This North Sea installation was carried out for a leading international operator with a deep, high temperature, gas-condensate producing well. The well was over 5km deep with a bottom-hole temperature of 190°C and was subject to calcite scaling.

Our pre-installation well survey, simulation modelling and scaling analysis identified a number of factors at play in this well:

• Deposition increased in line with well depth.
• The scaling tendency was greater under flowing conditions.
• Turbulence caused by downhole architecture increased scaling at specific focal points.
• As the focal points were plugged with calcite, secondary pressure loss and downstream turbulence resulted in increased scaling.
• As pressure is likely to drop over time, the scaling tendency would increase, especially if the well began to produce more water.

ClearWELL’s technology is the ideal solution for this type of well, providing continuous protection despite the challenges of temperature, pressure, turbulence and depth. Once installed we can monitor unit performance remotely.