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Method for calculating working fluid level based on energy of oil well indicator diagram

A technology for energy calculation and dynamometer diagram, which is applied in complex mathematical operations, design optimization/simulation, special data processing applications, etc.

Pending Publication Date: 2021-02-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For a long time, the dynamic fluid level in the annulus of pumping wells has been tested with an echometer. The test method is manual and regular operation. The equipment used is dangerous and cumbersome, and it is difficult to test continuously for a long time
Due to the influence of factors such as the dead oil ring in the annulus of the oil well casing and the doglegs in the downhole, the dynamic liquid level testing instrument currently used causes the test analysis results to be inconsistent with the actual liquid level. At present, other measurement methods (such as electric air guns) are also used. , electric nitrogen cylinders), but due to the complex process structure, high cost and short service life, it is difficult to promote

Method used

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  • Method for calculating working fluid level based on energy of oil well indicator diagram
  • Method for calculating working fluid level based on energy of oil well indicator diagram
  • Method for calculating working fluid level based on energy of oil well indicator diagram

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] A method for calculating dynamic liquid level based on energy of oil well dynamometer diagram, comprising the following steps,

[0122] Step 1: Obtain data through the rod pumping dynamometer system of the oil well, and obtain the dynamometer diagram of the oil well;

[0123] Step 2: Establish a mathematical model, and calculate the oil well pump dynamism diagram through the established mathematical model and the parameters in the oil well indicator diagram obtained in step 1;

[0124] Step 3: Use the parameter data in the oil well pump diagram obtained in Step 2 to obtain the effective stroke of the pump;

[0125] Step 4: Calculate the area of ​​the pump power diagram;

[0126] Step 5: Through the area of ​​the pump power diagram calculated in step 4, calculate the parameter value of the dynamic liquid level of the oil well;

[0127] Step 6: Use the obtained oil well dynamic liquid level parameter values ​​for the guidance of oilfield production.

[0128] In actual ...

Embodiment 2

[0131] refer to figure 1 , Figure 4-Figure 7 Shown is a method for calculating the dynamic liquid level based on the energy of the oil well indicator diagram. On the basis of the first embodiment, the method of establishing a mathematical model in the first step and calculating the oil well pump diagram through the established mathematical model is as follows :

[0132] Step 1: Establish a simplified model for fault diagnosis of rod pump oil recovery system;

[0133] Assume that the displacement s of the sucker rod string is positive downward and negative upward; the axial force F of the sucker rod string is positive when pulling, and negative when compressing; the whole sucker rod string is divided into M units, and each unit is The following equivalent treatment: remove the bending stiffness of the unit, concentrate the mass of the unit on the node at one end of the unit, and form multiple concentrated masses m i , the tension and compression stiffness between each lumpe...

Embodiment 3

[0224] refer to figure 2 and image 3 Shown is a method for calculating the dynamic liquid level based on the energy of the oil well indicator diagram, the oil well rod pumping diagram system in the first step includes a data collection point 4, a data processing point 5 and a server 6; the data The collection point 4 is connected to the data processing point 5 by electric signals; the data processing point 5 is connected to the server 6 by electric signals.

[0225]Further, the data collection point 4 includes a pumping unit 7, an electrical parameter sensor 1, a displacement sensor 2, a load sensor 4, an RTU, and a motor monitoring device; On the box, the displacement sensor 2 is arranged above the central axis of the beam of the pumping unit 7; the load sensor 4 is arranged on the rope hanger and the polished rod clamp of the pumping unit 7; the electric parameter sensor 1 , the displacement sensor 2 and the load sensor 4 are respectively connected with the RTU electrica...

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Abstract

The invention belongs to the technical field of oil field digitization and oil extraction processes, and particularly relates to a method for calculating a working fluid level based on energy of an oil well indicator diagram. The method comprises the following six steps of acquiring data through an oil well rod oil pumping indicator diagram system to obtain the oil well indicator diagram, calculating to obtain an oil well pump indicator diagram, calculating the effective stroke of a pump, calculating the area of the pump indicator diagram, calculating to obtain an oil well working fluid levelparameter value, and applying the obtained oil well working fluid level parameter value to guidance of oil field production. The working fluid level parameter value is obtained on the basis of an oilwell indicator diagram, and the purposes of production guidance, cost reduction and benefit increase are achieved.

Description

technical field [0001] The invention belongs to the technical field of oil field digitization and oil recovery technology, and in particular relates to a rod pumping indicator diagram acquisition system and a method for calculating a dynamic liquid level. Background technique [0002] The ultimate goal of oilfield development is to pursue the maximization of production and comprehensive efficiency, and the liquid supply capacity of the formation will be the fundamental factor restricting the realization of this goal. Therefore, understanding and scientifically utilizing the liquid supply capacity of the formation has become an oilfield development management activity unavoidable issues. The dynamic liquid level of an oil well is an important index reflecting the liquid supply capacity of the formation, and an important basis for the design of mechanical production wells. Therefore, it will be very important and meaningful to obtain the dynamic fluid level in time and accura...

Claims

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Application Information

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IPC IPC(8): E21B47/047G06F30/20G06F17/16G06F17/10
CPCG06F30/20G06F17/16G06F17/10
Inventor 李明江冯守松刘天宇陆梅樊晨艾信于洋闫娟吴利利魏小林张彬
Owner PETROCHINA CO LTD