Ross McCartney has just presented a paper entitled “Everest Well ET-14z: The Complexity of Produced Water Production Revealed” at the SPE Scale Symposium in Aberdeen. The paper was co-authored with Peter Wood and Kevin Angus of Harbour Energy plc. This paper shows how a modified well test was undertaken to help understand the multiple reservoir and downhole factors causing the produced water compositions from ET-14z to be very variable. Once these factors were understood, it was possible to reliably determine the scale and formation damage risks to the well (see the abstract here).