Case Study: a leading North Sea oil field company achieves less than 0.05% solids in brine with SLB's SAFE-SURF EU casing cleaning agent

SAFE-SURF EU Casing Cleaning Agent Reduces Solids in Brine to Less than 0.05%

SLB worked with a leading North Sea oil field company drilling the Cygnus field, where the operator needed to optimize displacement efficiency on a rig with limited pit space while reducing cleanup costs and meeting strict North Sea environmental regulations. The company was challenged by the need to use lower-performance chemicals that could increase waste volumes and rig time, so it sought a more effective casing cleanup solution.

SLB proposed the SAFE-SURF EU casing cleaning agent to improve cleanup performance during the displacement operation. Using a planned pill train and pit-based blending program, the operator achieved less than 0.05% solids in the brine, met its target, and confirmed water-wet pipe with no residual oil at surface; SLB also helped shorten cleanup time and reduce costs through improved displacement efficiency.