WE Report

Lessons Learned

Lessons Learned865


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

DNO
296 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
N/A 07/01/2019 Did not include the sidetracks.


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DNO
297 – DNO

Island Innovator HSEQ Planning 6507/7-16 S
Canela
N/A 07/01/2019 No description of the specific procedures for the project


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DNO
298 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
N/A 07/01/2019 BOP configuration was not included in the Rig Intake Risk Assessment


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DNO
300 – DNO

Island Innovator HSEQ Planning 6507/7-16 S
Canela
N/A 07/01/2019 Confusion regarding alert to the PSA on a medevac caused by sentence in Emergency Prepardness . . .


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DNO
301 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
N/A 07/01/2019 DNO subsurface department wanted to use new OBM for drilling the sidetrack reservoir section.


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DNO
302 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
N/A 07/01/2019 Perform sidetrack casing design using PP and FG based on planned sidetrack trajectory.


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DNO
303 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
N/A 07/01/2019 Geological target boxes developed late in planning phase. This resulted in less time for evaluating . . .


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DNO
304 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Rig move 07/01/2019 DP trial was performed, spent 5 effective hours (+ 3 hours WOW).


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DNO
307 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Pilot hole section 07/01/2019 Pilot hole encountered shallow gas. Observed shallow gas flowing out of well when RIH to open up . . .


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DNO
308 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Pilot hole section 07/01/2019 Pilot hole drilled to TD before identifying shallow gas. Resulted in having to order out more . . .


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DNO
309 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Surface section 07/01/2019 Not able to use the IRN to MU the motor assembly to the ARC-9 assembly due to short distance between . . .


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DNO
310 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Surface section 07/01/2019 Not optimal cement recipe, needed 25 min to clean tanks between lead and tail slurry.


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DNO
311 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Surface section 07/01/2019 Cement slurry was changed to a gas-tigh slurry due to encountering shallow gas in pilot hole. Due to . . .


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DNO
312 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Intermediate section 07/01/2019 The 17 1/2″ section was drilled, but it proved difficult to get hold of Glycol for the KCl mud.


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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
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
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
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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Wellesley
1138 – Wellesley

Transocean Arctic Marine
PSA Q&A
Planning 25/1-13
Balcom
N/A 04/12/2018

AFC Side 19. Hvilken hundreårsbølge er lagt til grunn for ankringsanalysene?

Karina Helle / Morten Laget


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