Application of intelligent flow meter in high pressure condensate oil (gas) well

Abstract: The application information of intelligent flow meter in high pressure condensate oil (gas) well is provided by excellent flow meter and flow meter manufacturers. With the development and construction of Tahe Oilfield, the oilfield has gradually shifted from the extension development to the connotation tapping potential, and increases the competitiveness by saving energy, reducing consumption and improving efficiency. To this end, Tahe Oilfield Evaluation Area 2 has carried out energy-saving technological transformation of crude oil pipeline network in T759, T759-1, KZ3, etc. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the application article details of intelligent flowmeters in high-pressure condensate oil (gas) wells. With the development and construction of Tahe Oilfield, the oilfield has gradually shifted from the extension development to the connotation tapping potential, and increases the competitiveness by saving energy, reducing consumption and improving efficiency. To this end, Tahe Oilfield has carried out energy-saving technology transformation of crude oil pipeline network in Evaluation Area 2, and constructed a high-pressure condensate (gas) near four high-pressure condensate (gas) wells T759, T759-1, KZ3 and S108-1 as a pilot project. The well valve group metering station centrally measures and transports the high-pressure condensate oil (gas) of the four wells. The accuracy of the high-pressure natural gas measurement is very important for the energy saving and consumption reduction work of this valve group station. 1 Structure of the precession vortex flowmeter 1.1 Structural characteristics For the measurement of gas, since its density is greatly affected by temperature and pressure, in order to accurately measure the volume flow of the gas medium, the temperature and pressure of the detection medium must be tracked at the same time, and the The gas flow under different working conditions is converted into the volume flow under the standard state (P=101.325KPA, T=293.15K). With the development of science and technology, the precession vortex flowmeter has been developed from the non-intelligent type to the intelligent type, the function has been further improved, and the stability has been further strengthened. The following is a brief introduction to the structural characteristics of the CUYD series intelligent precession vortex gas flowmeter. 1.2 The structure of the flowmeter The CUYD type precession vortex flowmeter is mainly composed of the following four components (see Figure 2-2): ① The precession vortex flow sensor D, which is also composed of a vortex generator D1, a shell D2, and a vortex detection group D3. It is composed of the de-rotating rectifier D4; ② the flow totalizer B is composed of the shell B1, the temperature interface B2, the pressure interface B3, the display window B4, and the output interface B5; ③ the temperature sensor component C; ④ the pressure sensor component A. 1.3 Main features It integrates temperature, pressure, flow sensors and intelligent flow totalizers. It can detect the temperature, pressure and flow of the working medium, and perform automatic compensation and automatic correction of the compression factor. It can directly detect the standard volume flow or saturation of the gas. Mass flow of steam; no mechanical moving parts, not easy to corrode, good reliability and stability, no maintenance for long-term work. Parameters such as temperature, pressure and flow can be displayed on the LCD screen, and 4—20mA standard analog signal output and automation system interface; the machine can work with built-in battery, and can be powered by external power supply; with explosion-proof function, it can be used in places with explosive danger. 2 The working principle of the precession vortex flowmeter 2.1 The working principle of the flow sensor The precession vortex flowmeter belongs to the speed measuring instrument. It measures the volume flow of a fluid by measuring a frequency signal proportional to the flow. The fluid entering the flowmeter generates a vortex flow through the vortex generator, and the vortex flow precesses in the Venturi tube, and the vortex flow is accelerated by a sudden throttling when it reaches the constriction section. 2.2 The working principle of flow totalizer The CUYD flowmeter is mainly used for gas measurement. The microprocessor in the totalizer performs temperature and pressure compensation according to the gas state equation. The gas state equation is as follows: Vn=Zn/Zg×(Pg+Pa)/Pn×Tn/Tg×Vg where: Vn—Volume in standard state, Nm3; Vg—Uncorrected volume, Nm3; Zn—Compression factor in standard state; Zg—Compression factor in working condition; Pn—Standard atmospheric pressure, 101.325KPA; Pg—Gauge pressure at the pressure detection point of the flowmeter, KPA; Pa—Local atmospheric pressure, KPA; Tn—Absolute temperature in standard state, 293.15K; Tg—Absolute temperature of the measured medium, (273.15+t)K; t—Celsius temperature of the measured medium, ℃. According to the above principle formula, it is known that when the parameters of Vg, Zn, Zg, Pn, Pg, Pa, Tn and Tg are constant, Vn (the volume in the standard state) will change with t (the temperature in Celsius of the measured medium) It varies from high to low [1][2]. 3. Error loss of gas measurement Taking the three high-pressure condensate (gas) wells of T759, T759-1, and KZ3 entering the T759 valve group station as an example, the orifice flowmeter with flange pressure is used to calculate the daily gas production as shown in Figure 3. Taking Well T759 as an example, it is calculated that the temperature change of the vortex flowmeter affects the gas measurement error. Compared with the daily production data (12.6km3/d) measured by the orifice flowmeter using flange pressure, the measurement error is controlled within the unit requirements.±within 3%. According to the formula as follows: Vn=Zn/Zg×(Pg+Pa)/Pn×Tn/Tg×Vg, setting: When the parameters of Vg, Zn, Zg, Pn, Pg, Pa, Tn, and Tg are constant, the data of Vn (volume in standard state, Nm3) at different temperatures of the measured medium are shown in the figure. 4. Table 1 and Table 2. Table 1. Variation of parameters of a single well in T759 valve group station. Table 2. Variation of parameters of T759 well at different temperatures. After 4°C, it is easy to produce water compounds, which will cause the pipeline to freeze and block, which will affect the accuracy of the measurement data; (2) After the temperature of the measured medium is higher than 30°C, it is easy to condense when it gradually approaches the boiling point of the condensate oil. Oil and gasification, and affect normal safe production; (3) When the temperature of the measured medium is greater than 15°C and less than 27°C, it meets the requirements of production; (4) High-pressure condensate (gas) wells in Tahe Oilfield are transported During the process, the temperature of the conveying medium will affect the measurement error. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Application of intelligent flow meter in high pressure condensate oil (gas) well'

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