Process Controls Index
Process Controls Index
ProAnalysis design and sell an oil in water monitor or analyzer for crude oil production or produced water treatment systems. We deliver solutions that will give reliable and continuous measurements in real time at the ppm level. ArugusŪ oil in water analyzers require low or no maintenance. This is made possible due to our unique in-line probe concept, and our automatic cleaning of the probe.
Oil in water monitor in the ArgusŪ product range is designed to meet customers' needs. ProAnalysis have designed the solutions best suited for the following applications:
Argus is based on the measurement principle (laser-induced) fluorescence. A laser, uniquely developed for the sensor, emits ultraviolet light directly into the process line by fibre optics. The laser light interacts with crude oil, and fluorescence is emitted, collected, transmitted by fibre optics, spectrally and temporally filtered and finally quantified by a light sensor.
The technology offers several significant advantages:
• Established and proven measurement principle.
• Stable and robust under harsh and changing process conditions (temperature, pressure, solids, gas, etc.).
• Accurate quantification of dispersed oil through the measurement of aromatic hydrocarbons (PAHs) - even at ppb levels.
For operators the control module can deliver valuable information about the water treatment system. By measuring the impact of actions taken in the process in realtime, the consumption of chemicals can easily be optimised and controlled.
Argus Manager User Software (Back To Top)
ArgusŪ Manager is an application for installation on a remote computer and provides an easy-to-use interface to operate the system.
The software offers full instrument diagnostics, control, calibration, as well as visualisation of current and historic oil in water concentrations, trends and statistics. The software has a user-friendly graphical user interface.
Main features of Argus Manager:
• Displays continuous current and historical data (chosen time intervals).
• Statistics feature (maximum, minimum and average is calculated for displayed time interval).
• System status indication (measurement, cleaning, alarm) and system parameters, including sensor signal quality, laser pulse energy, field enclosure temperature and laser diode temperature.
• Easy calibration of the instrument, including manual sample indication for better and faster calibration
• Control functionality of laser cleaning parameters (frequency, duration, intervals) and OiW data acquisition parameters.
• User-friendly, with a comprehensible graphic user interface
• Compatible with all instruments based on the Argus technology platform
In addition to Argus Manager, Argus also provide measurement data on various interface formats (digital and/or analogue) to operator control system.
ArgusŪ Operating Software (Back To Top)
• Integrated control of all Argus" components (laser, optics, sensors)
• Continous real-time data acquisition and analysis
• Internal data storage on stable media (flash disk) - holding data for months
• Facilitating external communication through various digital and/or analogue formats
• Ethernet communication with Argus Manager (see below) and operators offshore/onshore
• Robust, stand-alone system - designed for long term operation
Automated Self-Cleaning Technology - Maintenance-Free Oil In Water Monitor (Back To Top)
To handle challenges related to contamination (scale, etc.) from a demanding offshore process environment, Argus is equipped with an ultrasound-based technology for self-cleaning of the in-line probe. Cleaning of the optical process interface is mediated through an advanced high power excitation of the probe"s sapphire window.
The proprietary ultrasound-based self-cleaning technology has proven highly efficient at installations facing severe challenges from e.g. scaling on process equipment, making Argus practically a maintenance-free OiW monitor at any application.
The automated self-cleaning of the in-line measurement probe can be interval based or condition based. The Argus instruments are equipped with two signal channels - both a fluorescence signal and a light scatter signal. Condition based self-cleaning is enabled using the light scatter signal as a reference for the presence of contamination (e.g. scaling) on the optical window.
Ultrasound-based cleaning of the in-line probe is currently in operation at a number of different oil production platforms in the North Sea and abroad.
In-Line Measurement - No Bypass Loop Required (Back To Top)
The main challenge associated with traditional OiW monitors is the need for bypass loops, which often are complex, expensive and require frequent maintenance. The Argus technology eliminates these problems as measurements are done through a permanent in-line probe installed directly in the pipeline.
The solution offers several significant advantages:
• Low installation costs, eliminating the need for expensive bypass systems. Only a single flange is needed for the in-line probe.
• Eliminates high maintenance costs resulting from bypass lines being blocked by deposits (scale, etc.).
• Representative measurements under real process conditions. Sampling through bypass systems is problematic under varying process conditions.
• No moving parts - a non-mechanical system
• No consumables - a non-chemical system
With the in-line probe design, the Oil in Water monitor will not be a component in a system, and ProAnalysis takes total responsibility for Oil in Water monitoring. Elimination of the engineering and construction of bypass lines reduces both installation costs and service costs to a minimum.
Insertion And Retraction Of In-Line Probe (Back To Top)
Argus is equipped with a retraction tool to insert and retract the in-line probe during normal process conditions (full process pressure) in a safe and controlled manner. Different retraction tools are designed for low-pressure and high-pressure applications.
See a demonstration of the retraction of an in-line probe at one of our installations (low-pressure):
Low-pressure Oil in Water Monitor: ArgusŪ Environment (Back To Top)
Oil in Water monitor for low-pressure applications
Argus Environment monitors Oil in Water concentrations at water discharges to the environment, online and real time. Oil & Gas operators are able to comply with HS&E regulations and reduce OiW levels without the need for manual water sampling and laboratory analysis.
Key benefits of Argus Environment:
• Enables replacement of manual sampling and laboratory analysis, eliminating / minimising the costs associated with such activities.
• Prevents significant oil discharges by means of immediate alarm when OiW levels exceed the defined limit.
• Is easy to install, no complex and expensive bypass loop is required.
• Is maintenance-free, compared to the high level of manual maintenance associated with traditional (bypass) OiW monitors.
• Facilitates remote monitoring of OiW (offshore or onshore), fully integrated with industry standard control systems.
High-Pressure Oil in Water Monitor: ArgusŪ Process (Back To Top)
Oil in Water monitor for high-pressure applications
Argus Process monitors Oil in Water concentrations at high pressure and/or temperature locations in the water treatment process, paving the way for new applications for online OiW monitors. Oil & Gas operators are able to manage the process with real time OiW data from single or multiple measurement points throughout the process, providing unique process control.
Key benefits of Argus Process:
• Improves performance of produced water treatment systems.
• Increases throughput where oil production is bottlenecked by the water treatment system.
• Minimises OiW levels, achieving mandated HS&E targets for reductions in OiW.
• Reduces operational costs (use of chemicals, maintenance, etc.).
High Pressure High Temperature (HPHT) OiW monitoring
With its in-line probe, the unique Argus technology design facilitates measurements at higher pressures and temperatures, enabling measurements throughout the water treatment process. Argus OiW monitors can be used downstream separators, hydrocyclones, degassers and other process equipment, monitoring different stages of the process and providing the operator with unique process control.
Multipoint Oil in Water Monitor Systems: ArgusŪ Multipoint (Back To Top)
Multiple oil in water measurement points in one system
The Argus design enables several in-line measurement probes to be connected to the same central control unit in a multipoint Oil in Water monitoring system. Both low-pressure and high-pressure measurement points can be implemented in the system and the control unit can be located in a hazardous area or a safe area. The flexibility of the Argus technology makes ProAnalysis able to design a system that fits customers needs exactly.
Hazardous area - EX unit
Up to 4 in-line measurement probes can be connected to the ATEX certified field enclosure housing the Argus contol unit (laser, optics, electronics etc.). A typical setup includes one measurement point at the inlet to the produced water treatment system, one measurement point at the outlet, and - if needed - one or two measurement points at different stages of the process. Such a system provides unique control and information about the efficiency of the produced water system.
Safe area - instrument panel
Locating the control unit in a safe are (instrument room or similar) enables up to 12 in-line measurement probes to be connected to the control unit. From one complete Oil in Water monitoring system, one or several produced water treatment trains or systems can be monitored and controlled (before and after treatment, between hydrocyclones etc.). Operators get the full picture of the performance of the different systems, and are able to take qualified decisions based on real-time process data.
Key benefits of Argus Multipoint
• Significantly reduced cost per measurement point compared to using separate oil in water monitors at each measurement point. Costs are reduced at all levels - initial investment, installation costs and service costs.
• Efficient produced water process control and optimization. Monitoring each step of the process enables immediate and accurate response, improving the performance of the produced water treatment system.
• Low space requirements eliminating the need for several separate instruments.
• Condition based maintenance of process equipment.
• Cost reductions from improved water treatment (chemicals etc.)
Subsea Oil in Water Monitor: ArgusŪ Subsea (Back To Top)
Oil in water monitor for subsea application
Most large international Oil & Gas operators have a strong focus on subsea technology, and increasingly more equipment is located subsea. However, subsea separation of oil / gas / water - with a large potential for cost savings - has not yet been implemented.
The ArgusŪ technology is designed for operation in challenging offshore process conditions, and has a number of characteristics that makes it well suited for subsea application:
• Measurement principle: (Laser-induced) UV fluorescence is regarded as the most stable measurement principle, robust under varying and challenging process conditions.
• In-line measurement: A prerequisite for subsea application, as bypass systems (with clogged bypass lines) will be impossible to maintain subsea.
• Measurement at higher pressures and temperatures: A prerequisite, as pressure and temperature often is high in subsea modules.
• Low level of maintenance: Using ultrasound to achieve automated and condition-based self-cleaning of the in-line probe, the need for maintenance is reduced to a minimum. This is one of the most important factors, as there are very limited opportunities for maintenance subsea.
• Long lifetime: Long-life laser and high-quality components, makes the lifetime of an Argus subsea unit 10-20 years.
• Remote operation: Argus has control and diagnostics for all central components in the system. Communication is digital, by Modbus and/or • Ethernet. The instrument can be fully operated remotely.
• Space: In-line measurement, as well as the opportunity for multipoint monitoring, minimizes the space needs for an Argus installation at a subsea module, where space is a critical factor.
• No moving parts.
• ProAnalysis welcomes industry initiatives for a joint development project for the ArgusŪ Subsea.