Deepwater gas kick simulation with consideration of the gas hydrate phase transition

• 作 者: 王志远 孙宝江
• 机 构: School of Petroleum Engineering,China University of Petroleum (East China),
• 出 处: Journal of Hydrodynamics
• 发表日期: 2014年01期
• 关键词: hydrate drilling multiphase hydrocarbon bubble hidden governing methanol gases c

The hydrate phase transition presents new problems and challenges for the deepwater well control in the drilling processes.A simulation model is built for deepwater gas kicks with consideration of the hydrate phase transition.The model is based on the multiphase flow governing equations and the hydrate phase transition calculation equations.The influence of the hydrate phase transition on the gas kick hydraulics is investigated through numerical simulations.It is shown that the diameter of the gas bubbles can significantly influence the hydrate phase transition effect.The influence of the hydrate phase transition on the gas kick hydraulics increases with the decrease of the average gas bubble diameter.The hydrate phase transition adds a“hidden”nature for the well kick in deepwater and hinders the early detection of the gas kick.The influence of the hydrate phase transition on the gas kick hydraulics is also studied in the case when the hydrate inhibitor is added to the drilling fluid.

The hydrate phase transition presents new problems and challenges for the deepwater well control in the drilling processes. A simulation model is built for deepwater gas kicks with consideration of the hydrate phase transition. The model is based on the multiphase flow governing equations and the hydrate phase transition calculation equations. The influence of the hydrate phase transition on the gas kick hydraulics is investigated through numerical simulations. It is shown that the diameter of the gas bubbles can significantly influence the hydrate phase transition effect. The influence of the hydrate phase transition on the gas kick hydraulics increases with the decrease of the average gas bubble diameter. the hydrate phase transition adds a “hidden” nature for the well kick in deepwater and hinders the early detection of the gas kick. the influence of the hydrate phase transition on the gas kick hydraulics is also studied in the case when the hydrate inhibitor is added to the drilling fluid .