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Salinity scan with prototype development

To develop a complete solution for increasing the performance of offshore oil fields by determining the salinity of produced water in each well flow. The salinity scan will measure the salinity of the water mixed in oil as obtained after separation of the different phases of the fluid.

Euro Techniques Industries and Tool-Tech AS have formed a partnership to develop and test a prototype of the salinity scan The salinity scan project includes two and a half years of the following major steps for an estimated cost of 837,900€: 1. Creating and making a lab setting of targeted elements (tank, separator, salinity sensor, level sensor) for running simulations; 2. Analysis of feedback on test models; 3. Developing at scale 1 of a prototype of the sensor taking into account the subsea conditions; 4. Completion of a test bench for the sensor; 5. Analysis of the performance of the salinity sensor; -------------------------------------------------------------------------------------------------------------------------------------- In order to get the information needed for offshore production control, separate subsea flow monitoring must be done on each well. If the subsea flow meter is not reading the correct well flow phase distribution, the well control may not be optimal. Flow meters are calibrated to a certain salinity but the composition /- salinity in produced formation water can vary over time. If the salinity in the produced water changes, the flow meter will not show the correct gas fraction reading. The overall goal of the project is to provide better process data than what is currently available from subsea multiphase flow meters. The product is mainly aimed at the subsea after market and shall be a tool in increased oil recovery. The idea of the project is to develop and demonstrate a new approach to complement existing subsea multiphase flow monitoring techniques in order to: • Avoid inaccuracy of installed subsea multiphase meters due to change in salinity of produced water. • Avoid expensive sampling of produced fluid for surface analysis, which only works as spot checks and may only be done one time, if at all because it involves offshore vessel and subsea intervention operations. The new invention will make sampling accessible via subsea communication when required. • Provide reference data for verification of phase distribution in produced fluid that can be used for comparison with flow meter readings or provide such data on subsea wells without flow meters. • Provide a means of detecting water injection break-through in the subsea reservoir. • Provide produced fluid salinity data that can be useful information for production optimization and improved control of corrosion and scaling. The subsea sampling and analysis system will enable readings of the salinity of produced water and the well flow composition of a single well through sampling, separation and analysis. Produced water salinity and fluid phase distribution are slowly changing parameters. Unlike a flow meter which is measuring instantaneous multiphase flow, the sampling system will be used to accurately measure the salinity of the produced water and the phase distribution (oil, water and condensate) of a representative sample from the well flow. New samples can be taken as often as required. The invention can be used to complement subsea flow meters in order to ensure that the phase distribution of the produced fluid is correctly measured through reading of correct salinity of the produced water and measurement of the phase separation in a subsea flow sample. The development of a sampling, separation and monitoring system must be done with attention to the details and technical challenges in every step. Before making a sensor, we must qualify the multiple processes and key parameters in regards to the physical & chemical compositions of the fluid. But knowledge of these parameters is not alone sufficient, because you have yet to define, test and qualify the measurement methods in a challenging condition; integration into a subsea installation. In this context and to the many difficulties that we can foresee, we chose to conduct a study in several phases: - Phase 0: validation of the separation process prior to the measurement of non-homogeneous mixtures of light oil and water under varying conditions and representative of the oil fields; - Phase 1: produce a full scale prototype; - Phase 2: development of an online testing and actual prototype testing. We have already studied phase 0, which is an indispensable preliminary to any future development and we received approval for a FNS grant for phases 1 & 2. This phase 0 allowed us to define roughly the sensor and with the help of customers, to set minimum specifications.
Acronym: 
S.S.P.D
Project ID: 
7 646
Start date: 
01-10-2012
Project Duration: 
27months
Project costs: 
840 000.00€
Technological Area: 
Sensor Technology related to measurements
Market Area: 
Oil and Gas Drilling, Exploration and Extraction Equipment

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