FORM-A-BLOK Pill Mitigates Approximately 92% of Downhole Fluid Loss, Onshore Iraq | Schlumberger
Tech Report
Location
Middle East, Iraq, Asia, Onshore
Background

While drilling in the Hartha Formation, a major operator incurred total losses. An offset well was delayed for more than 5 days while curing similar losses with cement plugs, so the operator sought a more efficient solution for the new well. M-I SWACO proposed squeezing a FORM-A-BLOK high-performance, high-strength lost circulation pill into the thief zone to prevent further losses and strengthen the wellbore sufficiently to enable the operator to continue normal pull-out-of-hole operations and run 9 5/8-in casing to section TD of 2,122-m MD.

Products Used

FORM-A-BLOK Pill Mitigates Approximately 92% of Downhole Fluid Loss, Onshore Iraq

Treatment of well experiencing total losses reduces loss rate from 18 to 1.5 m3/h within 6 h vs. 5.2 days

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The FORM-A-BLOK pill reduced the dynamic loss rate from 18 to 1.5 m3/h. Before the pill was pumped, a total of 235 m3 of fluid had been lost into the formation. The pill cured the losses in 6 h as opposed to 5.2 days for a 95% time savings.
Products Used

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