WE Report

Lessons Learned

Lessons Learned865


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

PGNiG
8204 – PGNiG

Deepsea Yantai Drilling Operational 6501/10-1
Tomcat
Top hole 03/02/2025 Lost marker buoys out of basket when deploying.

Drilling Engineer


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PGNiG
6747 – PGNiG

Deepsea Yantai Marine
Own Experience
Operational 6501/10-1
Tomcat
Pre-Lay 15/09/2024
We started on anchor 4. This anchor was together with anchor 5 and 6 supposed to be installed to . . .

Stian Engvik / Stig Seland


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PGNiG
6223 – PGNiG

Deepsea Yantai HSEQ
Own Experience
Planning 6501/10-1
Tomcat
Other 08/05/2024
An evaluation of some changes was not documented.
A MOC process should cover any RELEVANT changes . . .

Ã…se Kristin Pettersen / Stig Seland


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PGNiG
6874 – PGNiG

No Rig Other
Own Experience
Planning 6501/10-1
Tomcat
N/A 06/11/2023 It is strong currents at the location, and it was very hard to keep the ROV stable when surveying . . .

Anniken Meisler / Anniken Meisler



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PGNiG
5838 – PGNiG

Deepsea Yantai External Environment Planning 6501/10-1
Tomcat
Environmental Seabed inspection 19/06/2023 During preparation of SoW, Marine department needed input from Engineering Company (InterMoor) to . . .

Stian Engvik / Morten Laget



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PGNiG
5834 – PGNiG

Deepsea Yantai Drilling
Own Experience
Planning 6305/10-1
Tomcat
N/A 15/06/2023
BO&K Analysis performed in Aug 2022, with a sensitivity on revised reservoir data.

The . . .

Richard Mollison / Morten Laget



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PGNiG
4923 – PGNiG

Deepsea Yantai Logistics
Own Experience
Planning 6608/1-1 S
Copernicus
Other 03/10/2022 With this focus the mobilization plan became a live document and with a weekly focus, ensuring all . . .

Johan Kjos-Hanssen / Morten Laget



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PGNiG
4914 – PGNiG

Deepsea Yantai HSEQ
Own Experience
INTERNAL
End of Well 6608/1-1 S
Copernicus
Other 26/09/2022 We didn’t ask of information from the DSV during the operation

Ã…se Kristin Pettersen / Morten Laget


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PGNiG
4912 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
Production section 20/09/2022 Time was spend circulating hole clean and even MW in/out.

Drilling Engineer / Morten Laget


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PGNiG
4910 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
P&A 19/09/2022 After setting 8 1/2″ OH P&A Cement Plug the plan was to circulate clean at 100 m over TOC and . . .

Drilling Engineer / Morten Laget


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PGNiG
4907 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
17/09/2022 During bulking the boat was alongside and was covered in dust

Drilling Engineer / Morten Laget


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PGNiG
4905 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
P&A 16/09/2022 To balanced the cement plug by pumping more spacer behind the cement plug.

Drilling Engineer / Morten Laget


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PGNiG
4817 – PGNiG

Deepsea Yantai HSEQ
NEA Q&A
Planning 6608/1-1 25/08/2022

Hearing comment from the Norwegian Directorate of Fisheries
Fiskeridirektoratets oppgave ved slike . . .

Sanne Risbakk / Christina Sæland Rødne



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PGNiG
4819 – PGNiG

Deepsea Yantai Drilling
PSA Q&A
Planning 6608/1-1 Other 25/08/2022

Overburden Lithologi/Subsurface-prospektet 6608/1-1 S Copernicus i PL1017

Sanne Risbakk / Morten Laget



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PGNiG
4820 – PGNiG

Deepsea Yantai Drilling
PSA Q&A
Planning 6608/1-1 Other 25/08/2022

Well design and drilling operation with focus on risk assessments for each hole section,
including . . .

Sanne Risbakk / Morten Laget



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PGNiG
4821 – PGNiG

Deepsea Yantai Drilling
PSA Q&A
Planning 6608/1-1 Other 25/08/2022

Results from Blowout & kill study and input parameters from subsurface, including chosen
relief . . .

Sanne Risbakk / Morten Laget



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PGNiG
4822 – PGNiG

Deepsea Yantai HSEQ
PSA Q&A
Planning 6608/1-1 Other 25/08/2022

The question of how PGNiG relates to the fact that the estimated annual
probability of loss of MSF . . .

Sanne Risbakk / Ã…se Kristin Pettersen



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PGNiG
4823 – PGNiG

Deepsea Yantai Marine
PSA Q&A
Planning 6608/1-1 Other 25/08/2022

The question of how the operator (PGNiG) ensures that the site-specific
criteria set for . . .

Sanne Risbakk / Morten Laget



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PGNiG
4824 – PGNiG

Deepsea Yantai Marine
PSA Q&A
Planning 6608/1-1 Other 25/08/2022

How are the weather conditions monitored ?​

Sanne Risbakk / Morten Laget



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PGNiG
4825 – PGNiG

Deepsea Yantai Marine
PSA Q&A
Planning 6608/1-1 Other 25/08/2022

It is sometimes run with reduced power from auxiliary engines for operation of the DP to save fuel. . . .

Sanne Risbakk / Morten Laget



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