Sensor for Conductivity Measurement of Aqueous Phase Multiphase Flow in Vertical Riser

Abstract

The invention relates to a sensor for measuring the conductivity of the water-phase multi-phase flow containing water in a vertical riser, which comprises an insulating flow guide, a measuring electrode and an upper end flow guide located above the insulation flow guide, wherein the upper end flow guide The size of the bottom facing surface is larger than the size of the backwater surface of the top of the insulating flow guide, and its horizontal projection covers the horizontal projection of the top backwater surface of the insulating flow guide; The cavity formed between the water surfaces is called the full water acquisition area, and the height of the full water acquisition area should ensure that the newly inflowing fluid from bottom to top can be separated and exchanged with the retained fluid. The main body of the upper guide is columnar, and the bottom of which is provided with an annular groove; the measuring electrode is fixed on the top of the insulating guide.

Description

technical field [0001] The invention relates to a sensor for measuring the electrical conductivity of water-containing multiphase flow, which can be used for electrical measurement of oil-water / gas-water / oil-gas-water / multiphase flow split-phase volume concentration in production wells of water injection development oilfields. Background technique [0002] Along with different production methods in the process of oilfield water injection development, oil-water / gas-water / oil-gas-water / multiphase flow often occurs in oil wells to produce mixed fluid. In order to understand the dynamic characteristics of oil well production and optimize reservoir management, real-time dynamic monitoring of oil well water holdup parameters is required. At present, the conductivity method or capacitance method is a conventional measurement method for obtaining water holdup. Due to the differences in the geological structure of oil and gas fields in different regions and the changes in the propert...

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Problems solved by technology

[0003] Microwave technology (United States Patent, Patent No.: US6831470B2, Date of Patent: Dec.14, 2004) and dual-mode gamma ray method (Salinity independent measurement of gas volumefraction in oil / gas / water pipe flows, Applied Radiation and Isotopes, 2000,53:595-601) have been used to monitor the conductivity of the water phase in multiphase flow, but the structure of these sensors and their measurement systems are relatively complex, the cost of the device is high, and the measurement method is difficult to implement

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