No user selected
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Report No.
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311 |
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Discipline/Origin
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Drilling |
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Well
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Canela |
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Date created
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2019/01/07 |
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Project Phase
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Planning |
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LL Type/Classification
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Cement |
Island Innovator
Negative Cement LL with DNO
Canela (6507/7-16 S) – Surface section
What happened:
Cement slurry was changed to a gas-tigh slurry due to encountering shallow gas in pilot hole. Due to fracture margin and risk of losses only the lower part og the slurry was converted to a gas-tight slurry as not possible to convert lead slurry to gas-tight. Gas bubbles were observed at sea bed when cement started setting up. Most likely from interval where gas tight cement was not used.
What was planned:
Cement the 20″ casing to seabed using regular G-cement slurry.
What was learned:
A regular G-cement tail slurry required a lot of chemicals to make the lsurry gas tight vs. a light weight cement.
What actions are required:
Evaluate to use a light weight cement slurry for cmenting the top holes to easier enable conversion to a gas tight slurry. If drilling in area with potential for shallow gas evaluate to plan holes with gas tight cement/foam cement.
Island Innovator
What happened in Surface section:
Cement slurry was changed to a gas-tigh slurry due to encountering shallow gas in pilot hole. Due to fracture margin and risk of losses only the lower part og the slurry was converted to a gas-tight slurry as not possible to convert lead slurry to gas-tight. Gas bubbles were observed at sea bed when cement started setting up. Most likely from interval where gas tight cement was not used.
Cement the 20″ casing to seabed using regular G-cement slurry.
A regular G-cement tail slurry required a lot of chemicals to make the lsurry gas tight vs. a light weight cement.
Evaluate to use a light weight cement slurry for cmenting the top holes to easier enable conversion to a gas tight slurry. If drilling in area with potential for shallow gas evaluate to plan holes with gas tight cement/foam cement.
EDITOR
CLOSE LL (testing)
New Lesson Learned
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- PROJECT PHASE
- Operational
- Planning
- Reporting
- CLASSIFICATION
- Positive
- Negative
- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
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- RIG
Borgland Dolphin- Island Innovator
- Well
Oselvar- Gomez
- PROJECT PHASE
- Operational
- Planning
- Reporting
- CLASSIFICATION
- Positive
- Negative
- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
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- RIG
- Island Innovator
- Well
- Gråspett
- PROJECT PHASE
- Operational
- Planning
- Reporting
- CLASSIFICATION
- Positive
- Negative
- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
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- RIG
- Deepsea Bergen
- WELL
- Brasse
- Rungne
- PROJECT PHASE
- Operational
- Planning
- Reporting
- CLASSIFICATION
- Positive
- Negative
- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
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NO LLs for INEOS- RIG
- Borgland Dolphin
- WELL
- Fat Canyon
- PROJECT PHASE
- Operational
- Planning
- Reporting
- CLASSIFICATION
- Positive
- Negative
- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
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- RIG
- Deepsea Yantai
- Well
- Shrek
- PROJECT PHASE
- Operational
- Planning
- Reporting
- CLASSIFICATION
- Positive
- Negative
- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
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- PROJECT PHASE
- Operational
- Planning
- Reporting
- CLASSIFICATION
- Positive
- Negative
- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
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Kall\u00e5sen<\/a><\/li>\n\t\t\t\t\t\t\t\t
Gr\u00e5spett<\/a><\/li>\n\t\t\t\t\t\t\t\t
Gomez<\/a><\/li>\n\t\t\t\t\t\t\t\t
Oselvar<\/a><\/li>\n\t\t\t\t\t\t\t\t
Rungne<\/a><\/li>\n\t\t\t\t\t\t\t\t
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- Logistics<\/a><\/li>\n\t\t\t\t\t\t\t\t
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- Sidetrack design<\/a><\/li>\n\t\t\t\t\t\t\t\t
- Time Estimate<\/a><\/li>\n\t\t\t\t\t\t\t\t
- Shallow Gas<\/a><\/li>\n\t\t\t\t\t\t\t\t
- BOP<\/a><\/li>\n\t\t\t\t\t\t\t\t
- Casing<\/a><\/li>\n\t\t\t\t\t\t\t\t
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