Electromagnetic flow meter scale application in production logging

Abstract: the application of electromagnetic flow meter scale in production logging information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. 1 the working principle of electromagnetic flowmeter electromagnetic flowmeter based on Faraday electromagnetic induction principle work [ 1] Figure 1, as the basic working principle of the electromagnetic flowmeter. When the conductive fluid flow through the measuring tube with velocity v cutting magnetic flux density of B lines of motion, as shown in figure. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the electromagnetic flowmeter scale applications in production logging article details. 1 the working principle of electromagnetic flowmeter electromagnetic flowmeter based on Faraday electromagnetic induction principle work [ 1] Figure 1, as the basic working principle of the electromagnetic flowmeter. When the conductive fluid flow through the measuring tube with velocity v cutting magnetic flux density of B lines of motion, as shown in figure 1, is in a pair of detecting electrodes between the induction electromotive force generated by the voltage U under the available type E said: U = K· B· D· v ( 1) Type, U for two detection signal voltage between electrodes, V. For the magnetic flux density B, T; D to measure the tube diameter, m; V as the average flow velocity, m/s; K for the proportionality constant. By measuring the instantaneous volume flow rate Q (of the catheter m3 / h) To: Q = ( π · D） / ( 4· K· B） · U ( 2) Due to the measuring tube diameter is fixed, at constant excitation current, magnetic flux density B is constant, a linear relationship with U and Q, so the volume flow rate is proportional to signal voltage between electrodes, measure the value and volume flow rate Q after transformation circuit can be obtained. 2 the characteristics of the electromagnetic flowmeter electromagnetic flowmeter is a high precision downhole flow measurement instruments, measuring instruments by internal magnetic or external magnetic probe the pipe flow of conducting liquid flow rate to calculate, it has no mechanical moving parts, also do not have the throttling parts, so there is little pressure loss in the measurement, has simple operation, good reliability and high accuracy of measurement, Measuring accuracy can reach 0. 5% relative error of measurement, specially check or special manufacture of precision can be higher) , low zero drift, wide range, small startup displacement and BuKa sand etc. , the measured results are not affected by the temperature of the fluid, viscosity, density, pressure and composition of liquid-solid ratio, the conductivity in a wide range change will not affect the measurement result. 3 electromagnetic flowmeter logging data interpretation method in view of the above characteristics of electromagnetic flowmeter is widely used in oil field oil and water Wells of conductive liquid injection profile measuring leakage or well examination, such as injection profile and water, to find leakage and a series of logging project measurement [ 2] 。 Electromagnetic flowmeter is a kind of directly measuring instrument of fluid flow, thus the measured flow can be read directly. With turbine flowmeter for flow, you need to go through a large number of linear regression and formula calculation, calculation and cumbersome precision is not high, bring greater difficulty data interpretation work. Through the formula to calculate the poor: & Delta; f=fi- Xsl-fo type, & Delta; F the poor; Fi for measuring frequency values; Xsl-fo to zero frequency. Then each side is obtained by look-up table words ground flow values can be obtained: Q = & Delta; F/k type, Q for ground flow value; Δ F the poor; K on the word count for each party. Thus, fluid flow, was calculated by the electromagnetic flowmeter method is simple, high precision. For electromagnetic flowmeter is total cross-section sampling measurement, namely each fluid particle through field work, and cut the lines of magnetic force produced by induction electromotive force, not only to measure the velocity of the section, local so logging data can be greatly improved, for oil field dynamic monitoring of oil and water Wells to provide reliable basis. Logging data processing and interpretation of the development of computer software, read the value of high precision, easy operation and reliable calculation accuracy, explain the conclusion. Four electromagnetic flowmeter in production logging application example 4. 1 the application of electromagnetic flow meter in water injection profile logging series, consisting of a water injection profile logging is not affected by the influence of isotope contamination and isotope distribution does not reach the designated position, can be blocked layer of water quantity calculation, can be quantitatively identify & other; Big hole formation & throughout; And the thief zone, thus greatly improving the injectivity profile logging data interpretation precision [ 3] 。 For example, figure 2 is the article 33 - XX figure five parameter water injection profile logging, well logging in the 2690 m blocked, 10, 11, 12 layer did not measure, but by the electromagnetic flowmeter logging curve, according to the 3 blocked each layer suction, absolute water quantity for 74. 6 m3 / d, relative water quantity for 41. 2%. 4. 2 in the application of engineering to obtain and find leakage logging engineering composed of electromagnetic flowmeter for water logging series, small startup displacement, not out of the sand in the hole deviation, well well conditions factors, such as main and second out of the water layer, to find out all the quantitative interpretation precision and logging data. By engineering to find leakage of electromagnetic flowmeter logging series, logging data quantitative calculation accuracy is high, especially in oil well engineering for leakage logging application effect is remarkable, is not affected by injection water quality, a logging can find one or more funnelled, find funnelled position is accurate and reliable. 5 conclusion electromagnetic flow downhole tool not only to eliminate the deviation, in the actual logging well dirty, formation pollution factors, at the same time solve the small-engine quantitative interpretation of water absorption and water leakage problem, also make the blocked layer and surface layer under the water absorption and water pours the quantitative interpretation of problems solved, instrument measuring accuracy is high, the data interpretation method is simple, has a good practicability. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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