CN106351645B - Method and device for continuously measuring working fluid level of pumping well - Google Patents

Method and device for continuously measuring working fluid level of pumping well Download PDF

Info

Publication number
CN106351645B
CN106351645B CN201610941837.5A CN201610941837A CN106351645B CN 106351645 B CN106351645 B CN 106351645B CN 201610941837 A CN201610941837 A CN 201610941837A CN 106351645 B CN106351645 B CN 106351645B
Authority
CN
China
Prior art keywords
working fluid
fluid level
steps
sucker rod
stroke
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201610941837.5A
Other languages
Chinese (zh)
Other versions
CN106351645A (en
Inventor
金钟辉
庄贵林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Etrol Oil And Gas Technology Co ltd
Original Assignee
BEIJING ANKONG TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BEIJING ANKONG TECHNOLOGY Co Ltd filed Critical BEIJING ANKONG TECHNOLOGY Co Ltd
Priority to CN201610941837.5A priority Critical patent/CN106351645B/en
Publication of CN106351645A publication Critical patent/CN106351645A/en
Application granted granted Critical
Publication of CN106351645B publication Critical patent/CN106351645B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/04—Measuring depth or liquid level
    • E21B47/047—Liquid level

Abstract

The application discloses a method for continuously measuring the working fluid level of an oil pumping well, which can greatly improve the measurement precision. Which comprises the following steps: (1) analyzing the dynamic characteristics of the sucker rod, establishing a vibration model of the sucker rod string, and establishing a one-dimensional second-order partial differential equation for describing the motion of the sucker rod string; (2) iteratively calculating a damping coefficient by using a ground indicator diagram; (3) solving a suspension point load value at the acceleration of zero; (4) solving the working fluid level H of the oil well; (5) removing accidental errors and optimizing a calculation result; (6) and calibrating the working fluid level data of the oil well. Also provides a continuous measuring device for the working fluid level of the pumping well.

Description

Method and device for continuously measuring working fluid level of pumping well
Technical Field
The invention belongs to the technical field of automatic oil extraction, and particularly relates to a method and a device for continuously measuring the working fluid level of an oil pumping well.
Background
The working fluid level of the pumping well is an important parameter for reflecting the liquid supply capacity of the oil well and ensuring the safe and energy-saving production of the pumping well system. The existing oil well working fluid level measuring technology mainly depends on a sound wave reflection method, and the method mainly has the following problems that (1) if manual regular measurement is adopted, continuous measurement cannot be realized. (2) The online continuous measurement equipment has high cost, needs an external excitation source and has large energy consumption. (3) Due to the fact that the condition in the shaft is complex, when the working fluid level is too large in depth, interference factors are too much, and measuring accuracy is poor.
In recent years, due to the rapid development of sensor technology, the polished rod indicator diagram measuring technology is gradually common and has higher precision, so that the practical application of the indicator diagram calculating oil well working fluid level technology becomes practical. The dynamic liquid level of the oil well is solved through the upper static load and the lower static load of the oil well, the dynamic liquid level is difficult to solve in practical application, and once the working condition of the oil well changes, the static load measurement needs to be carried out again.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a method for continuously measuring the working fluid level of an oil pumping well, which can greatly improve the measurement precision.
The technical scheme for solving the problems is as follows: the continuous measurement method for the working fluid level of the pumping well is characterized in that: which comprises the following steps:
(1) analyzing the dynamic characteristics of the sucker rod, establishing a vibration model of the sucker rod string, and establishing a one-dimensional second-order partial differential equation for describing the motion of the sucker rod string;
(2) iteratively calculating a damping coefficient by using a ground indicator diagram;
(3) obtaining the load value of the suspension point at the zero acceleration of the down stroke and the up strokeFdAnd Fu；
(4) According to FdAnd FuSolving the liquid column load on the full plunger area of the working fluid level depth in the oil well, and further solving the working fluid level H of the oil well;
(5) removing accidental errors and optimizing a calculation result;
(6) and calibrating the working fluid level data of the oil well.
The method and the device provided by the invention can be used for optimizing the result and reducing the measurement error while realizing the real-time calculation of the working fluid level of the oil well, and can be used for calibrating by means of the external working fluid level data under the condition of external data, so that the measurement precision of the working fluid level of the oil well is further improved.
Still provide a beam-pumping unit well working fluid level continuous measurement device, it includes: the device comprises a diagram acquisition unit, a pressure acquisition unit and a data processing unit; the indicator diagram acquisition unit comprises a load sensor and an angular displacement sensor; the pressure acquisition unit comprises a back pressure measurement sensor and a sleeve pressure measurement sensor.
Drawings
FIG. 1 is a schematic diagram of a continuous measurement device for the working fluid level of a rod-pumped well according to the present invention.
FIG. 2 is a flow chart of a method for continuous measurement of the working fluid level in a rod pumped well according to the present invention.
Detailed Description
As shown in FIG. 2, the method for continuously measuring the working fluid level of the rod-pumped well is characterized in that: which comprises the following steps:
(1) analyzing the dynamic characteristics of the sucker rod, establishing a vibration model of the sucker rod string, and establishing a one-dimensional second-order partial differential equation for describing the motion of the sucker rod string;
(2) iteratively calculating a damping coefficient by using a ground indicator diagram;
(3) obtaining the suspension point load value F at the zero position of the acceleration of the down stroke and the up strokedAnd Fu；
(4) According to FdAnd FuSolving the liquid column load on the full plunger area of the working fluid level depth in the oil well, and further solving the working fluid level H of the oil well;
(5) removing accidental errors and optimizing a calculation result;
(6) and calibrating the working fluid level data of the oil well.
The method and the device provided by the invention can be used for optimizing the result and reducing the measurement error while realizing the real-time calculation of the working fluid level of the oil well, and can be used for calibrating by means of the external working fluid level data under the condition of external data, so that the measurement precision of the working fluid level of the oil well is further improved.
In addition, the one-dimensional second-order partial differential equation in the step (1) is a formula (1-3)
Figure GDA0002074366430000031
Wherein
Figure GDA0002074366430000032
Is the damping coefficient of the liquid in the well to the sucker rod, and the unit is s-1；
Figure GDA0002074366430000033
The propagation speed of the stress wave in the sucker rod is expressed in m/s.
In addition, the mathematical model for simulating the vibration of the sucker rod in the step (1) comprises the following steps: wave equation, boundary conditions, initial conditions, and continuity conditions.
In addition, the specific calculation formula of the damping coefficient in the step (2) is formula (1-16):
Figure GDA0002074366430000034
wherein
Figure GDA0002074366430000035
The stroke length of the polish rod is divided by the area integral of the upper stroke and the lower stroke of the polish rod indicator diagram respectively;
Figure GDA0002074366430000036
the pumping unit is obtained by dividing the area integral of the upper stroke and the lower stroke of a pump diagram by the pump stroke, wherein alpha is the structural coefficient of the pumping unit, and T is the period;
the convergence condition of equations (1-16) is:
Figure GDA0002074366430000037
wherein ε is the allowable error;
Figure GDA0002074366430000038
in addition, the step (3) comprises the following substeps:
(3.1) averaging the abscissa of any discrete point of the pump diagram by using a five-point averaging method
Figure GDA0002074366430000039
(3.2) by displacing the maximum and minimum values of the abscissa of the discrete point on the data:
Xmax,Xmin；
(3.3) carrying out normalization processing on the displacement of the pump work diagram;
Figure GDA0002074366430000041
(3.4) calculating the curvature value k of each discrete point on the pump diagram according to the formula (1-20)i
Figure GDA0002074366430000042
(3.5) averaging the curvatures by the five-point method
Figure GDA0002074366430000043
(3.6) k 'in the vertical stroke was obtained'iValue of i at 0, if k'i＞0,k′i+1< 0 or k'i+1＞0,k′i＜0
Then
Figure GDA0002074366430000044
Solve to FdAnd Fu。
In addition, the step (4) comprises the following substeps:
(4.1) solving the liquid column load W on the full plunger area of the working fluid level depth in the oil wellL
WL＝Fu-Fd-(Pt-Pc)×Ap (1—21)
Wherein P istThe well head back pressure is Pa; pcIs sleeve pressure, Pa; a. thepIs the area of the plunger, m2；
(4.3) solving the working fluid level H
Figure GDA0002074366430000045
In addition, the step (5) comprises the following substeps:
(5.1) solving the average value of the calculated working fluid level H of the last five times
Figure GDA0002074366430000046
Figure GDA0002074366430000047
(5.4) eliminating points with the relative error between the calculation result and the average value being more than 20 percent
(5.5) averaging the residual values to obtain the current working fluid level data H, if the relative errors of all the data are more than 20%, the calculation is failed, the current production condition of the oil well is unstable, and the calculation is carried out after 5 complete strokes are waited;
dynamic liquid level H for time point of failure of calculationiPerforming supplementary calculation according to the formulas (1-25),
Figure GDA0002074366430000051
in addition, the calibration of the working fluid level calculation in the step (6) adopts the combination of actually measured working fluid level data h of the oil welliCarry out calibration
Hbi＝μHi (1—26)
Figure GDA0002074366430000052
As shown in fig. 1, there is also provided a continuous measuring device for the working fluid level of a rod-pumped well, comprising: the device comprises a diagram acquisition unit, a pressure acquisition unit and a data processing unit; the indicator diagram acquisition unit comprises a load sensor and an angular displacement sensor; the pressure acquisition unit comprises a back pressure measurement sensor and a sleeve pressure measurement sensor.
The method comprises the steps of firstly, acquiring current load and angular displacement data of each stroke of an oil well and corresponding back pressure and casing pressure through a sensor. And forming a polished rod indicator diagram of the oil well by using the load data and the displacement data.
The present invention is described in detail below.
The embodiment of the invention provides a continuous measurement and calculation process of the working fluid level of an oil pumping well, which comprises the following steps:
【1】 Analyzing the dynamic characteristics of the sucker rod, establishing a vibration model of the sucker rod string, establishing a one-dimensional second-order partial differential equation, namely a wave equation, describing the motion of the sucker rod string, further solving the wave equation,
Figure GDA0002074366430000053
in the formula
Figure GDA0002074366430000054
Damping coefficient of well liquid to sucker rod, s-1；
Figure GDA0002074366430000055
The propagation speed of the stress wave in the sucker rod is m/s.
The sucker rod simulation vibration mathematical model comprises the following four aspects: wave equation, boundary conditions, initial conditions, and continuity conditions.
(1) Boundary condition
The boundary condition is determined according to the law of the motion of the suspension point of the pumping unit and can be solved according to the geometric motion characteristic of the pumping unit.
u(x,t)|x＝0＝u(t) (1-4)
(2) Initial conditions
Setting an initial moment, enabling the oil well pump piston to be located at a bottom dead center to prepare for moving upwards from the bottom dead center, and actually measuring the load and the displacement on the ground indicator diagram as initial conditions.
Figure GDA0002074366430000061
Wherein u (t) is the displacement of the actually measured ground indicator diagram; d (t) is the load of the actually measured ground indicator diagram; wrThe weight of the sucker rod string in the well fluid.
(3) Conditions of continuity
For multi-stage sucker rods with different diameters and different materials, the load and displacement continuity conditions of the junction of the two stages of rods and columns are as follows:
the mathematical model of the vibration simulation of the sucker rod string is obtained by the formulas (1-3), (1-4), (1-5) and (1-6):
Figure GDA0002074366430000063
judging whether the sucker rod is the last sucker rod or not, if so, calculating to obtain a displacement load relationship which is a pump diagram, and finishing the calculation; otherwise, calculating the second-stage rod column end u according to the force continuity principle2(xiT) and F2(xiAnd t) calculating sequentially until the tail end of the last lever, and obtaining the corresponding pump indicator diagram.
Solving a mathematical model wave equation of the vibration of the sucker rod string by adopting a Fourier series method:
and (3) respectively expanding D (t) and u (t) into Fourier series by taking a suspension point dynamic load function as D (t) and a polished rod displacement function u (t) as boundary conditions:
Figure GDA0002074366430000071
wherein N represents the number of Fourier series terms; sigmao,γo,σn,τn,vn,δn(N-1, 2, …, N) represents a fourier coefficient, and w represents a crank angular velocity.
The Fourier coefficient of the change of the dynamic load and the displacement of the sucker rod is obtained by the numerical integration of the actually measured D (t) curve and u (t) curve:
Figure GDA0002074366430000072
Figure GDA0002074366430000073
where N is 0,1,2,.., N, d (p) and u (p) are the load and displacement, respectively, of discrete points of the indicator diagram.
And (1-7) is taken as a boundary condition, the equation (1-8) is solved by using a separation variable method, and the change of the displacement of the sucker rod string at any depth along with the time can be obtained:
Figure GDA0002074366430000074
from hooke's law one can derive:
Figure GDA0002074366430000075
the variation of the dynamic load with time can be obtained according to the equation (1-12) as follows:
at time t, the total load F (x, t) on section x is the weight of the rod string below section x plus.
In the formulae (1-12) (1-13):
Figure GDA0002074366430000082
wherein alpha isn,βn,kn,μn,an,bn,cn,dnAre all special constants:
Figure GDA0002074366430000083
【2】 Through trial calculation, a method for iteratively calculating the damping coefficient by using a ground indicator diagram is selected.
The specific calculation formula of the damping coefficient is as follows:
Figure GDA0002074366430000084
in the formula (I), the compound is shown in the specification,
Figure GDA0002074366430000085
the stroke length of the polish rod can be obtained by dividing the integral of the areas of the upper stroke and the lower stroke of the polish rod indicator diagram by the stroke length of the polish rod;
Figure GDA0002074366430000086
the pumping unit is obtained by dividing the area integral of the up stroke and the down stroke of a pump diagram by the pump stroke respectively, wherein alpha is the structural coefficient of the pumping unit, and T is the period.
When the damping coefficient is solved by using the formula (1-16), the pump indicator diagram must be known first, but if the pump indicator diagram is known, the damping coefficient must be known first, so the damping coefficient is solved by adopting an iteration method after setting an initial value.
The convergence condition of the equations (1-16) is:
Figure GDA0002074366430000091
in which epsilon isTo allow for errors;
Figure GDA0002074366430000092
【3】 And solving a suspension point load value at the acceleration of zero.
(1) Solving the abscissa average value of any discrete point of the pump diagram by using a five-point averaging method;
Figure GDA0002074366430000093
(2) by shifting the maximum and minimum of the abscissa of the discrete points on the data: xmax,Xmin；
(3) Carrying out normalization processing on the displacement of the pump work diagram;
Figure GDA0002074366430000094
(4) calculating the curvature value k of each discrete point on the pump diagram according to the formula (1-20)i；
(5) Averaging curvature by five-point method
Figure GDA0002074366430000096
To improve the accuracy of the algorithm.
(6) Respectively obtaining k 'in the up-down stroke'iValue of i at 0, if k'i＞0,k′i+1< 0 or
k′i+1＞0,k′i＜0
Then
Figure GDA0002074366430000097
Solve to FdAnd Fu。
【4】 And solving the dynamic liquid level H of the oil well.
(1) Solving the liquid column load W on the full plunger area of the working fluid level depth in the oil wellL
WL＝Fu-Fd-(Pt-Pc)×Ap (1—21)
Wherein P istThe well head back pressure is Pa; pcIs sleeve pressure, Pa; a. thepIs the area of the plunger, m2；
(2) And solving the working fluid level H.
Figure GDA0002074366430000098
【5】 And eliminating accidental errors and optimizing a calculation result.
(1) Solving the average value of the calculated working fluid level H of the last five times
Figure GDA0002074366430000101
Figure GDA0002074366430000102
(2) And removing points with the relative error of the calculation result and the average value being more than 20%.
(3) And averaging the residual values to obtain the current working fluid level data H, wherein if the relative errors of all the data are more than 20%, the calculation is failed, the current production condition of the oil well is unstable, and the calculation is carried out after 5 complete strokes are waited.
Dynamic liquid level H for time point of failure of calculationiPerforming supplementary calculation according to the formulas (1-25),
Figure GDA0002074366430000104
【6】 Calibrating the working fluid level data of the oil well;
the calibration of the working fluid level calculation combines the actual measurement of the working fluid level data h of the oil welliAnd (6) calibrating.
Hbi＝μHi (1—26)
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. It should be understood by those skilled in the art that any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims (8)

1. A continuous measurement method for the working fluid level of an oil pumping well is characterized by comprising the following steps: which comprises the following steps:
(1) analyzing the dynamic characteristics of the sucker rod, establishing a vibration model of the sucker rod string, and establishing a one-dimensional second-order partial differential equation for describing the motion of the sucker rod string;
(2) iteratively calculating a damping coefficient by using a ground indicator diagram;
(3) obtaining the suspension point load value F at the zero position of the acceleration of the down stroke and the up strokedAnd Fu；
(4) According to FdAnd FuSolving the liquid column load on the full plunger area of the working fluid level depth in the oil well, and further solving the working fluid level H of the oil well;
(5) removing accidental errors and optimizing a calculation result;
(6) and calibrating the working fluid level data of the oil well.
2. The method of claim 1, wherein the method comprises the steps of: the one-dimensional second-order partial differential equation in the step (1) is a formula (1-3)
Figure FDA0002074366420000011
Wherein
Figure FDA0002074366420000012
For liquids in wellsDamping coefficient of sucker rod in s-1；
Figure FDA0002074366420000013
The propagation speed of the stress wave in the sucker rod is expressed in m/s.
3. The method of claim 2, wherein the method comprises the steps of: the sucker rod simulation vibration mathematical model in the step (1) comprises: wave equation, boundary conditions, initial conditions, and continuity conditions.
4. The method of claim 3, wherein the method comprises the steps of: the specific calculation formula of the damping coefficient in the step (2) is a formula (1-16):
Figure FDA0002074366420000014
wherein
Figure FDA0002074366420000015
The stroke length of the polish rod is divided by the area integral of the upper stroke and the lower stroke of the polish rod indicator diagram respectively;
Figure FDA0002074366420000021
the pumping unit is obtained by dividing the area integral of the upper stroke and the lower stroke of a pump diagram by the pump stroke, wherein alpha is the structural coefficient of the pumping unit, and T is the period;
the convergence condition of equations (1-16) is:
wherein ε is the allowable error;
Figure FDA0002074366420000023
5. the method of claim 4, wherein the method comprises the steps of: the step (3) comprises the following sub-steps:
(3.1) averaging the abscissa of any discrete point of the pump diagram by using a five-point averaging method
Figure FDA0002074366420000024
(3.2) by displacing the maximum and minimum values of the abscissa of the discrete point on the data:
Xmax,Xmin；
(3.3) carrying out normalization processing on the displacement of the pump work diagram;
Figure FDA0002074366420000025
(3.4) calculating the curvature value k of each discrete point on the pump diagram according to the formula (1-20)i
Figure FDA0002074366420000026
(3.5) averaging the curvatures by the five-point method
Figure FDA0002074366420000027
(3.6) k 'in the vertical stroke was obtained'iValue of i at 0, if k'i＞0,k′i+1< 0 or k'i+1＞0,k′i＜0
Then
Figure FDA0002074366420000028
Solve to FdAnd Fu。
6. The method of claim 5, wherein the method comprises the steps of: the step (4) comprises the following sub-steps:
(4.1) solving the liquid column load W on the full plunger area of the working fluid level depth in the oil wellL
WL＝Fu-Fd-(Pt-Pc)×Ap (1—21)
Wherein P istThe well head back pressure is Pa; pcIs sleeve pressure, Pa; a. thepIs the area of the plunger, m2；
(4.2) solving the working fluid level H
Figure FDA0002074366420000031
7. The method of claim 6, wherein the method comprises the steps of: the step (5) comprises the following sub-steps:
(5.1) solving the average value of the calculated working fluid level H of the last five times
Figure FDA0002074366420000033
(5.2) eliminating points with the relative error between the calculation result and the average value being more than 20 percent
Figure FDA0002074366420000034
(5.3) averaging the residual values to obtain the current working fluid level data H, if the relative errors of all the data are more than 20%, the calculation is failed, the current production condition of the oil well is unstable, and the calculation is carried out after 5 complete strokes are waited;
dynamic liquid level H for time point of failure of calculationiPerforming supplementary calculation according to the formulas (1-25),
Figure FDA0002074366420000035
8. the method of claim 7, wherein the method comprises the steps of: the calibration of the working fluid level calculation in the step (6) adopts the combination of actually measured oil well working fluid level data hiCarry out calibration
Hbi＝μHi (1—26)
Figure FDA0002074366420000036
CN201610941837.5A 2016-10-26 2016-10-26 Method and device for continuously measuring working fluid level of pumping well Active CN106351645B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610941837.5A CN106351645B (en) 2016-10-26 2016-10-26 Method and device for continuously measuring working fluid level of pumping well

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610941837.5A CN106351645B (en) 2016-10-26 2016-10-26 Method and device for continuously measuring working fluid level of pumping well

Publications (2)

Publication Number Publication Date
CN106351645A CN106351645A (en) 2017-01-25
CN106351645B true CN106351645B (en) 2020-01-03

Family

ID=57864960

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610941837.5A Active CN106351645B (en) 2016-10-26 2016-10-26 Method and device for continuously measuring working fluid level of pumping well

Country Status (1)

Country Link
CN (1) CN106351645B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106991231A (en) * 2017-03-30 2017-07-28 中国石油天然气股份有限公司 A kind of method and system for determining rod-pumped well pump work figure
CN108661623B (en) * 2018-05-03 2022-03-01 中国石油大学(华东) Pump diagram calculation method and device based on pumping unit suspension point load fluctuation analysis
CN108979623A (en) * 2018-06-20 2018-12-11 陕西安控科技有限公司 A kind of recognition methods of exception indicator card
CN112302629B (en) * 2019-08-02 2024-04-05 中国石油化工股份有限公司 Method and device for measuring working fluid level of oil pumping well
CN113445994B (en) * 2021-07-06 2022-06-07 燕山大学 Pumping well pump work diagram conversion method based on continuous system vibration mode superposition method
CN113865666A (en) * 2021-09-29 2021-12-31 东莞南玻太阳能玻璃有限公司 Liquid level measuring method, system, device and storage medium

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2479715C1 (en) * 2011-08-26 2013-04-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тюменский государственный нефтегазовый университет" (ТюмГНГУ) Monitoring method of dynamic fluid level in well for control of submersible electric pump
CN105089638A (en) * 2015-06-26 2015-11-25 中国石油化工股份有限公司胜利油田分公司 Method for online calculation of working fluid level of oil well by using pumping unit pump indicator diagram
CN105257279A (en) * 2015-10-26 2016-01-20 中国石油天然气股份有限公司 Method for measuring working fluid level of rod-pumped well

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2479715C1 (en) * 2011-08-26 2013-04-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тюменский государственный нефтегазовый университет" (ТюмГНГУ) Monitoring method of dynamic fluid level in well for control of submersible electric pump
CN105089638A (en) * 2015-06-26 2015-11-25 中国石油化工股份有限公司胜利油田分公司 Method for online calculation of working fluid level of oil well by using pumping unit pump indicator diagram
CN105257279A (en) * 2015-10-26 2016-01-20 中国石油天然气股份有限公司 Method for measuring working fluid level of rod-pumped well

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
利用示功图计算抽油机阻尼系数;余国安等;《石油钻采工艺》;19911031(第5期);第57-64页 *

Also Published As

Publication number Publication date
CN106351645A (en) 2017-01-25

Similar Documents

Publication Publication Date Title
CN106351645B (en) Method and device for continuously measuring working fluid level of pumping well
CN110206536B (en) Wellhead liquid production amount acquisition method based on pump indicator diagram
CN108798634B (en) Single-hole-single-layer mean value well testing interpretation method for fracture-cavity reservoir
CN106599449B (en) Well test interpretation method for karst cave volume calculation
CN104185735B (en) Fluid load line calculation, concavity test, and iterations on damping factor for downhole pump card
CN108805215B (en) Dynamic liquid level soft measurement method for sucker-rod pump pumping well based on improved drosophila algorithm
CN106089184B (en) method and device for diagnosing working condition of underground oil well pump
CN107608940B (en) Method for determining oil well interval pumping period
CN103867184A (en) Gas well critical liquid carrying flow rate determining method and device
CN105738252B (en) The measurement method of the flowable aperture boundary of viscous crude in a kind of crack
CN111502652B (en) Yield decreasing and production dynamic prediction method for three-hole medium gas reservoir horizontal well
CN110924904A (en) Method for adjusting rotating speed of motor of oil pumping unit by using bottom hole pump indicator diagram
US8322995B2 (en) Calculation of downhole pump fillage and control of pump based on said fillage
CN114427445A (en) Method and system for calculating infinite stratum dynamic capacity of fracture-cavity oil reservoir
CN108240215A (en) A kind of pumpingh well plunger effective stroke based on finite difference calculus determines method
CN109958431A (en) A method of oil well daily fluid production rate is calculated based on inflow performance relationship curve
CN1945276A (en) Method for detecting oil/water split-phase seepage flow resistance gradient
CN109812236B (en) Method for determining well cleaning effect in special-shaped well
CN105156080B (en) A kind of method and layering for preventing rod and tube partial-wear is same to adopt tubing string
CN109871562B (en) Method for calculating floating characteristic of airplane forced landing on water through hydrostatic surface based on Catia secondary development
CN108661623B (en) Pump diagram calculation method and device based on pumping unit suspension point load fluctuation analysis
CN111594106A (en) Method and device for automatically keeping pump body submergence of pumping unit and beam-pumping unit
RU2652772C1 (en) Method for determining the volume of behind-the-casing cavers
US10024314B2 (en) Control system and method of controlling a rod pumping unit
WO2024001071A1 (en) Indicator diagram-based method and apparatus for determining gas production amount of rod pump well

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20210319

Address after: 101-11, 4th floor, building 5, yard 9, Dijin Road, Haidian District, Beijing

Patentee after: Beijing ankong Automation Co.,Ltd.

Address before: 100095 building 6, yard 9, Dijin Road, Haidian District, Beijing

Patentee before: BEIJING ECHO TECHNOLOGIES Co.,Ltd.

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20220923

Address after: Room 101-10, 4th Floor, Building 5, Yard 9, Dijin Road, Haidian District, Beijing 100089

Patentee after: BEIJING ETROL OIL AND GAS TECHNOLOGY Co.,Ltd.

Address before: 101-11, 4th floor, building 5, yard 9, Dijin Road, Haidian District, Beijing

Patentee before: Beijing ankong Automation Co.,Ltd.

TR01 Transfer of patent right