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Risk assessment, oil and gas |
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Peter Carr Consultants Ltd provide state-of-the-art risk assessment services to the oil and gas industry Our risk assessment services cover
all the phases and components of an oil and/or gas project Our risk assessments are performed by professional
engineers with solid and diversified |
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As hydrocarbon demand continues to rise, oil and gas companies are forced to explore at increased water depths in harsher environments and to handle fluids at higher pressures and temperatures. In turn, offshore structures, flowlines, risers and pipelines are increasing in complexity. Risk assessment plays an important part in achieving optimized solutions. Risk assessment can be qualitative or quantitative. In the latter case, the assessment process is usually called risk analysis or quantitative risk analysis (QRA). In oil and gas projects, risks are usually quantified if sufficient information exists to do so. A quantified risk assessment involves the following key steps:
A qualitative risk assessment follows the same key steps but frequencies, consequences and risks are expressed using ordinary language rather than mathematical measures. In a complex project, the risk assessment cycle from HAZID through to recommendations is performed repeatedly until it is demonstrated that all hazards have been identified and all risks reduced to as low as is reasonably practicable. In design projects, it is vital that risk assessment proceeds in step with the design activities. At the feasibility or concept selection stage, the risk assessment should be high-level. By applying risk assessment at this early stage, alternative concepts can be ranked in terms of safety, operability and cost, so that the optimum solution can be selected. In the later design phases, the risk assessment is developed in line with design progression to provide constant feedback to the design so that every aspect can be optimized. Risk assessment techniques are applied not only to risks to people and the environment but also to business risks. Risk assessment is particularly helpful when there is a balance to be struck between conflicting objectives, i.e. when the right solution is not immediately obvious. As well as assisting the decision-making process, risk assessment can also help demonstrate to third parties that correct decisions have been made. Our risk assessment tools include a comprehensive suite of in-house models for calculating event frequencies and consequences for all hazards normally encountered in the oil and gas industries. These hazards include material and construction defects, environmental loading effects (including earthquake and fault movement), third party interferences, operating errors, fire and explosion etc. For hydrocarbon leaks, we can perform modelling of release rates, dispersion, toxicity, fires and explosions. We can analyse the effect of fire and explosion upon structures and the consequences for personnel. We can also model evacuation processes and systems. We use models programmed variously in Mathcad, Mathematica, Delphi and C++. General purpose analytical approaches include:
We are also experienced in providing support to designers and constructers through team-based activities such as HAZID, technical review and HAZOP as well as through ad hoc safety studies and the provision of day-to-day advice. We can supply Chairman and Secretary for team-based studies. |
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