Multiphase flow metering system and method

A multiphase flow metering system, wherein the multiphase flow metering system comprises:

• a magnetic resonance multiphase flowmeter and a manifold system, which is correspondingly configured;
• the manifold system comprises a plurality of control valves and a connection pipeline and is configured to control a corresponding fluid to flow through the magnetic resonance multiphase flowmeter;
• the manifold system comprises:
• a measurement trunk and a measurement branch;
• the measurement trunk is formed by connecting the following components in sequence:
• a first three-way valve (2), a two-way valve (3), a second three-way valve (4) and a third three-way valve (5);
• and
• the magnetic resonance multiphase flowmeter (1) is disposed between the two-way valve (3) and the second three-way valve (4);
• the measurement branch comprises:
• a fourth three-way valve (6) and a pressure-limiting safety valve (7);
• and
• the measurement branch is connected in parallel on the measurement trunk through a third port of the first three-way valve (2), a third port of the second three-way valve (4) and a third port of the third three-way valve (5);
• the magnetic resonance multiphase flowmeter comprises a plurality of magnet structures, which are distributed at intervals in an axial direction of the magnetic resonance multiphase flowmeter and are configured to magnetize a fluid;
• and
• the magnetic resonance multiphase flowmeter further comprises two measurement antennas, which are distributed at intervals in the axial direction of the magnetic resonance multiphase flowmeter and are configured to perform phase state detection on the magnetized fluid.