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Title: Formation water detection and the effect of MEG
Author: Kenneth Gundersen Richard Streeton Prashant Bajpayee
Source: 2018 North Sea Flow Measurement Workshop
Year Published: 2018
Abstract: Detection of formation water breakthrough for high GVF wetgas wells is important for flow assurance purposes, including scale, hydrate, and corrosion management. The small amount of water present makes this distinction between fresh condensed water and saline formation water a very challenging task. In some applications, this is further c omplicated by the fact that hydrate inhibitoers, e.g. MEG , is injected upstream the point of measurement and might influence the detection. Traditionally, formation water detection uses the fact that formation water is saline (i.e. electrically conductiv e). Low salinity and temperature will however reduce the sensitivity of such methods. TechnipFMC has therefore, for the MPM meter, developed and qualified two methods for formation water detection (FWD), handling both high and low water salinities. These a re presented in chapter 2 . Methods for evaluating the sensitivity of both methods have been developed and are presente d , and these methods allow one to choose the most sensitive method for a given application.

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