Based on a Lagrangian integral technique and Lagrangian particle-tracking technique,a numerical model was developed to simulate the underwater transport of oil from a deepwater spill. This model comprises two submodel...Based on a Lagrangian integral technique and Lagrangian particle-tracking technique,a numerical model was developed to simulate the underwater transport of oil from a deepwater spill. This model comprises two submodels: a plume dynamics model and an advection-diffusion model. The former is used to simulate the stages dominated by the initial jet momentum and plume buoyancy of the spilled oil,while the latter is used to simulate the stage dominated by the ambient current and turbulence. The model validity was verified through comparisons of the model predictions with experimental data from several laboratory flume experiments and a field experiment. To demonstrate the capability of the model further,it was applied to the simulation of a hypothetical oil spill occurring at the seabed of a deepwater oil/gas field in the South China Sea. The results of the simulation would be useful for contingency planning with regard to the emergency response to an underwater oil spill.展开更多
There are considerable amounts of off shore oil/gas fields in the South China Sea(SCS),and for potential oil spill events in this area,dispersants may provide a reliable large-scale response when the preferable option...There are considerable amounts of off shore oil/gas fields in the South China Sea(SCS),and for potential oil spill events in this area,dispersants may provide a reliable large-scale response when the preferable option of recapturing the oil cannot be achieved.In this paper,effect of chemical dispersants on underwater oil transport is investigated with an underwater oil spill model.Since the model is an adaption of an existing one,we first calibrate it by comparing the model result with echo-sounder data that were observed during the“DeepSpill”experiment with crude oil/LNG(liquefied natural gas)discharge.Then,with the hydrodynamic data provided by an operational forecasting system and the drilling data obtained from off shore platforms in the SCS,we apply the model to a hypothetical spill case,and examine the difference in oil distribution in water column caused by subsea dispersant application.The model results can provide valuable reference for contingency plan makers to make an efficient emergency response to potential underwater oil spill accidents in the SCS.展开更多
为分析京唐港海域发生溢油漂移扩散产生的影响,基于三向不可压缩和Reynolds值均布的Navier-Stokes方程,并服从Boussinesq假定和静水压力的假定,对整个渤海海域建立二维潮流场数值模型。以水动力为基础,根据Lagrangian“油粒子”理论对...为分析京唐港海域发生溢油漂移扩散产生的影响,基于三向不可压缩和Reynolds值均布的Navier-Stokes方程,并服从Boussinesq假定和静水压力的假定,对整个渤海海域建立二维潮流场数值模型。以水动力为基础,根据Lagrangian“油粒子”理论对粒子进行追踪,建立溢油漂移扩散预测模型,模拟不同工况下油膜在海水中的漂移扩散过程。结果表明,溢油污染对附近自然保护区、旅游休闲娱乐区、渔业养殖捕捞区及岸线均存在一定的影响,其大清河口附近渔业捕捞区的影响最大;72 h内油膜最大扩散面积出现在冬季强风涨潮时溢油,其面积为213.373 km 2。通过对油膜的运动轨迹和敏感区目标的影响进行分析预测,对在京唐港附近海域发生溢油事故采取应急措施、海洋环境影响评价等提供一定的依据和技术支持。展开更多
基金Supported by the 12th Five-Year Project of Science and Technology of China National Offshore Oil Corporation “Development of Underwater Oil Spill Numerical Simulation in Deep Water”(No.CNOOC-KJ 125 ZDXM 00 000 00 NFCY 2011-03)
文摘Based on a Lagrangian integral technique and Lagrangian particle-tracking technique,a numerical model was developed to simulate the underwater transport of oil from a deepwater spill. This model comprises two submodels: a plume dynamics model and an advection-diffusion model. The former is used to simulate the stages dominated by the initial jet momentum and plume buoyancy of the spilled oil,while the latter is used to simulate the stage dominated by the ambient current and turbulence. The model validity was verified through comparisons of the model predictions with experimental data from several laboratory flume experiments and a field experiment. To demonstrate the capability of the model further,it was applied to the simulation of a hypothetical oil spill occurring at the seabed of a deepwater oil/gas field in the South China Sea. The results of the simulation would be useful for contingency planning with regard to the emergency response to an underwater oil spill.
基金Supported by the National Natural Science Foundation of China(Nos.41806111,41790473)the Open Foundation of Key Laboratory of Marine Spill Oil Identifi cation and Damage Assessment Technology,State Oceanic Administration(No.201608)+3 种基金the National Key Research and Development Plan(No.2016YFC1402304)the NSFC Innovative Group Grant(No.41421005)the NSFC-Shandong Joint Fund for Marine Science Research Centers(No.U1606402)the High Performance Computing Center at the Institute of Oceanology,Chinese Academy of Sciences。
文摘There are considerable amounts of off shore oil/gas fields in the South China Sea(SCS),and for potential oil spill events in this area,dispersants may provide a reliable large-scale response when the preferable option of recapturing the oil cannot be achieved.In this paper,effect of chemical dispersants on underwater oil transport is investigated with an underwater oil spill model.Since the model is an adaption of an existing one,we first calibrate it by comparing the model result with echo-sounder data that were observed during the“DeepSpill”experiment with crude oil/LNG(liquefied natural gas)discharge.Then,with the hydrodynamic data provided by an operational forecasting system and the drilling data obtained from off shore platforms in the SCS,we apply the model to a hypothetical spill case,and examine the difference in oil distribution in water column caused by subsea dispersant application.The model results can provide valuable reference for contingency plan makers to make an efficient emergency response to potential underwater oil spill accidents in the SCS.
文摘为分析京唐港海域发生溢油漂移扩散产生的影响,基于三向不可压缩和Reynolds值均布的Navier-Stokes方程,并服从Boussinesq假定和静水压力的假定,对整个渤海海域建立二维潮流场数值模型。以水动力为基础,根据Lagrangian“油粒子”理论对粒子进行追踪,建立溢油漂移扩散预测模型,模拟不同工况下油膜在海水中的漂移扩散过程。结果表明,溢油污染对附近自然保护区、旅游休闲娱乐区、渔业养殖捕捞区及岸线均存在一定的影响,其大清河口附近渔业捕捞区的影响最大;72 h内油膜最大扩散面积出现在冬季强风涨潮时溢油,其面积为213.373 km 2。通过对油膜的运动轨迹和敏感区目标的影响进行分析预测,对在京唐港附近海域发生溢油事故采取应急措施、海洋环境影响评价等提供一定的依据和技术支持。
