Case History

ROCKBLOCK 3 Significantly Reduced Losses in Problematic Tayarat Formation in Kuwait


In the Burgan Field, an operator was experiencing severe mud losses, over 200 bbls/hr, in a highly-deviated well in the Tayarat Formation.

Severe losses began at 4608-ft. while drilling 16-in. with a 9 lb/gal water-based mud (WBM). The operator continued drilling to 4658-ft., expanding the lost zone before utilizing lost circulation material (LCM). At that point, dynamic losses increased to 250 bbls/hr and static losses reached 180 bbls/hr. After experiencing stuck pipe twice, the operator was able to pull out of hole (POOH) seven stands.


The decision was made to pump a 50 bbl pill of ROCKBLOCK 3 (50 lb/bbl). After the first pill was pumped, dynamic losses were reduced to 120 bbls/hr and static losses to 60 bbls/hr. Another 50 bbl pill of ROCKBLOCK 3 (50 lb/bbl) was pumped. The operator POOH to 4070-ft., the pill was cleared, and dynamic losses were reduced to 30 bbls/hr.


ROCKBLOCK 3 reduced total losses over 85%, allowing the operator to drill to total depth of 7990-ft.

After spotting the first 50 bbl pill of ROCKBLOCK 3 dynamic losses were decreased from 250 bbl/hr to 120 bbl/hr with static losses of 60 bbls/hr. After spotting the second 50 bbl pill of ROCKBLOCK 3, dynamic losses dropped to 30 bbl/hr and static losses were 5 bbl/hr.

This website uses cookies to help us understand how our site is used and improve the user experience. By using our site, you consent to the use of cookies. To learn more or manage your cookie preferences, please see our privacy policy.