Intelligent downhole flow calibration method of separate injection standard meter

A calibration method and standard table technology, which is applied in the directions of measurement, production fluid, earthwork drilling and production, etc., can solve the problem that the downhole flow rate cannot be calibrated, and achieve the effect of reducing operation risk and cost, improving accuracy and high accuracy

Inactive Publication Date: 2018-06-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that the downhole flow rate cannot be calibrated downhole, ensure the long-term accurate measurement of the downhole flow rate, and provide a method for calibrating the downhole flow rate of an intelligent dispensing standard meter

Method used

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  • Intelligent downhole flow calibration method of separate injection standard meter
  • Intelligent downhole flow calibration method of separate injection standard meter
  • Intelligent downhole flow calibration method of separate injection standard meter

Examples

Experimental program
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Effect test

Embodiment 1

[0025] This embodiment provides a figure 1 The shown intelligent dispensing standard meter downhole flow calibration method includes the following steps:

[0026] Step 1, repeatedly calibrate the downhole flowmeter, and record the flow y and pressure x of the downhole flowmeter;

[0027] Step 2, taking the flow y and pressure x of the downhole flowmeter as the points on the Y-axis and the X-axis respectively, and drawing a curve;

[0028] Step 3, get the corresponding equation according to the curve obtained in step 2: y=21.253x 2 +285.33x-117.81;

[0029] Step 4, use the equation obtained in step 3 as the flow equation, use the flow y and pressure x in the flow equation as the flow and pressure of the water outlet of the smart water distributor, and input the flow equation into the smart water distributor, then the The intelligent water distributor is lowered into the well, and the intelligent water distributor automatically selects the appropriate flow rate to inject wate...

Embodiment 2

[0033] This embodiment provides a method for calibrating the downhole flow rate of an intelligent dispensing standard meter, which also includes the correction of the flow rate. After the intelligent water distributor is lowered into the well, an ultrasonic flowmeter is lowered into the well to measure the ratio every six months to one year. Yes, to ensure the normal execution of downhole flow calibration.

[0034] Further, put an ultrasonic flowmeter into the well, test the flow y1 and pressure x1 of the outlet of the intelligent water distributor, record them, and use the flow y1 and pressure x1 as points on the Y-axis and X-axis respectively to draw a new curve, A new equation is obtained according to the new curve, and when the new equation is different from the equation in step 3, input the new equation into the intelligent water distributor to continue working with a new signal.

[0035] The downhole flow calibration method of the intelligent dispensing standard meter of...

Embodiment 3

[0038] This embodiment provides a method for calibrating the downhole flow rate of an intelligent dispensing standard meter. The intelligent water distributor is provided with at least a flow unit, a communication unit, and a measurement and adjustment unit inside, and a controller is provided on the ground. The flow unit and The measuring and adjusting units are all electrically connected to the communication unit, and the communication unit is electrically connected to the controller.

[0039] The flow unit is integrated with a flow equation, and the intelligent water distributor injects water downhole according to the flow rate set by the flow equation. The measurement and adjustment unit is used to monitor the water injection volume and pressure of the intelligent water distributor in real time, and Adjust the water injection volume of the intelligent water distributor.

[0040] The flow unit and the measurement and adjustment unit transmit information to the communication...

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Abstract

The invention provides an intelligent downhole flow calibration method of a separate injection standard meter. The intelligent downhole flow calibration method comprises the steps that calibration isconducted repeatedly through the downhole flow meter in sequence; a curve is made; a corresponding equation y=21.253x<2>+285.33x-117.81 is obtained according to the curve; the flow equation is input into intelligent water distributors, and the intelligent water distributors are put into a well for water injection work; and finally correction and calibration are conducted regularly. The intelligentdownhole flow calibration method is easy to operate and high in accuracy, the problem that the downhole flow cannot be calibrated under the well is solved, and it is guaranteed that the downhole flowis measured accurately for a long time; downhole flow calibration can be conducted without pipe column moving operation, thus the operation risk and cost are reduced, and flow calibration can be conducted in a layered mode; downhole self-calibration and correction are conducted according to the preset flow equation, and high-precision operation of downhole flow testing and adjusting is guaranteedfor a long time; and according to the method, the accuracy is further improved through the positive stroke and the reverse stroke.

Description

technical field [0001] The invention relates to the technical field of oil field water injection, in particular to an intelligent sub-injection downhole flow meter calibration method and an intelligent sub-injection standard meter downhole flow calibration method. Background technique [0002] At present, steel wire operation and cable operation are mainly used for test deployment of layered water injection wells in oilfields. The steel wire operation is controlled by the control platform of the ground well testing vehicle, and the steel wire is pulled up and down repeatedly to replace the fixed water nozzle. The cable operation is controlled by the ground well test vehicle control platform. Realize the function of adjusting while measuring. [0003] The most commonly used oil well downhole flow measurement device in the oil field is the turbine flowmeter, which uses the downhole fluid to drive the turbine to rotate and calculate the flow value from the speed value. The ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20E21B47/00
CPCE21B43/20E21B47/00
Inventor 胡改星巨亚锋姚斌于九政毕福伟杨玲智王子建刘延青
Owner PETROCHINA CO LTD
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