. But generally speaking, the oil field only goes to the site to conduct a test every once in a while. The purpose is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/14
CPCG06F30/20
Inventor 丁新建郭朝华
Owner 青岛新胜石油机械有限公司