The Details

Extensive laboratory testing was performed prior to the drilling and completion of the well. Shale inhibition and solids contamination tests were done at the M-I SWACO Regional Laboratory in Jakarta. Filtercake cleanup efficiency was evaluated and extensively tested at Constien & Associates Laboratory in Oklahoma, USA.

The GLYDRIL-IDCAP D system was chosen since it could provide good shale inhibition while maintaining good filtercake cleanup efficiency with 10% HCl. A total of 433 m (1420 ft) of reservoir section was drilled with no hole-related problems.

The initial dilution rate was 1.65 bbl/m (0.50 bbl/ft) drilled. The dilution rate was increased to 3.0 bbl/m (0.91 bbl/ft) drilled during the last 140 m (459 ft) because the formation being drilled was primarily siltstone. Dumping and dilution were performed simultaneously to keep the fluid properties within specification.

Although four VSM shakers, dressed with 185-mesh DURAFLO screens, were available, only two were used while drilling the reservoir section. These two shakers could handle a 600-gpm flow rate.

A 1.15-sg (9.6 lbm/gal) filtered KCl brine was used as a completion fluid. The sand screen was set in place as programmed. Filtercake cleanup was performed twice with a 10% HCl solution. A 1.03-sg (8.58 lbm/gal) filtered KCl brine was used as a packer fluid.

Questions? We’ll be glad to answer them.

If you’d like to know more about the GLYDRIL-IDCAP D system for Reservoir Drilling Fluid applications and how it’s performing for our other customers, please call the M-I SWACO office nearest you.