Fundamental and Specific Marine Geohazard Risk Assessment Categorisation

作者：Andrew W. Hill, Gareth A. Wood, Craig Scherschel · 发表于：Offshore Technology Conference · 年份：2013 · DOI：10.4043/24211-ms · 被引用次数：2 · 研究领域：Marine and Offshore Engineering Studies、Offshore Engineering and Technologies、Reservoir Engineering and Simulation Methods

Abstract Until around 1990 the main marine geohazard risk addressed solely from geophysical data was the presence of shallow gas. Presence had been described using a number of non-standard approaches for its potential presence - distinct from the actual risk it presented to operations. In the 1992 UKOOA Guidelines for the delivery of marine rig site surveys a standardised nomenclature was suggested that was largely taken up as a standard by the industry. Ironically, at exactly this point in time, as the industry had begun to move off the shelf and into deep water a number of other issues had started to present themselves: shallow water flow, chemosynthetic communities, hydrates etc. for which the industry has yet to publish a set of standard guide points on the risk of presence. In contrast with shelf settings where the risks to operations were generally around shallow gas, anchoring and footing assessment and clearance, the industry is now faced with complex slope and deep-water settings where the sources of risk can be multiple, over printed, and inter-related. In such settings early effort in the exploration and production cycle is required to ensure appropriate data are gathered and assessments delivered in proper time for drilling and facilities engineers to either avoid the presence of hazards identified or properly mitigate their presence through appropriate engineering design. This paper will outline a suggested methodology both to assess fundamental geohazard complex...