Research on the Application of Precession Vortex Flow Meter in Oil Field

Abstract: The application research information of precession vortex flowmeter in oil field is provided by excellent flowmeter and flowmeter manufacturers. The precession vortex flowmeter is a turbine flowmeter with retractable metal blades. It has the characteristics of large impeller area and durability. The instrument itself has a centralizing mechanism and has good centering. During the process of going down the well, the blade automatically shrinks and enters when it passes through the tubing. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the details of the research articles on the application of precession vortex flowmeters in oil fields. The precession vortex flowmeter is a turbine flowmeter with retractable metal blades. It has the characteristics of large impeller area and durability. The instrument itself has a centralizing mechanism and has good centering. When the instrument goes down the well, when it passes through the tubing, the blade automatically shrinks, and then automatically opens after entering the casing, which does not affect the instrument's tripping. The difficulty of flow test in heavy oil wells. Introduction The oilfield is mainly located in the Aikekule Ordovician structure in the southwest of the Akekule uplift in the Shaya uplift in the Tarim Basin, Xinjiang. Rock and micrite limestone, secondarily breccia and sandy mudstone formed by karstification, mostly gray. The Ordovician limestone matrix is ​​dense in lithology, and the storage and seepage space has various shapes, sizes, and uneven distribution, which constitute the unique characteristics of oil wells in the oil field: ultra-viscous, high-viscosity, and high-yield. These characteristics bring great difficulties to the acquisition of flow logging data. The traditional turbine flowmeter has a good effect on the logging of low-yield wells and thin oil wells. Because the flow totalizer itself has the shortcomings of small turbine blade clearance, narrow blade area, and the sensor is greatly affected by the medium, for ultra-thick, high-viscosity, High-production wells are powerless. The newly developed precession vortex flowmeter is not affected by fluid viscosity and flow rate, which solves the problem of difficult flow logging in oilfields [1]. 1 Instrument principle and technical characteristics 1.1 Working principle Precession vortex flowmeter is a gas flowmeter using retractable metal vane type. When the instrument passes through the oil pipe, the bracket automatically shrinks, driving the connecting rod and the sliding sleeve to close the impeller; after entering the casing, the bracket automatically opens, the connecting rod and the sliding sleeve also automatically retract, and the spring drives the impeller to retract and automatically open. During measurement, the fluid drives the impeller and the mandrel to rotate together, and the magnetic core at the other end of the mandrel also rotates together; the five magnetic sensors arranged around the magnetic core receive the magnetic induction signal, thereby calculating the rotational speed of the impeller, The flow rate of the fluid is calculated from the calibration data. The block diagram of the working principle is shown in Figure 1. Figure 1. The principle block diagram of the instrument 1.2 Instrument features The precession vortex flowmeter has the characteristics of large impeller area and strong durability. The instrument itself has a centralizing mechanism, which has good centering. When the instrument goes down the well, when it passes through the tubing, the blade automatically shrinks and automatically opens after entering the casing, which does not affect the up and down of the instrument. It also adopts a ball bearing structure design, with low resistance, flexible rotation and high measurement accuracy; the magnetic steel is in a semi-sealed state, which can prevent the adsorption of iron filings and has stronger adaptability [2]. 1.3 Technical indicators Outer diameter:Φ38mm Working pressure: 100MPa Working temperature: 175°C Working voltage: 34VDC Output signal: 10 pulses/circle Start displacement: 25m3/d Maximum flow: 1000m3/d2 Field application effect analysis Precession vortex flowmeter with magnetic positioning, gamma, temperature, pressure, water content, fluid density, etc. The construction process of logging instrument for production profile logging is as follows: According to the characteristics of the oil field, the speed of 10m/min, 15m/min, 20m/min, 25mm/min is used to measure up and down, and a total of 8 flow rates of different speeds are measured. Curve, combined with temperature, pressure, water content, fluid density curve for analysis and calculation, so as to obtain the liquid production volume and liquid production properties of each layer. After more than a year of field practice, it has been proved that the instrument has solved the problem of difficult logging of super heavy oil wells and high-yield wells, and improved the accuracy of flow test data. 2.1 Overcome the difficulty of flow testing of super-heavy oil wells. The oil field has a burial depth of more than 6000m, the highest crude oil density is 1.04g/cc, and the highest kinematic viscosity is 37814mPa.s (50 mPa.s).°C), the conventional turbine flowmeter blades are seriously stuck, and qualified turbine flow data cannot be obtained. Only the tracer flowmeter method is used to record the production data, which greatly reduces the flow test accuracy. , which has well overcome the difficulty of flow test in super heavy oil wells. Well TK1237 is a development well in the north-east-trending slope of the Akekule salient in the Aiding fracture-cavity development zone. The density of the oil-water mixture is 0.9491g/cc, which belongs to the heavy oil well. By using the intelligent precession vortex flowmeter Tested, the instrument works fine, the turbo curve reaches“Trinity”According to the test data processing, it is concluded that the main water-producing layer is below 6614.0 m, and the interpretation results of the layered test of Well TK1237 are shown in Table 1. 2.2 Filling the blank of the flow test of high-production gas wells With the development of gas fields in the Tarim Basin increasing The production of gas wells in many gas fields is quite high, exceeding the upper limit of the conventional continuous turbine flowmeter, and it is impossible to measure the gas production of a single layer. Well YT1-8 is a gas well on the Yangtake fault zone on the northwestern margin of the Luntai uplift in the western part of the Tabei uplift in the Tarim Basin

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