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Intelligent interval pumping control system of oil field beam-pumping unit and control method thereof

A technology of a beam pumping unit and a control system, which is applied to the automatic control system of drilling, earthwork drilling and production, and production fluids, etc. It can solve problems such as inability to achieve high-efficiency operation, low efficiency of the mechanical production system, and production decline, and achieve The effect of solving the decline in production, solving the low efficiency of the mechanical mining system, and efficient operation

Pending Publication Date: 2020-01-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides an intelligent inter-pumping control system and control method for beam pumping units in an oil field. Solve the problems of production decline and low efficiency of mechanical recovery system caused by low liquid volume oil wells being drained in between

Method used

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  • Intelligent interval pumping control system of oil field beam-pumping unit and control method thereof
  • Intelligent interval pumping control system of oil field beam-pumping unit and control method thereof
  • Intelligent interval pumping control system of oil field beam-pumping unit and control method thereof

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no. 1 approach

[0054] The first embodiment of the present invention relates to an intelligent inter-pumping control system for beam pumping units in oilfields, such as figure 1 As shown, it includes a database server 10, a host computer 11, a well site RTU 12 and a controller 8 that are electrically connected in sequence. The controller 8 is electrically connected to the display 9 and the motor 1. The motor 1 is connected to and drives the beam pumping unit 2. The donkey head of the beam pumping unit 2 is connected to the polished rod 3, the motor 1 is equipped with a speed sensor 4 and an electric parameter sensor 5, a crank position sensor 6 is installed on the crank of the beam pumping unit 2, and a load displacement sensor 7 is installed on the polished rod 3;

[0055] The rotational speed sensor 4 , the electric parameter sensor 5 , the crank position sensor 6 and the load displacement sensor 7 are respectively connected with the controller 8 .

[0056] Specifically, the database server...

no. 2 approach

[0060] Different from the first embodiment, in this embodiment, the electric parameter sensor 5 includes a voltage sensor for measuring the voltage of the motor 1 , a current sensor for measuring the current of the motor 1 , and a power factor sensor for measuring the power factor of the motor 1 .

[0061] In addition, further, the following data are stored in the database server 10: the allowable value P of intermittent pumping and menstrual stop, the daily production fluid V of the oil well 日产液 , crude oil volume water content n w , the density of water ρ w , the density ρ of crude oil without water o , casing inner diameter ф 套 , tubing outer diameter ф 油 , oil well pump diameter D p , stroke S, sprint n 冲 , stroke loss λ, oil well pump leakage Q 漏 , the gas-liquid ratio R at the pump suction port, the pump clearance volume coefficient K, and the submerged pressure P of the well pump s , the discharge outlet pressure P of the well pump d , the variable process index...

no. 3 approach

[0064] On the basis of the intelligent inter-pumping control system of the beam pumping unit in the oil field, the present invention also protects a control method utilizing the intelligent inter-pumping control system of the beam pumping unit in the oil field, which specifically includes the following steps:

[0065] In step S1, the upper computer 11 calls the data stored in the database server 10, and calculates the initial value of the thinning system according to the called data;

[0066] Step S2, the initial value of the thinning system is sent to the well site RTU12 by the host computer 11, and the controller 8 retrieves the initial value of the thinning system from the well site RTU12;

[0067] In step S3, the controller 8 draws a polished rod indicator diagram according to the load displacement data transmitted by the load displacement sensor 7, and reflects it on the display 9;

[0068] Step S4, the controller 8 draws the electric power diagram of the motor according ...

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Abstract

The invention provides an intelligent interval pumping control system of an oil field beam-pumping unit and a control method thereof. Based on analysis of a crank position, a motor rotating speed andan electric parameter monitoring of the beam-pumping unit, an interval pumping system capable of ensuring efficient operation of a low-liquid-amount oil well is calculated through a polish rod indicator diagram inverted by an electric work diagram and a controller comprehensive analysis, the interval pumping system is output to the motor for execution so as to realize intelligent pumping control of the beam-pumping unit. In addition, the intelligent interval pumping control system of the oil field beam-pumping unit and the control method thereof mainly modify the electric work diagram throughthe polish rod indicator diagram, the fullness degree of the modified electric work diagram reaches a certain lower limit value, and meanwhile, the proportion of the number of the electric work diagram in all electric work diagram in an interval period reaches a specific target value at the same time, namely the interval pumping system / period is reasonable, further, the low-liquid-amount oil wellcan conduct interval pumping of oil extraction according to the interval pumping period, efficient operation of the pumping unit is achieved, and meanwhile, the problems that the yield is reduced andthe efficiency of a machine extraction system is low are solved.

Description

technical field [0001] The invention belongs to the technical field of oil production in oil fields, and in particular relates to an intelligent inter-pumping control system and a control method for beam pumping units in an oil field. Background technique [0002] In the process of oil recovery, when the penetration capacity of the oil well is lower than the design pumping capacity of the pumping unit, the oil well is in a state of insufficient fluid supply. In order to save electric energy, reduce the mechanical wear of the pumping unit, and improve the efficiency of the equipment, the control method generally adopted at present is to carry out automatic intermittent control on the pumping unit, that is, when it is detected that the oil well is in a state of insufficient fluid supply, the pumping unit is controlled. Stop the operation, enter the countdown state, and wait for the natural recovery of the dynamic liquid level of the oil well; when the predetermined downtime is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/12E21B44/00E21B47/00E21B47/06G06Q50/02
CPCE21B43/121E21B43/127E21B44/00E21B47/00E21B47/06G06Q50/02
Inventor 张岩刘涛刘天宇李大建辛宏姚洋石海霞牛彩云陆梅甘庆明康雁飞
Owner PETROCHINA CO LTD
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