Application of Multiphase Flow Meter in Tarim Oilfield

Abstract: The application information of multiphase flow meter in Tarim Oilfield is provided by excellent flow meter and flow meter manufacturers. The reason why multiphase metering technology and application has become a hot topic pursued by oil countries in the world in recent years is that it has changed the traditional separator metering mode of oil wells, which can simplify the surface production process of oilfields, greatly reduce the cost of production capacity construction, and facilitate operation and management. improve. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the application article details of multiphase flowmeters in Tarim Oilfield. The reason why multiphase metering technology and application has become a hot topic pursued by oil countries in the world in recent years is that it has changed the traditional separator metering mode of oil wells, which can simplify the surface production process of oilfields, greatly reduce the cost of production capacity construction, and facilitate operation and management. Increase the level of automation, etc. The development and testing process of multiphase flowmeters in Tarim started from the end of 1992. Before 1995, we realized multiphase metering by measuring the total flow and phase fraction.γRay, vortex flowmeter /γray, correlation method/γ3 stages such as rays. From the end of 1995, we began to focus on the realization of multiphase metering by measuring the phase fraction and flow rate of each phase. After several years of field tests, it is basically recognized that the use ofγThe ray correlation method was used to measure the flow velocity of each phase andγMeasurement principle and method of phase fraction measurement by ray absorption method. The flowmeter has now been basically finalized and formed a series of products. In order to improve the measurement accuracy, measurement range, reliability and stability of multiphase flowmeters, some improvements have been made in hardware and software recently. Measurement principle and composition of MFM multiphase flowmeter———γAbsorptiometry 2 Velocity Measurement———Cross-correlation method The cross-correlation flow rate measurement is based on a measure of statistical similarity between two random signals. When the fluid flows through the pipeline, the upstream and downstream sensors installed at a certain distance (L) in the axial direction of the pipeline pick up two random signals from the flowing non-uniform fluid at their respective measurement points, and detect the difference between them. Cross-correlation time ti, the velocity vi of fluid flow can be obtained. Discussions and proofs of relevant values ​​can be found in mathematical works. 3. Structure and composition of metering system A complete set of MFM multiphase metering device should generally include 4 major parts: phase fraction measurement device; flow rate measurement device; temperature and pressure measurement device; data acquisition and processing system. Application situation and field data Since the end of 1992, we have cooperated with researchers from Lanzhou Haimo Company to conduct field tests and use in Lunnan, Yaha, Tazhong fourth oilfields in Tarim, and shared 20 sets of front Four generations of prototypes or products have carried out hundreds of three-phase non-separation measurements on nearly a hundred oil wells. There are still 13 sets in use now, and in 1997, 3 sets of three-phase flowmeters and supporting systems of different specifications were creatively integrated into a skid, and a mobile three-phase non-separation metering suitable for desert environment was successfully developed. The device has achieved good economic benefits. Compared with separate metering, the non-separated metering system has the following advantages: ① It can realize continuous and online automatic metering, avoiding the errors caused by the representative problems of metering and sampling time; ② It is convenient to operate and manage, and can realize unmanned measurement during measurement. On duty, low operation and maintenance costs; ③ no resistance and moving parts, safe and reliable; ④ three-phase measurement results, automatic printing of measurement reports; ⑤ easy installation, reduce land occupation, save construction investment, etc. Before the country and the industry have promulgated relevant regulations on multiphase flowmeters, the common practice in oilfields at home and abroad is to compare multiphase metering with traditional separation metering to obtain the relative accuracy and reliability of multiphase metering. Without exception, our Tarim Oilfield has also done a lot of tests and researches in this area. We have conducted field comparison tests in desert oil fields and offshore platforms, and conducted tests on two multiphase flow comparison devices at home and abroad. . 1 Field measurement data From December 1997 to June 2000, in the hundreds of times of measurement of 45 single wells in Lunnan Oilfield, the original measurement separator in the measurement room was compared with the multiphase flowmeter. There are metering under changing the output of the same well by changing the nozzle, and there are metering comparisons of oil and gas production and water cut in different well conditions. The data statistics of the measurement results within the design measurement range of the flowmeter show that the accuracy of the liquid volume is±10% (relative error), air volume accuracy±15% (relative error), moisture content accuracy is±Data within 3% (absolute error) accounts for 80%.

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