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Method for electric submersible pump well working fluid level calculation based on ground real-time monitoring electrical parameters

A submersible electric pump, ground measurement technology, applied in the direction of calculation, electric digital data processing, design optimization/simulation, etc., can solve the problem that the dynamic liquid level cannot be monitored in real time.

Active Publication Date: 2017-05-31
CHINA UNIV OF PETROLEUM (EAST CHINA)
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AI Technical Summary

Problems solved by technology

The purpose of the present invention is to calculate the dynamic liquid level of the electric submersible pump well, so as to solve the problem that the dynamic liquid level of the electric submersible pump well cannot be monitored in real time, realize the intelligent management and real-time optimized operation of the oil well, and improve the production efficiency and benefit of the oil well

Method used

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  • Method for electric submersible pump well working fluid level calculation based on ground real-time monitoring electrical parameters
  • Method for electric submersible pump well working fluid level calculation based on ground real-time monitoring electrical parameters
  • Method for electric submersible pump well working fluid level calculation based on ground real-time monitoring electrical parameters

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Embodiment 1

[0060] Step 1: Using the "four-stage method" to establish a calculation model for the wellbore fluid temperature of a submersible electric pump well

[0061] During the production process of electric submersible pump wells, the thermal radiation of gas above the liquid surface in the oil casing annulus, the heat conduction of liquid below the liquid surface, and the heating of motors and cable equipment affect the temperature and flow law of the wellbore fluid. Based on the actual physical model of the electric submersible pump well, the following assumptions are put forward:

[0062] (1) The heat transfer process is a steady-state heat transfer process in the wellbore and an unsteady-state heat transfer process in the formation;

[0063] (2) The flow in the well is one-dimensional steady flow;

[0064] (3) The formation temperature around the wellbore is affected by the geothermal gradient and changes linearly with depth;

[0065] (4) The cable is a linear heat source with ...

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Abstract

The invention discloses a method for electric submersible pump well working fluid level calculation based on ground real-time monitoring electrical parameters. The method comprises the following steps: considering the effects, such as the gas thermal radiation above the fluid level in an oil sleeve ring, the liquid heat conduction below the fluid level, and the heating of a motor and a cable, constructing a four-stage electric submersible pump well shaft fluid temperature calculation model; and researching and analyzing real-time monitoring ground electrical parameters, the internal relations of submersible motor input power, the pump lift and the pump inlet pressure, and the operating characteristic of the electric submersible pump, and deriving an electric submersible pump well working fluid level calculation model based on the ground real-time monitoring electrical parameters. The method is used for forecasting the electric submersible pump well working fluid level, and providing the theory and technical support to the intelligent management and real-time optimization of the electric submersible pump well.

Description

technical field [0001] The invention relates to a method for calculating the dynamic liquid level of a submersible electric pump well based on electrical parameters measured on the ground, and belongs to the technical field of computerized oil field information construction. Background technique [0002] The submersible electric pump lifting technology is the main way to maintain or increase the production of oil wells, and its dynamic liquid level is an important data for judging the liquid supply capacity of oil wells and analyzing the production status of oil wells. At present, real-time monitoring of surface electrical parameters and wellhead oil pressure, back pressure, casing pressure, temperature and other data of electric submersible pump wells has been realized, but the dynamic fluid level cannot be monitored in real time, and the sonic method is still used, which is regularly monitored manually. It meets the needs of intelligent analysis and real-time optimization ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50E21B47/047
CPCE21B47/047G06F30/20
Inventor 陈德春吕飞姚亚孟红霞肖良飞张舒心赵腾飞
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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