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Oil well intermittent pumping control system and method

A control system and control method technology, which is applied in pump control, earthwork drilling, wellbore/well components, etc., can solve the problems of not too much room for parameter adjustment, aggravated negative impact, and lengthened stroke, so as to reduce energy consumption, Effects of reduced loss and long communication distance

Active Publication Date: 2017-05-31
PETROCHINA CO LTD
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Problems solved by technology

[0004] Through oil well parameter adjustment, such as increasing the pump hanging depth to provide a larger production pressure difference; lengthening the stroke, slow filling, and small pump diameter can increase the liquid extraction volume of the oil well, but once it is difficult to adjust the parameters of the oil well, the parameter adjustment When the margin is not too large, the negative impact of prolonged oil pumping will be exacerbated

Method used

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  • Oil well intermittent pumping control system and method
  • Oil well intermittent pumping control system and method
  • Oil well intermittent pumping control system and method

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Embodiment

[0100] see figure 2 As shown, according to the interval pumping control simulation model, it can be calculated that the daily liquid production rate of the oil well is Q=1t / d. If the loss rate of the liquid production rate is to be less than 5%, see that the average flow rate of the inflow fluid and its drop rate during the pumping stop period are less than 14 Hours, normal pumping is greater than 8 hours.

[0101] Through simulation analysis, combined with the given allowable production decline limit, the longest pumping stop period and the corresponding pumping cycle can be determined.

[0102] The interval pumping system of oil wells with different liquid production rates is optimized based on the production decline rate not greater than 5%. The systems for different output ranges are:

[0103] When the production of the oil well is ≤1t / d, the accumulative shutdown time is 12 hours;

[0104] When the oil well production is 1t / d~1.5t / d, the accumulative pumping stop time...

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Abstract

The invention discloses an oil well intermittent pumping control system and method. The oil well intermittent pumping control system comprises an oil pumping unit, a controller and a motor, wherein the motor is connected with the oil pumping unit and used for driving the oil pumping unit; a rotational speed sensor and an electric parameter acquisition module are arranged on the motor and used for acquiring the output shaft rotational speed and the current and voltage value of the motor and sending to the controller; a load sensor and a displacement sensor are arranged on the oil pumping unit, connected with the controller and used for sending measured values of the load and the displacement of a well sucker rod of the oil pumping unit to the controller; and the controller is connected with the motor through a frequency converter and used for controlling start and stop of the motor. According to the oil well intermittent pumping control system, reasonable control is performed according to actual liquid outlet conditions, the requirement for supply and production coordination of an oil well is satisfied, intelligent stroke frequency adjustment and intelligent dynamic interval pumping control are utilized to realize energy saving and consumption reduction of the oil well and to reduce the loss of running equipment, follow-up control meets the demand for precise control of the oil well within a stroke cycle, the running efficiency of an oil well system is further improved, and the energy consumption is reduced.

Description

【Technical field】 [0001] The invention belongs to the field of digital equipment of a mechanical mining system, and in particular relates to a control system and method for intermittent oil pumping of a beam pumping unit. 【Background technique】 [0002] For wells with insufficient liquid supply, low production and low efficiency, and low permeability wells in the middle and late stages of production, with the continuous reduction of formation pressure, the phenomenon of insufficient liquid supply capacity of oil wells is very common. Due to the unbalanced supply and discharge, the pumping unit has been in low efficiency for a long time In the working state, the energy waste is serious, and the ineffective wear and tear of the equipment is intensified, resulting in low economic benefits, and many low-efficiency or even "negative benefit" mechanical oil production wells. How to make pumping units work efficiently and energy-saving has become an urgent problem to be solved. que...

Claims

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Application Information

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IPC IPC(8): F04B49/06E21B43/00
CPCE21B43/121E21B43/127F04B49/065
Inventor 辛宏周志平黄伟陆梅韩二涛李大建杨海涛张岩刘涛周杨帆邱亮韩利宝
Owner PETROCHINA CO LTD
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