PTIL/PSA

Development of regulation and

standards on the Norwegian

Continental Shelf (NCS)

OWI conference 15th – 16th april 2014Arne M Enoksen

Drilling and Well technologyPetroleum Safety Authority Norway

PTIL/PSA

Content of the presentation

• Post-Macondo actions and considerations

- General conclusions from the PSA study

- North Sea Offshore Authority Forum (NSOAF) audit on well control

- Risk management

- Barrier management

• Regulatory changes

- Well intervention

- Relief well drilling

- Capping and containment

- NORSOK D-010 Well integrity in drilling and well operations

• Risk level on NCS

- Well control incidents

- Well integrity status

PTIL/PSA

Post Macondo considerations

• Technical requirements and risk management (MoC)

• Risk assessment, roles and responsibilities

- To be prepared for the unknown

- Table top exercises

- SJA’s / preshift / prejob meetings

• Communication skills and behavior

- Strategic leadership principles -

- Safety culture – to actively involve drilling contractors and vendors

• Well control

- Focus on purpose built MODU’s and BOP systems (AoC)

- Standardisation of drilling and well intervention systems (NORSOK)

- Training of recruited personnel (Norwegian Oil and Gas – Guideline 024)

PTIL/PSA

Post Macondo considerations

• Well control training:

- Harmonized IWCF and IADC – 5 days training refresher

- Operator specific case based seminars

- Onshore simulator training – both individual and crew based

• Well control organisational learning:

- Well control incident reports and investigations (few and far between)

- Well control audits of third parties (fair amount and effective)

- Cross border well contol audit in the north sea (by regulators in NSOAF)

- Operators capacity and competency in licences (by regulators in Norway)

• Capping and containment

- Contact meetings in 2014 - ongoing

- Operation readyness

- Prequalification process

- Contracts and agreements with 3rd party service providers

PTIL/PSA

Macondo follow up - Industry and PSA

PTIL/PSA

Regulation and standards

• Well Intervention

- Pump- and fluid capacity for well control available on board or nearby the installation when performing well intervention - depending on criticality

- Adapted use of vessel:

- Subsea light well intervention (AoC)

- Stimulation and clean up operations

- Construction work – templates and guidebase

- Replacement of modules

- Setting and removal of X-mas trees (in progress)

- Wellhead removal in P/A operations (in progress)

- NORSOK D-002 Well Intervention, rev. 2, june 2013

- Safety Integrety level (SIL 2) ref. chapter 4.3

- Application grace period from 1.7.2014 – 1.7.2018

- NORSOK D-007 Well Testing, rev 2, september 2013

PTIL/PSA

Regulation and standards

• Well Control

- Well design - according to blowout and kill rate simulation study of one well

- Plan for initiation of relief well drilling with documented redundancy

- Plans for capping to be documented before start up

- NORSOK D-010 4.8 Blow out contingency plan

- Installation specific blowout contingency plan

- Plan for drilling a relief well

- Plan for capping and containment of a blowing subsea well

• a) evaluate the feasibility of capping a blowout scenario at the given water

depth;

• b) identify all connections and possible interfaces from wellhead to flexible

joint;

• c) identify all connections and possible interfaces from XT to interface to

workover equipment;

• d) include an overview of equipment requirements and availability to allow

installation of a capping

• stack, including an adapter to enable connection of the capping stack;

• e) consider additional well load cases resulting from a capping operation

PTIL/PSA

Regulation and standards

• Permanent plugging and abandonment of wells

- Exploration wells not to be temporarily abandoned for more than 2 years

- Production wells not to be temporarily abandoned for more that 3 years

- Temporarily abandoned wells will also include wells that are shut in

- Two qualified barriers for temporarily abandonment of production wells with

no completion string installed

- Robust well design - casing shoe to be set above hydrocarbon bearing

zones

PTIL/PSA

Relevant NORSOK and Norwegian Oil

and Gas Guidelines

• Standard Norge / NORSOK D001 - Drilling Facilities, rev 3

December 2012 :

• http://www.standard.no/en/sectors/energi-og-

klima/petroleum/norsok-standard-categories/d-drilling/d-0012/

• D002 - Well intervention, rev. 2 june 2013 :

• http://www.standard.no/en/sectors/energi-og-

klima/petroleum/norsok-standard-categories/d-drilling/d-0021/

• D007 - Well testing, rev 2, september 2013 :

• http://www.standard.no/en/sectors/energi-og-

klima/petroleum/norsok-standard-categories/d-drilling/d-0071/

• D010 - Well integrity in drilling and well operations, Rev. 4,

June 2013 :

• http://www.standard.no/en/sectors/energi-og-

klima/petroleum/norsok-standard-categories/d-drilling/d-0104

9

HSE – drilling workshop in Accra – nov 2012

PTIL/PSA

Relevant NORSOK and Norwegian Oil

and Gas Guidelines

• NORSOK Z013 – Risk Assessment, Rev. 3, Oct. 2010 (see chapter 7.5.7 Blow out and well releases and Annex A - risk acceptance criteria)

• http://www.standard.no/en/sectors/energi-og-klima/petroleum/norsok-standard-categories/z-risk-analyses/z-0132

• Norwegian Oil and gas – Guideline 117 – Well integrity:

• http://www.norskoljeoggass.no/no/Publikasjoner/Retningslinjer/Boring/117-Recommended-guidelines-for-Well-Integrity/

• Norwegian Oil and gas GL 135 – Classification and categorization of well control and well integrity incidents:

• http://www.norskoljeoggass.no/no/Publikasjoner/Retningslinjer/Boring/135-Recommended-guidelines-for-classification-and-categorisation-of-well-control-incidents/

PTIL/PSA

Wells drilled 1996-2013

11

Type of well

Type of drillingunit

expl

prod

MODU

fixed

PTIL/PSA

Well Control Incidents 1996-2013

12

PTIL/PSA

Well control incidents / 100 wells

13

PTIL/PSA

- testing of BOP ram elements,

- production safety (+tree) valves

- and downhole safety valves

28/04/2014

14

Tabell 14 Andel feil for isolering med BOP, flyttbare innretninger

Tabell 1 Andel feil for isolering med BOP, flyttbare innretninger

Isolering av BOP 2011 2012 2013

Antall tester 1293 1124 2506

Antall feil 24 20 20

Antall BOP enheter 65 46 66

Andel feil 0,019 0,018 0,008

• Operators, drilling contractors and service providers areinvolved in collecting data

• Log standard function- and pressure tests of barrierelements.

• Relatively high variation in the reports • Process define the criteria to yearly trend data (RNNP)

PTIL/PSA

Regulatory requirements to P&A

• The wells are regarded as installations and not only technical requirements for P&A are valid

• The Act relating to petroleum activities states that the Ministry shall make a decision relating to disposal based on “technical, safety, environmental an economic aspects as well as to consideration for other users of the sea”

• All wells shall be secured before they are abandoned so that well integrity is safeguarded during the time they are abandoned (AR § 88)

• When a well is temporarily or permanently abandoned, the barriers shall be designed such that they take into account well integrity for the longest period of time the well is expected to be abandoned.(FR §48)

• Norsok D-010 Standard giving specific guidelines for performing the P&A work

15

PTIL/PSA

Overall - production wells

PTIL/PSA

Well integrity – NCS 2008-2013

28/04/2014

17

%

PTIL/PSA

Questions?

http://www.ptil.no/summary-

report-2012/category912.html