报告人简介：
Dr. Binbin Wang(王彬彬) obtained a B.S. from Anhui Normal University in 2004 and a M.S. from the University of Science and Technology of China in 2009. He received his Ph.D. in Civil Engineering from the University of Wisconsin in 2013. He worked as a postdoctoral scholar in the Department of Civil Engineering at Texas A&M University during 2013-2016, and was appointed as a lecturer from 2015. In 2016, he joined the College of Geosciences at Texas A&M University as an Assistant Research Scientist.
Dr. Wang has participated research in projects funded by the U.S. National Science Foundation, the U.S. Department of Defense, and the Gulf of Mexico Research Initiative. He is currently a Co-PI of a project funded by the U.S. Department of Energy. Dr. Wang has authored 18 journal articles and 1 book chapter. He has presented his research more than 30 times in conferences, seminars, workshops around the world.
报告摘要：
The Deepwater Horizon blowout is one of the largest oil spill in the world and released over 780,000 m3 oil in the ocean, spanning 83 days. Our understanding of behavior of petroleum hydrocarbon fluids in deep-sea environment has been limited by very few field observations and simulated laboratory experiments. Modeling, on the other hands, provides valuable additional information, which must be validated to the observed data.
This presentation focuses on in situ observations of natural seeps as surrogates for the behaviors of hydrocarbon bubbles in subsea blowout. The observations on the seafloor include: (1) the quantitative imaging of bubbles at the seep source that provide flow rate of gases, bubble size distribution, bubble rise velocity, and morphological information of deep-sea bubbles; (2) direct bubble sampling that providing the composition of the bubbles; (3) water sampling that provides hydrocarbon concentration inside and outside of the seep plume. In addition, water column data of bubble signature was obtained by tracking seep plume using multi-beam sonars and sampling. The parameters of bubbles at the source and those in the water column lead to comprehensive understanding of the bubble behavior during the ascent through hundreds of meters in the ocean.
A dissolution model was developed to illustrate the behavior of the seep bubbles, and was validated to the observed data. The model includes new features: (1) formation and dissolution of gas hydrate in deep sea environment; (2) sorting and spreading of the bubbles under ocean current and turbulence. Together, observation and modeling reveal the hydrodynamics and thermodynamics during the fate of the hydrocarbon bubbles in deep-sea environment. |
