WE Report

Lessons Learned

Lesson Learned





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Report No.

163

Discipline/Origin

Drilling
No origin

Well

Brasse Appraisal
31/7-2 S

Date created

2017/09/28
2992 days ago

Project Phase

Operational
Project Phase

LL Type/Classification

Location specific
Negative

Deepsea Bergen


What happened in Reservoir section:
Stick clay was observed in the lower Fensfjord fm. Up to 22mt overpull was observed POOH, and a wipertrip was performed to TD prior to backreaming out of hole into the 9 5/8″ shoe in preparation for wireline logging.

What Was Planned

Drill 8 1/2″ hole through the Fensfjord fm.

What Was Learned

Stick clay observed in the lower Fensfjord when drilling with KCl Glycol WBM with KCl concentration at 155 kg/m3.

What Actions Are Required

Recommend to have KCl concentration above min. 160 kg/m3 for future wells for drilling Fensfjord fm with KCl Glycol WBM.

EDITOR


CLOSE LL (testing)





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