Parameter adjusting method and system for improving system efficiency of rod-pumped well

A technology for pumping wells and system efficiency, applied in the fields of earth-moving drilling, wellbore/well components, and production fluids, etc. question

Active Publication Date: 2014-01-08
PETROCHINA CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, the current system efficiency benchmarking method cannot fairly evaluate the system efficiency level of different types of oil we

Method used

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  • Parameter adjusting method and system for improving system efficiency of rod-pumped well
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  • Parameter adjusting method and system for improving system efficiency of rod-pumped well

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specific Embodiment approach

[0087] The technical solutions of the present invention will be described in further detail below in conjunction with specific embodiments. The specific embodiment of the present invention comprises the following steps:

[0088] Step 1: Draw the pumping well system efficiency evaluation map

[0089] (1) Determine the horizontal and vertical coordinates of the evaluation chart

[0090] Oil well system efficiency consists of surface efficiency and downhole efficiency, namely η 系统 =η 地面 ×η 井下 . where the ground efficiency η 地面 Affected by controllable factors such as whether the equipment selection is reasonable, whether the pumping unit is balanced, belt tightness and bearing lubrication; downhole efficiency η 井下 It is comprehensively affected by inherent and controllable factors such as reservoir liquid supply capacity, fluid properties, wellbore trajectory, pumping depth, stroke, stroke times, pump diameter, etc.

[0091] When the controllable factors reach the optimal ...

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Abstract

The invention discloses a parameter adjusting method and system for improving the system efficiency of a rod-pumped well. The method comprises the steps that the downhole equivalent efficiency and the equivalent system efficiency are determined according to the ground efficiency of a pumping well system, the ground efficiency ideal value, the downhole efficiency of the pumping well system and the downhole efficiency ideal value, and an efficiency evaluation map of the pumping well system is established; the area is divided when the equivalent efficiency in the efficiency evaluation map of the pumping well system is smaller than the downhole equivalent efficiency according to the preset ground equivalent efficiency and the preset downhole equivalent efficiency; the active power, the polished rod loads, the stroke, the stroke frequency, the liquid production capacity of a single well pumping well, the dynamic liquid depth of the single well pumping well, wellhead oil pressure data and wellhead casting pressure data are collected to determine the downhole equivalent efficiency of a single well and the equivalent system efficiency of the single well, determine the area dividing positions of the single well in the evaluation map, and adjust the parameters of the pumping well system. The system efficiency level of different type pumping wells is evaluated fairly, and the method for improving the system efficiency of the pumping well is provided.

Description

technical field [0001] The invention relates to the technical field of pumping wells in oil fields, and specifically relates to a parameter adjustment method and system for improving the efficiency of the pumping well system. Background technique [0002] Pumping unit oil recovery is the most important oil recovery method in my country and even in the world. More than 90% of oil wells in my country use pumping unit for oil recovery. The pumping well system consists of a surface system and a downhole system. The surface system includes motors, belts, gearboxes and four-bar linkages; the downhole system includes packing, sucker rods, oil pipes, oil well pumps and liquid supply reservoirs. Due to the large number of mechanical transmission units, each link will cause energy loss, and the energy consumption of pumping wells is huge. The annual power consumption of pumping wells in my country is nearly 30 billion kWh. The index to measure whether the pumping well is energy-savi...

Claims

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Application Information

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IPC IPC(8): E21B43/00
Inventor 师俊峰张建军赵瑞东马文明张鑫朱拾东孙慧峰刘猛刘炎
Owner PETROCHINA CO LTD
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