ISO 17776 Checklist

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Table C.2 (continued) Activity: Drilling and well completions Description: This activity includes all tasks involved in the planning, design, procurement, construction, installation and commissioning of offshore wells used for the exploitation of oil and gas resources. Hazard identification and risk assessment step Risk-reducing measures Functional requirements Examples of aspects to be considered and activities undertaken Improved drilling and/or casing programme Improved mechanical handling and drilling systems Use of less hazardous materials Fewer concurrent activities Improved well control equipment or systems Improved completion system for reducing risk during completion and working steps, such as nippling up and down of X-mas tree Better qualified and trained personnel, with specific training given before non-standard or particularly hazardous operations Improved oil-spill contingency plans and/or better oil recovery equipment Rescheduling of drilling/completion activities to avoid the possibility of severe weather conditions occurring during particularly sensitive operations Performance of general safety systems such as detection and fire-fighting systems Integrity and performance of well-control systems including choke and kill system Performance and operational limits for well test equipment and systems Particular limits on discharge in ecologically sensitive areas Mooring and station-keeping requirements, and weather limits for particular operations Limits on concurrent activities Oil-spill contingency measures Comments The identification and implementation of risk-reducing measures should be undertaken jointly by the concession holder and the rig owner/drilling contractor. Replanning the schedule to reduce the number of concurrent operations is often a very effective risk-reducing measure which may be achieved without significant cost implication. Functional requirements relating to the well integrity safety systems are particularly important and need to be reviewed at regular intervals. Levels of operational readiness are of equal importance if the safety equipment and systems are to be utilized in an effective manner. Training, exercises and drills are important in ensuring operational readiness. 34
Table C.3 — Examples of hazard identification and risk assessment considerations during the prospect evaluation and feasibility assessment phases of field development activities Activity: Field development Description: This activity includes all tasks involved in the planning, design, procurement, construction, installation and commissioning of offshore installations used for the exploitation of oil and gas resources. Subactivity: Prospect evaluation and feasibility assessment. Hazard identification and risk assessment step Identify hazards Hazards and risk assessment Screening criteria Risk-reducing measures Functional requirements Examples of aspects to be considered and activities undertaken Consider broad hazards occurring throughout life cycle Identify main hazards and effects arising from wells, produced fluids and processing, structure, export facilities, utilities and manning arrangements, environment, logistic support arrangements, etc. Identify possible hazards associated with the construction and installation of the installation and its subsequent decommissioning and disposal Experience from previous or similar projects Codes and standards, including company guidelines PHA Environmental risk assessment Company maximum tolerable risk levels for personnel, environment and assets National and international regulations for health, safety and the environment Special local constraints due to factors such as sensitivity of ecology, seismic activity Inherently safer options to be selected whenever practicable Need for and extent of offshore processing Minimize hazardous inventory on the installation Minimize offshore manning without jeopardizing HSE considerations or production regularity Consider phased field development or long-term well testing to obtain better appreciation of risks Consider new technology where clear benefits are apparent Give adequate consideration to minimizing offshore inspection and maintenance tasks and evaluate alternative maintenance philosophies High-level criteria regarding overall performance of installation (e.g. production availability target, limitations on pressures and temperatures, service life, target manning levels or frequency of visits for not normally manned installations, limiting environmental criteria such as waves, wind, etc.) High-level functional requirements for health, safety and environment protection systems to be established (e.g. maximum impairment frequency for temporary refuge) Comments Particular attention should be given to hazards that could arise due to the use of new technology or the extension of existing technology outside its previous range. The financial robustness of the development should be possible to evaluate based upon identified hazards and risk analysis. Major hazards and risks (e.g. presence of icebergs, particularly toxic reservoir, particularly sensitive ecology of region, etc.) should be highlighted to allow risk management decision-making. Rough environmental risk assessment concentrates on possible impact of development without consideration of frequency of occurrence. At this stage the screening criteria are relatively broad. 35
Page 1 and 2: Annex C (informative) Hazards ident
Page 3: Table C.2 — Examples of hazard id
Page 7 and 8: Table C.5 — Examples of hazard id
Page 15 and 16: Table C.10 (continued) Activity: Lo
Page 17 and 18: ! Corrosive substances " Biological
Page 19 and 20: Hazard number Table D.1 (continued)
Page 25 and 26: Tableau D.2 — Checklist of source
Page 27: Tableau D.2 (continued) Source a Ro

ISO 17776 Checklist

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