Neftemer's Multiphase Meter
Origins of the Concept
The origin of Neftemer dates back to the late 1970s, when oil companies were becoming interested in developing multiphase meters. The basis is a nucleonic two-phase meter that had been developed for the Russian nuclear industry by the Space Institute in Leningrad, and it was realised that a similar approach would work for the oil and gas industry.
For over the 25 years, prototype systems were built and tested in the Byelorussia oil fields, with the objective of delivering a robust and cost-effective multiphase meter suitable for land-based wells typically producing less than 1000 bbl/day, with relatively high water cuts. This concept was developed further by Complex-Resource in St. Petersburg.
Multiphase Meter Installations
Currently, several hundred wells in Siberian oil fields are monitored by single or multiple versions of the Neftemer Multiphase Meter. Units are also in place in Canadian oil fields, including successful CHOP (Cold Heavy Oil Production) and SAGD (Steam Assisted Gravity Drainage) installations.
The benefits include:-
- Neftemer's Multiphase Meter is vital for the future cost-effective production of oil and gas.
- Neftemer's unit dramatically reduces the costs of traditional three-phase measurement, enabling companies to reduce their installation and operating costs.
Multiphase Meter Construction
The diagram below depicts the main components in a Neftemer Multiphase Meter. The Neftemer Multiphase Meter is a non-intrusive unit that is easy to install, requiring less time and skill than conventional assemblies. The unit supports phase fraction, velocity measurement and pattern recognition measurement categories. The unit has been tested on a wide range of oil types, and can readily handle even the heaviest oils. It has been tested for accurate measurement in temperatures ranging from -50o to +50o centigrade.
Multiphase Meter Operation
The diagram below depicts the main elements in a typical Neftemer installation. The Multiphase Meter samples and calculates the liquid, gas and watercut within the flow every 2 seconds. Neftemer's sophisticated mathematical analysis and statistical signal processing yields accurate results which can then be transmitted over a secure data link in real-time. The results of processing can be transmitted over a secure data link in real-time.
Neftemer Scope of Supply
The diagram below illustrates the main components supplied in a typical Neftemer Multiphase Meter installation. The Multiphase Meter comprises the Gamma housing, Gamma detector, oil well pipe bracket and Data Processing Unit. The Data Process Unit contains the Power Unit (with UPS backup), Main and Auxiliary PLCs. The Main PLC is connected to the IT subsystem, made up of the commissioning PC, Primary and Secondary DCS links. From the diagram it can be seen that the installation costs and footprint of Neftemer's Multiphase Meter are minimal.
The Multiphase Triangle
The diagram below provides a useful tool in visualising multiphase flows. The vertices of the triangle represent single-phase gas, oil and water, while the sides show two phase mixtures. Any point within the triangle represents a unique three phase mixture. The transition region (in Blue) indicates where the liquid fraction changes from water-in-oil to oil-in-water. The side of the triangle shows common multiphase flow regimes which are affected by temperature, pressure, viscosity and flowline orientation. Several multiphase applications can be seen from wet gas (at the top) to high water cut (bottom right).
Summary of Benefits
Neftemer's clamp-on design is entirely non-intrusive and suitable for a range of different line sizes. The unit requires less skill to install and maintain. It's design allows it to be retro-fitted to existing wells. Neftemer's sturdy construction allows for a significant reduction in maintenance costs and supports remote monitoring applications via satellite. The unit can readily handle even the heaviest oils. It has been tested for accurate measurement in temperatures ranging from -50o to +50o centigrade.