Underwater multiphase flowmeter based on Ba133

Abstract

The invention discloses an underwater multiphase flowmeter based on Ba133 and used for oil well metering of an underwater process system. The underwater multiphase flowmeter comprises a flowmeter body, a Venturi tube module, a radioactive source module, a detector module, an electronic bin module, a temperature and pressure sensing module and a differential pressure sensing module, the Venturi tube module is sealed inside a channel of the flowmeter body, the radioactive source module, the detector module, the temperature and pressure sensing module and the differential pressure sensing module are waterproof and connected to the flowmeter body in a sealed mode, the electronic bin module is waterproof and connected to the detector module in a sealed mode. The underwater multiphase flowmeter is suitable for measuring multiphase flow directly underwater, can be placed the underwater environments of ocean wells and the like, and is suitable for on-line flow real-time monitoring of underwater single-well or multi-well oil and gas production systems.

Description

technical field [0001] The invention relates to the technical field of underwater production system measurement, in particular to a multiphase flowmeter. Background technique [0002] Surface multiphase flowmeter is a relatively conventional flowmeter for online real-time measurement of multiphase flow. In the prior art, surface flow meters mainly rely on Venturi, cross-correlation and other technologies to measure the total flow of mixed fluids, and use gamma sensors, ultrasonic sensors, capacitance-conductivity water-cut meters, microwave water-cut meters, differential pressure density meters, etc. to measure the phase of fluids. Fraction, and then obtain the flow rate of each single phase in the mixed fluid. The multiphase flowmeter can perform online real-time measurement without separating oil and gas well products, and the obtained data are continuous oil and gas well production data, which can be used as the basis for reservoir management and production optimization....

AI Technical Summary

Problems solved by technology

For the underwater production system, there are more or less measurement errors in the basic instruments, which are continuously transmitted and amplified in the subsequent simulation calculations, eventually leading to large errors

On the other hand, multiphase flow is a very complex flow phenomenon, and the theoretical research on multiphase flow has not yet achieved substantial breakthroughs. At present, there is still no reliable theoretical model that can describe the flow phenomenon of multiphase flow

As a result, model errors are introduced, which greatly reduces the measurement reliability of the virtual flowmeter.

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