What Schlumberger recommended
The proposal included CemPRIME Scrub engineered scrubbing spacer enhanced with surfactants and mutual solvents to help thin and remove mud in the washouts; a formation integrity test (FIT) to assess safe cement placement rate; pumping at a high displacement rate (1,400 L/min as determined from the FIT); minimal mud yield point of 14 lbf/100 ft2.
What happened
The spacer train and cement were pumped as designed. Top of cement reached the planned depth with a successful 3,000-psi pressure test and excellent cement bond across the section.