Environmental statement - Flyndre and Cawdor - Maersk Oil

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6.4.2.1. FISH Flyndre and Cawdor Environmental Statement Section 6 Hydrocarbon Releases Several fish species have been recorded across the North Sea (e.g. annual fish landings data presented to ICES include over 200 species of fish and shellfish.). Some of the more commercially important species known to spawn in the area of the development are given in Table 3‐11. It is likely that fishing would be suspended in the vicinity of a release until monitoring could be carried out, reflecting the fact that oil in water concentrations very close to the release point could be toxic to fish and cause tainting. Modelling predicts that water column oil and surface oil will disperse, degrade and evaporate within days and weeks of the release ceasing. 6.5. SPILL PREVENTION AND CONTINGENCY PLANNING Maersk Oil’s commitments to ensuring protection of the environment are set out in the corporate HSE policy, a copy of which is provided in Appendix C. Maersk Oil’s EMS covers all aspects of Maersk Oil activities including exploration, drilling and production and will be applied to the proposed development. The activities associated with the proposed development are also covered in a project specific HS&E plan which ensures that the project is managed in such a way that all of Maersk Oil’s health, safety and environmental policies are adhered to throughout all phases of the Flyndre and Cawdor development. Particular emphasis will be paid to having a robust design, quality equipment, quality construction and operational best practices. The following provides a high level overview of proposed areas of planning and preparation that either reduce the probability of a failure of well control or reduce the consequence of a failure of well control. The wells and the recompletions are designed to Maersk Oil’s internal technical practices. During well operations, the primary well control barrier is weighted fluid and the secondary barrier is the BOP equipment. The production casing is part of the pressure containment vessel, sealed‐off in the wellhead and featuring cement isolation between the reservoir and shallower formations; The rig will have a UK Safety Case and will be class certified by a recognised certifying authority. Maersk Oil will perform assurance assessments prior to rig acceptance to confirm all critical systems such as surface BOP equipment and drilling fluid circulating and processing systems are fully certified and working as designed; The BOP stack minimum pressure rating will always be greater than the reservoir pressure; Maersk Oils control response procedures detail the action to be taken in response to a well control event and defines the roles and responsibilities for all responders to the event and details technical and operational support for different scenarios; The proposed measures will be documented in the OPEP for consideration by the authorities prior to the operation. Maersk Oil is certified to the international ISO 14001 standard, and has an externally verified Environmental Management System (EMS). The EMS governs those aspects of the environment that can be controlled, such as discharges, and establish a subsequent auditing process. Maersk Oil is party to the Offshore Pollution Liability Association Limited (OPOL) which is a voluntary oil pollution compensation scheme from offshore oil pollution incidents from exploration and production facilities. Maersk Oil is a member of the Operators Co‐Operative Emergency Services. This is the organisational framework under which oil and gas companies operating in the waters of the North Sea and adjacent waters of the North West European Continental Shelf co‐operate and share resources in the event of an emergency situation. 6 ‐ 16 D/4114/2011
Flyndre and Cawdor Environmental Statement Section 6 Hydrocarbon Releases Maersk will enter into contracts with the drilling contractor to ensure that appropriate control measures are in place and will undertake an audit of the drilling rig. In addition Maersk Oil is supported by Oil Spill Response Limited (OSRL), which is an industry, recognised expert company in the containment and management of hydrocarbons accidently released into the environment. Access to competent personnel and equipment is available at short notice for mobilization to the site of any spill to assist in the remedial containment and subsequent clean of hydrocarbons. Equipment available under contract with OSRL covers onshore and offshore containment, treatment, collection and clean‐up hardware and includes a range of approved chemical dispersants that could be deployed from vessels or aircraft as required. The readiness of the company is regularly tested via emergency response simulation which includes formal statutory oil spill response. A number of mitigation measures will be in place to minimise the impact of any major or minor hydrocarbon release associated with the development of the Flyndre and Cawdor field. 6.5.1. EMERGENCY PREPAREDNESS AND RESPONSE A summary of the reporting system for oil and chemical spills is summarised here, further details of the roles and responsibilities will be provided in the OPEP. For all accidental / unplanned discharges or spills of oil or chemicals to sea, regardless of volume the Maersk Oil Emergency Co‐ordinator (onshore) is notified. The nearest HM Coastguard station is contacted by telephone. A petroleum Operations Notice (PON 1) that provides details of the spill will be sent to the HM Coastguard station (Maritime Rescue Coordination Centre Aberdeen), DECC and JNCC. If spill exceeds one tonne within 25 nautical miles of the coast or is within an environmentally sensitive area the incident reporter is to telephone JNCC and DECC. For a spill in any area exceeding 25 tonnes the incident reporter must telephone JNCC (Figure 6‐10). Figure 6‐10 Notification pathway for oil and chemical spills The UK and Norway have the NORBRIT agreement which details counter pollution measures between the two countries, whilst similar measures are in place with European countries signatory to the Bonn Convention. The authorities for the territorial waters within which a major oil spill occurs, shall immediately notify the authorities of the other country if their territorial waters are threatened. For a spill that could enter into Norwegian waters this notification shall be transmitted between the UK D/4114/2011 6‐17
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Environmental statement - Flyndre and Cawdor - Maersk Oil

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