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Optimum stroke process suitable for super-low permeability reservoir digital oil pumping unit

A technology of optimal stroke times and process methods, applied in earthwork drilling, self-adaptive control, mining fluids, etc., can solve problems such as high risk of electrokinetics, heavy installation workload, hot fire on site in oil fields, etc., and achieve extended inspection Pump cycle, low maintenance cost, energy saving effect

Active Publication Date: 2015-11-25
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The digital pumping unit is developed to solve the problems of large installation workload, difficult field construction, hot fire in the oil field, high risk of electrodynamics, low equipment integration, and inconsistent installation methods of various construction units in the current digital construction site construction. New product

Method used

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  • Optimum stroke process suitable for super-low permeability reservoir digital oil pumping unit
  • Optimum stroke process suitable for super-low permeability reservoir digital oil pumping unit
  • Optimum stroke process suitable for super-low permeability reservoir digital oil pumping unit

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Experimental program
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Effect test

Embodiment 1

[0049] Embodiment 1: as figure 1 , figure 2 , image 3 as shown,

[0050] In practical applications, it is difficult for the wellhead RTU to obtain the theoretical pump power diagram, so the surface power diagram is used to approximate the pump fullness. An example of calculating the pump fullness from the actual work diagram is as follows:

[0051] by figure 2 Take the dynamometer diagram as an example. Through approximate calculation, the load value of the load line at the top dead point is 33.83kN, and the load value of the load line at the bottom dead point is 22.82kN. The effective stroke, The approximate effective stroke during the downstroke is:

[0052] AD=2.507-2.53=2.254; ADx=1.357-0=1.357;

[0053] The approximate value of pump fullness calculated from this is: b=ADx / AD=1.357 / 2.254=60%;

[0054] 3. Flow chart of stroke frequency adjustment;

[0055] The flow chart is attached image 3 .

[0056] Setting parameters:

[0057] Fmin, Fmax—minimum and maximu...

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Abstract

Provided is an optimum stroke process suitable for a super-low permeability reservoir digital oil pumping unit, belonging to the technical field of oil field digitalization. The process includes that the oil pumping unit stroke is determined and adjusted; and the optimum stroke is automatically found based on the production capacity of an oil well under the condition of guaranteeing the production capacity, the stroke is adjusted to the minimum to achieve the optimum work state, and the self-adjustment and the remote manual adjustment can be realized. The process is particularly suitable for the condition of a super-low permeability oil field low-production well, the low-production well can be continuously pumped, the pump inspection period is prolonged, the service lives of a sucker rod and the oil pumping unit are prolonged, the management is convenient, and the maintenance cost is low. The process can be applied to various types of oil pumping units, such as a compound oil pumping unit or a camber beam variable torque oil pumping unit, the low-stroke operation can be realized, the oil pumping unit stroke is changed by adjusting the variable frequency, the pump fullness and the approximate production capacity are calculated to make the production capacity the largest, and meanwhile, energy can be saved.

Description

technical field [0001] The invention relates to an optimal stroke process method for a digital pumping unit suitable for ultra-low permeability reservoirs, and belongs to the technical field of oilfield digitalization. Background technique [0002] Since the promotion and implementation of digital oilfields in oilfields, pumping units, as the main equipment and energy-consuming households in oilfield development, have received great attention. The digital pumping unit is developed to solve the problems of large installation workload, difficult field construction, hot fire in the oil field, high risk of electrodynamics, low equipment integration, and inconsistent installation methods of various construction units in the current digital construction site construction. New product. The digital pumping unit is required to meet the following functions: [0003] (1) The system should have the function of automatic collection of oil well load, displacement and three-phase electri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04E21B43/00
Inventor 程世东单吉权马建军付钢旦杨世海于志刚丑世龙操红梅李珍孟繁平刘峰张彬邱亮
Owner PETROCHINA CO LTD
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