Study on the Pressure Drop Variation and Prediction Model of Heavy Oil Gas-Liquid Two-Phase Flow

Table 1

Measurement ranges and system errors of each instrument.

Device	Measurement range	System error
Pressure sensor	0-3.5 MPa	±0.1%
Temperature sensor	0-90°C	±0.5%
Liquid mass flowmeter	0-20 m^3/h	±0.3%
Gas mass flowmeter	0-2000 m^3/h	±1%
Differential pressure sensor	0-0.25 MPa	±0.25%