An offshore Qatar operator was concerned with the potential for high fluid losses and differential sticking while drilling a fractured and faulted carbonate formation. The formation pressures vary from 4 ppg to 9.1 ppg equivalent mud weight. High torque was often encountered, requiring 2-3% lubricant by volume in the lateral. The problems occurred primarily in fields with depleted zones, microfractures, fractures and faults.
FLC 2000® was added to the drilling program to determine if it would eliminate problems encountered on previous wells. The objective with FLC 2000 was to reduce rig time, fluid losses and overall costs for the drilling operation. The operator tested the product prior to approval and determined they would run a concentration of 8 ppb to keep the sand bed test (SBT) invasion at approximately 4 cm.
FLC 2000® met all performance KPIs for the well. The reduction in lubricant cost saved at least $200,000. The operator drilled the lateral interval with minimal losses, no wellbore stability issues, no differential sticking, improved hole cleaning and reduced torque.