The accurate measurement of two-phase flow parameters has always been a key issue for many industries. Advancements in flow measurement techniques led to the development of multiphase flow meters which can measure it without separating it to individual phases. This technique is based on the homogeneous flow model which treats the two-phase flow as a single-phase flow at the homogenized location. It has been experimentally proven that a slotted orifice plate is a better flow homogenizer than a standard orifice plate and a V-cone. However, the location downstream of the slotted orifice plate where the two-phase flow becomes most homogeneous is still not known. Knowing this would help in accurate flow metering of the two-phase flow as the sensors (such as the electrical impedance sensor) can be placed at the most homogenized location. Electrical Resistance Tomography (ERT) is a non-invasive measurement technique that determines the conductivity distribution of the flow inside a pipe. The conductivity data can be used to determine concentration data by using the Maxwell's equation. By analyzing the concentration distribution of the components in a two-phase flow at various locations, the optimum location downstream of the slotted orifice plate where the two-phase flow becomes most homogeneous for different flow conditions can be determined.

In today's oil and gas industry, the importance of accurate measurement of wet gas flows has become paramount due to the recent growth in production costs and continuous fluctuation in crude oil prices. Typical wet gas applications have Gas Volume Fraction (GVF) ranging from 95 to 100 percent and hence the accurate measurement of the phase fractions, especially the water fraction at such low liquid flowrate is a serious challenge. Standard multiphase flow meters were found to be inadequate to operate in such conditions. Hence significant effort is taken by several manufacturers into research and development of ‘wet gas’ flow meters which can accurately measure the three-phase flowrates. Taking on the challenge, an inline non-nuclear wet gas metering system was field tested in Argentina to measure the three-phase flow rates under existing field operating conditions and the results were compared to an existing conventional test separator readings to find out if it can serve as a reliable replacement to the expensive test separator.