WE Report

Lessons Learned

Lessons Learned865


Operator Rig Discipline / Origin Project Phase Well Section Date What Happened

DNO
314 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
Intermediate section 07/01/2019 KCl WBM was used for drilling the 17 1/2″ section to 1200 m. The hole was observed in good condition . . .


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DNO
315 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Intermediate section 07/01/2019 Had to increase MW from the planned 1.48 sg to 1.52 sg at TD due to cavings.


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DNO
316 – DNO

Island Innovator Operational 6507/7-16 S
Canela
Production section 07/01/2019 Drilled section with planned mud and mud weight without problems with cavings. Cavaings identified . . .


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DNO
317 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
Production section 07/01/2019 Drilled section with planned mud and mud weight without problems with cavings. Cavaings identified . . .


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DNO
318 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
N/A 07/01/2019 Used the 1 x 2 m pup, had we crossed threads we had no back-up.


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DNO
320 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
Production section 07/01/2019 Great care taken breaking circulation at casing TD/washing down to land off. Used 100 lpm steps, . . .


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DNO
321 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
Production section 07/01/2019 High values of LOT/FIT expected; 1.95 sg EMW. Value of ESD measured by LWD tool ahead of FIT was . . .


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DNO
322 – DNO

Island Innovator HSEQ Operational 6507/7-16 S
Canela
N/A 07/01/2019 Unplanned contamination of DW tanks with SW.


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DNO
323 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
N/A 07/01/2019 Unplanned contamination of Versatec 1.52 sg OBM with DW – OWR increased from 70/30 to 60/40. Checked . . .


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DNO
324 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
Reservoir section 07/01/2019 …., F/C at shoe, 400 liter gain in trip tank. Closed in well, checked for PBU (none), RIH to TD, . . .


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DNO
325 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
N/A 07/01/2019 Only one subsea engineer on rig.


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DNO
326 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
N/A 07/01/2019 Fluid slopping into flowline from shaker pits due to Free Surface Effect during periods of high rig . . .


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DNO
327 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
Reservoir section 07/01/2019 ESD accidentally operated in wireline unit.


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DNO
328 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
P&A 07/01/2019 During POOH with 9 5/8″ cutting assembly the pipe lifted out of slips due to knives hanging up in WB . . .


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DNO
329 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
P&A 07/01/2019 During M/U of 20″x36″ cutting assembly (MOST tool), had to break off MOST tool above space out pup . . .


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DNO
319 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
Production section Deliberately added 2 m pup after log interpretation showed potentially weak limestone stringer close . . .


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DNO
1303 – DNO

Island Innovator Operational 6507/7-16 S
Canela
Mye vær utfordringer Decemeber. HTI / Høy HS opp mot 7mtr Hs og 12 mtr bølger.


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DNO
1304 – DNO

Island Innovator Operational 6507/7-16 S
Canela
NPT Canela


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