南海深水区水下溢油三维可视化模拟系统研发与应用

针对南海油气田勘探开发溢油污染防治需求,开发了国内首套深水区水下溢油三维可视化模拟系统,由三维海流预报模型、深水溢油模型、三维可视化仿真系统和数据库组成。海流预报模型基于ROMS模式,通过考虑波致混合影响,并利用最优插值技术同化卫星测高资料和嵌套技术,保障了预报结果的准确性。深水溢油模型由羽流模型和对流扩散模型组成,考虑了卷吸、油气分离、溶解、水合物生成、漂移、扩散等复杂过程。系统能够预测深水区水下油气泄漏后行为和归宿过程,提供油、气、天然气水合物粒子的大小、分布、移动速度和漂移轨迹、扩散面积、水体溢油残存量、水面溢油量等三维可视化动态模拟结果。目前系统已经在油气田勘探开发中得到应用,为南海深水溢油应急提供了重要支撑。

Developments and Applications of Underwater Oil Spill 3D Visualization System in the South China Sea Deepwater Area

In view of requirements of oil spill pollution control in the South China Sea oil and gas field exploration and development, the domestic first set of underwater oil spill 3D visualization system has been built, which consists of 3D current forecast model, deepwater oil spill model, 3D visualization simulation system and database. The current forecast model based on the ROMS guarantee the accuracy of the forecast results by considering the wave mixing effect and by using the optimal interpolation technology assimilation satellite altimeter data and nested technology. The deepwater oil spill model is composed of plume model and convection diffusion model, considering the entrainment, oil and gas separation, dissolution, hydrate formation, drift and diffusion process. The system can predict the behavior and fate of underwater oil and gas leak process, providing size, distribution, speed and trajectory of oil, gas and hydrate particle, the diffusion area, the oil residual in water column and on the surface etc. Now the system has been applied in the oil and gas field exploration and development, providing an important support for deepwater oil spill response in the South China Sea.