牙哈凝析气田天然气水合物防止技术研究

Application Research of Natural Gas Hydrate Prevention Technology in Yaha Condensate Gas Field

牙哈凝析气田是世界少有、我国仅有的整装凝析气田,为了保证凝析油的稳定开采采用循环注气保持地层压力的开发方式。由于对凝析气的深冷加工处理分离出凝析油和液化气并把干气回注以保持地层压力产出更多的凝析气和凝析油,在处理过程中会析出水,很容易产生天然气水合物,这对天然气的处理和输送都有很大的影响,因此很有必要对水合物的形成及防止措施进行研究。本文从天然气水合物的形成原因入手,对防止天然气水合物形成的技术进行研究。

Yaha condensate gas field is a complete condensate field, it＇s only in China and rare in the world. In order to ensure stable production of the condensate oil, cyclic gas injection is often carried out to maintain the reservoir pressure. During the condensate oil and gas are separated from the condensate gas by cryogenic process, and dry gas injection is carried out to maintain the reservoir pressure to produce more condensate gas and condensate oil, the processing will produce water, which is easy to produce natural gas hydrate to affect the processing and transportation of natural gas. So it is necessary to study the formation reasons of gas hydrate and its prevention measures. In the paper, the technology to prevent natural gas hydrate from formation was studied.