Multi-Phase Flowmeter for Gas Testing After Fracturing

Multi-phase metering and testing of produced fluids from oil and gas wells is an indispensable daily task in oil fields. Efficient and accurate online metering of multiphase flow is a major proposition for lean management, digital transformation, and quality and efficiency improvement in oil fields. Multi-phase flow has complex components, changeable flow patterns, and a harsh on-site testing environment. The development of efficient, high-precision, widely applicable, and low-cost multi-phase metering methods and devices is a key technology to solve the above propositions, and it is also a global technical challenge. At present, metering in the metering room by tipping buckets and manual sampling and testing still dominate, with low precision and low efficiency, which seriously restricts the intelligent development of oil fields. In recent years, online metering and analysis technologies such as infrared, microwave, and radiation have developed, but their scope of application is narrow, their prices are high, and they have potential safety hazards, and they do not meet the conditions for large-scale promotion. Magnetic resonance is a common laboratory detection technology for complex fluids and porous media. As a green, efficient and accurate means of quantitative oil and gas detection, it has been applied in the field of oil well logging. At present, the research on magnetic resonance technology in multiphase flow measurement and analysis has just started in the world, but it is widely recognized by the scientific and industrial communities as a technology with the most development potential for online oil and gas measurement and analysis. The breakthrough and application of online detection devices for oil and gas multiphase flow magnetic resonance can solve the problems existing in the existing separation and measurement technologies in an integrated manner. With the depletion of oil and gas resources in old areas, reservoir transformation technologies represented by acid fracturing have become the main means for oil companies to increase production. The production data during the oil and gas testing stage is an important parameter for evaluating the fracturing effect. However, during the oil and gas testing stage, the flow rate of the produced fluid fluctuates greatly (e.g. the water content changes from 0 to 100%, and the gas-liquid ratio fluctuates from 0 to several thousand), which puts high demands on the range, frequency, and accuracy of the measuring instruments.