Prediction and assessment of offshore fire resulting from subsea gas release

doi:10.16265/j.cnki.issn1003-3033.2019.12.019

Abstract

Abstract: To assess the offshore fire consequence arisen from subsea gas release, the fire consequence prediction and assessment model was established considering the fire scenario caused by the shallow gas blowout in upwind of an offshore drilling platform. The evolution process of fire scenario under wind load was simulated and analyzed. The spatial and temporal distribution characteristics of high temperature and heat radiation flux generated during fire were predicted. The fire impact on the steel structure of offshore drilling platform and the safety of operators was assessed. The results show that offshore gas fire reaches the steady state at 40 s under the action of wind load, that the steady-state flame nearly covers the whole upper part of offshore platform and the maximum height of flame is about 96 m, that the whole offshore platform is affected by the high temperature of fire and heat radiation, the maximum temperature and radiation intensity on offshore drilling platform are 1 500 ℃ and 539 kW/m² respectively, and that the continuous high temperature and thermal radiation can cause the fracture or collapse of platform steel structure and the serious injury of personnel.

Key words: subsea gas release, offshore fire, offshore drilling platform, numerical simulation, consequence assessment

CLC Number:

X937

LI Xinhong, HAN Ziyue, CHEN Guoming. Prediction and assessment of offshore fire resulting from subsea gas release[J]. China Safety Science Journal, 2019, 29(12): 117-122.

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