Application Verification of Natural Gas Hydrate Micro-Experimental Study
- Ye Chen (China University of Petroleum) | Yonghai Gao (China University of Petroleum) | Guizhen Xin (China University of Petroleum) | Dongzhi Gao (China University of Petroleum) | Litao Chen (China University of Petroleum) | Baojiang Sun (China University of Petroleum)
- Document ID
- International Society of Offshore and Polar Engineers
- The 29th International Ocean and Polar Engineering Conference, 16-21 June, Honolulu, Hawaii, USA
- Publication Date
- Document Type
- Conference Paper
- 2019. International Society of Offshore and Polar Engineers
- phase transition, micro-experimental application, deepwater testing conditions, Hydrate
- 1 in the last 30 days
- 59 since 2007
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Hydrate phase transitions under different conditions, such as multi-component gases, oil-water mixture and throats sized 30μm – 60μm have been simulated by micro-experimental method. The results indicate that direct observation is effective and images contain abundant information. In addition, the hydrate-based preparation cycle is shortened, the material cost is saved and the measurement accuracy is improved. Therefore, the application feasible of micro-experimental method on hydrate investigation, especially during the testing, has been verified. providing a new reasonable choice for hydrate-based laboratory simulation, solving the safety issues during deepwater exploration and improving the operation efficiency in the future.
Natural gas hydrate is a kind of ice-like hydrocarbon clathrate, widely distributed in polar tundra, continental slopes and ocean trenches (Collett, 2000). Considering its features such as huge reserves, wide distribution and large combustion quality, natural gas hydrate attracts the attentions all over the world and becomes an important potential energy resource in the future (Kvenvolden, 2013). While natural gas hydrate always requires an existing environment of high pressure as well as low temperature, and its property of phase transition between gas-liquid-solid makes hydrate different from the traditional fossil fuels (Moridis, 2002; Zhang et al, 2011). On the basis of these characteristics, it is believed that hydrate can be large-scale applied on the power storage, desalination, CO2 capture and etc. (Xu et al, 2011; Liu et al,2013; Chen et al, 2015).
However, natural gas hydrate is a double-edged sword in the engineering. It has been found that the phase transition of hydrate can block the pipes and damage the reservoir structure, inducing a series of disasters such as blowout, wellbore instability, collapse, landslide and etc. (Tréhu et al, 2006). Therefore, it is necessary to study the corresponding phase equilibria conditions and multiphase flow in hydrate-bearing environments, for enhancing the industry utilization and avoiding the production risks.
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