Multi-Phase Flow Metering Using Dissimilar Flow Sensors: Theory and Field Trial Results

Abstract This paper addresses a new approach to multi-phase flow metering. The Multi-Phase Flow Meter (MPFM) described combines dissimilar flow sensors to measure the flow rates of the gas and liquid components plus a microwave water content monitor to determine the oil and water fractions. A brief review of the alternate technologies and approaches to multiphase metering is included as a basis for explanation of the design choices in this meter. The predicted performance of the meter is compared against field tests that were conducted to assess the performance of the meter. These tests covered a wide range of fluid properties, gas void fractions up to 97%, 0–100% water cut, and various installation geometries. The field tests support the predicted overall accuracy of ±10% of the reading ( ± 2% of the full scale) for liquids and ± 10% of the reading (± 5% of the full scale) for the gas components of the flow.