Method for determining oil pumping machine well system parameter

A technology for pumping wells and system parameters, which is applied to earthwork drilling, mechanical equipment, wellbore/well components, etc., can solve the problem of not fully considering the influence of the instantaneous transmission efficiency of the pumping well system, not fully considering the influence of the gas phase, and not Fully consider load characteristics and other issues to achieve the effect of improving production management level, wide application and improving system efficiency

Active Publication Date: 2007-01-24
PETROCHINA CO LTD
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Problems solved by technology

Some have also established a two-dimensional simulation model, but in shallow wells, high stroke times, and low compressibility of oil well fluids, the calculation accuracy is relatively poor, and there are still certain limitations when used in energy-saving pumping wells in my country
Although some 3D simulation models have been established, they have not fully considered the spec

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  • Method for determining oil pumping machine well system parameter
  • Method for determining oil pumping machine well system parameter
  • Method for determining oil pumping machine well system parameter

Examples

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example 1

[0093] Well No. 1: The basic data of the oil well are: the depth of the middle part of the oil layer is 1865m, the density of crude oil is 0.88, the viscosity of crude oil is 26.76mPa·s, the stroke is 2.6m, and the stroke frequency is 5.12min -1 , pump depth 1200.58m, pump diameter 38mm, liquid production rate 17t / d, dynamic liquid surface 1048m, water content 91.2%, oil pressure 0.96MPa, casing pressure 0.2MPa, pumping unit model CYJ10-5-53HB (according to pumping Pumping unit geometric dimensions can be obtained from the pumping unit model), the rated power of the motor is 18.5kW; the D-class sucker rod combination is Φ25mm×252.94m+Φ22mm×337.36m+Φ19mm×593.8m, and the inner diameter of the tubing is Φ62mm.

[0094] ①The parameter values ​​currently used by the well: stroke 2.6m, stroke frequency 5.12min -1 , pump diameter 38mm, pump depth 1200m, sucker rod diameter and length combination Φ25mm×252.94m+Φ22mm×337.36m+Φ19mm×593.8m, motor installed power 18.5kW and other variable...

example 2

[0122] Well No. 2: The basic data of the oil well are: the depth of the middle part of the oil layer is 2000m, the density of crude oil is 0.86, the viscosity of crude oil is 4mPa·s, the stroke is 2m, and the stroke frequency is 9.11min -1 , pump depth 1512m, pump diameter 38mm, liquid production rate 22.11t / d, dynamic liquid surface 1018m, water content 64.5%, oil pressure 0.3MPa, casing pressure 0.4MPa, pumping unit model CYJ10-3-53HB (according to pumping Pumping unit geometric dimensions can be obtained from the pumping unit model), the rated power of the motor is 18.5kW; the D-class sucker rod combination Ф22mm×400m+Φ19mm×500m+Φ22mm×612m, the inner diameter of the oil pipe is Φ62mm.

[0123] ① The parameter values ​​currently used by the well: stroke 2m, stroke times 9.11min -1 , pump diameter 38mm, pump depth 1512m, sucker rod diameter and length combination Φ22mm×400m+Φ19mm×500m+Φ22mm×612m, motor installed power 18.5kW and other variable parameters, calculate the change...

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Abstract

Solving wave equation with damp calculates rate of change from swabbing parameters including stroke, number of strokes, diameter of pump, depth of pump, diameter and length of sucker rod etc. to system effectiveness. Sorting rate of change is carried out according to magnitude of absolute value. Under limiting conditions of well yield, load, torque moment etc, analyzing degree of sensitivity of swabbing parameters, the invention optimizes a group of optimal swabbing parameters for oil pumping well system. The method can calculate out polished rod horsepower, efficiencies of sucker rod, and oil pipe difficult to calculate out before. Carrying out quantitative analysis for each factor affecting system effectiveness, the invention solves issue of designing complex parameters so as to raise system effectiveness. The invention is applicable to oil pumping well system composed of inclined well or straight well, different typed pumping units and electric motor.

Description

technical field [0001] The invention relates to a mechanical oil extraction technology in oil extraction. Background technique [0002] In the design of oil production process parameters of pumping wells, the past theories mostly used the regression analysis method to establish the pumping well system efficiency and stroke, stroke times, pump diameter, pumping depth, lifting height, pump efficiency, motor rated power, etc. The relationship between parameters, the established mathematical model is only applicable to specific blocks and specific technical equipment conditions. In the analysis and calculation of the system efficiency (including the efficiency of each classification), such as the input power of the motor, the power of the polished rod, the efficiency of the sucker rod, and the oil pipe, etc. are difficult to calculate, and the workload of the on-site test and analysis is too large to be popularized and applied in a large area. It is also impossible to quantitat...

Claims

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Application Information

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IPC IPC(8): E21B43/00F04B47/00
Inventor 郭吉民张建军张胜利谢江
Owner PETROCHINA CO LTD
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