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Archive for the ‘accidents’ Category

Per Upstream:

A fire at BP’s Valhall oil platform off Norway in the southern part of the North Sea forced the UK supermajor to halt production and evacuate the facility today. 

Valhall Complex (www.mfox.nl)

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BOE’s Cheryl Anderson picked up this AP report.  Helicopter accidents continue to be a leading cause of offshore casualties.

A helicopter carrying crew from an offshore drilling rig crashed into the sea off Myanmar, killing three people on board. Eight were rescued.

The aircraft was carrying staff of the Malaysian oil company Petronas from the Yetagun offshore gas field in the Andaman Sea.

The oil field is operated by Petronas Carigali of Malaysia, PTTEP of Thailand and Japan’s Nippon Oil company. Petronas also operates a cross-border gas pipeline to transport gas from Yetagun to Thailand.

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If someone had asked me a few years ago what the highest risk offshore system was, I certainly would not have said a fully cased well in the process of being suspended. Yet that was the scenario for both of the recent mega-incidents, Montara and Macondo.

I would have instead suggested that dynamic production risers were the highest risk offshore system. The combination of relatively new technology, movement,  fatigue potential, exposure in the splash zone, and continuous hydrocarbon flow poses risks that must be carefully managed.  That is why investigations of incidents like the Visund gas leak are so important. In that regard, PSA does an excellent job and prominently posts all of their reports so that we all may benefit. I recommend that you take a look at this one.

In connection with the planned shutdown on Visund on 9 April 2011, a hydrocarbon leak occurred from well A21’s 6” flexible riser UK-18-0009. The Petroleum Safety Authority Norway (PSA) has carried out an investigation of certain aspects of the incident.

 We have identified three nonconformities within the areas of establishment and follow-up of preconditions for safe operation of dynamic risers, training and expertise and governing documentation.

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From the West Australian:

A new system to regulate the offshore gas and oil industry – a direct response to the 2009 Montara north of the Kimberley – has been approved by the Federal Parliament’s lower house.

Under the changes, the seven state and territory authorities will be replaced by a single Commonwealth body, the National Offshore Petroleum Safety and Environmental Management Authority.

It will regulate all safety issues from exploration to well decommissioning.

In the US, the jurisdictional conflicts (offshore) differ in that they typically involve multiple Federal regulators with overlapping jurisdiction and different priorities. Since most of the necessary streamlining would only involve Federal agencies, one would think that regulatory reform would be achievable, especially after a major blowout that killed eleven. Unfortunately, meaningful US reform appears to be highly unlikely.

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From Bloomberg.com:

A force majeure notice was delivered to the government of Ghana and Ghana National Petroleum Corp. after an anchor- handling accident damaged the rig, Dallas-based Kosmos said today in a statement. The Marianas was scheduled to arrive July 10 for drilling, Kosmos said.

Kosmos said it anticipates that either the Marianas or a substitute rig will be “available soon” to drill the Cedrela-1 well in the West Cape Three Points Block. Transocean, based in Vernier, Switzerland, reported yesterday it evacuated 108 of 121 workers on the rig after it took on water while preparing to leave an Eni SpA drilling site off Ghana.

The market for deep-water rigs in that part of the world is so tight that Kosmos will likely have to wait at least a month for a comparable drilling vessel, said Brian Uhlmer, an analyst at Global Hunter Securities in Houston. Moving an unused rig from the Gulf of Mexico could take about 45 days.

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  1. Will Transocean be releasing any details on yesterday’s “water ingress?” Will the results of their internal investigation ever be made public? (We are still waiting for their report on the fatal crane incident last August offshore Nigeria.)
  2. Will an independent investigation be conducted? Will the authorities in Ghana participate?
  3. Did the damage that the Marianas incurred during Hurricane Ike (2008) or Tropical Storm Ida (2009) in any way contribute to yesterday’s apparent structural failure?
  4. When will we have an international system that ensures (a) prompt, independent, and complete investigations of all significant accidents, and (b) the timely release of findings?

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Per Platts:

Deepwater driller Transocean confirmed that its semisubmersible rig Transocean Marianas operating off the coast of West Africa had taken on water early Wednesday, forcing the evacuation of some crew members.  “A water ingress was noticed onboard the Transocean Marianas during operations offshore Ghana” for Italian major Eni, Transocean spokesman Guy Cantwell said. “The rig is stable at this time. There are no injuries, and all non-essential personnel are being evacuated.” 

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Per information provided by one of our readers (see comment on the original Marianas post), the rig was in transit offshore Ghana, west of Takoradi. This report indicates that “they have got control over the list at the moment.”

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I thought this Platts Oilgram News report was interesting given PTT’s objection to Indonesia’s claim for damages from PTT’s Montara blowout:

Thai energy authorities are pointing fingers at South Korea’s Hyundai Heavy Industries for causing damage to one of its offshore pipelines that slashed natural gas supplies to the kingdom by 14%. State-controlled oil and gas company PTT is also planning to seek hefty compensation claims from Hyundai Heavy as well as from Diphaya Insurance, the Thai state-owned insurance firm, which provides coverage for the company’s works, a senior PTT executive said June 30.

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I don’t buy the argument that industry and regulators have paid too much attention to personal safety at the expense of process safety. Casualties from falls, falling objects, helicopter crashes, and other workplace activities have been persistent, and safety management programs must emphasize practices and procedures that will reduce occurrence rates.

Also, process safety has hardly been ignored. API RP 14 C has proven to be an effective safety analysis procedure for addressing undesirable events associated with each process component of a production facility.  For more complex facilities, Deepwater Operating Plans and API RP 14J, “Recommended Practice for Design and Hazard Analysis for Offshore Production Facilities, ” are good risk management supplements to RP 14C.

That said, we need better programs for sustaining the focus needed to further reduce the probability of low frequency, high consequence events.  When memories about the most recent disaster start to fade, what do we do to keep workers on edge and prevent complacency? What more can be done to prevent events with enormous consequence potential?  Some thoughts:

  1. Establish programs to remind employees about past disasters – how they happened and how they could have been prevented. How many offshore workers know the chain of events that led to the Santa Barbara blowout, Ocean Ranger sinking, Alexander Kielland capsizing, Piper Alpha fire and explosion, Ixtoc blowout, and other historic incidents? When discussing international incidents, we need to explain how our facilities or region might have been vulnerable under similar circumstances.
  2. Present information on minor incidents that could have escalated into disasters, emphasizing what could have gone wrong and why.
  3. Don’t just focus on the last disaster.  While addressing the operational and organizational issues that surfaced at Montara and Macondo, we also must assess incident data and identify activities and practices that could lead to the next disaster.
  4. Operators should not rely on the regulator to manage their operations. Reading about Montara and Macondo, one senses that the regulators were called on to referee internal company disputes and protect the operators and contractors from themselves.
  5. Regulators should not be making day-to-day operating decisions. Regulators should make sure that the regulations are clear and that operators have effective management procedures for adjusting programs as new information is obtained. Regimes that provide for regulator approval of each activity or adjustment promote operator complacency and are not in the best interest of safety over the long term.
  6. Service companies and contractors must challenge operators and regulators.  Operators should expect contractors to think and question, not to simply execute orders. There are impressive examples of contractors insisting on safety improvements, and being willing to forego business rather than compromise on safety.
  7. All sectors of the offshore industry should participate in standards development. Effective standards are dependent on diverse input.
  8. Industry and government leaders should promote innovation. Obvious weaknesses should be identified and industry should be challenged to propose solutions. For example, why do concerns about “false alarms” preclude automatic alarm activation (see Transocean’s Macondo report)? Data from redundant sensors can be analyzed by predictive software that is capable of quickly identifying real events. Similarly, why have advances in BOPE, including monitoring systems, been so slow? Why are BOP capabilities still poorly understood? Why are well integrity and casing pressure issues (producing wells) so common?

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