基于双系统数值理论的深海油气田段塞流捕集器创新设计

Innovative Design of Slug Catcher in Deep-sea Oil and Gas Field Based on Two-system Numerical Theory

海上油气输送大多采用混输方式,段塞流为常见的流型,严重段塞流会对下游的生产设备产生较大的冲击。对墨西哥湾深海油气田开采过程进行数值模拟分析,采用OLGA软件对海底立管底部的段塞流进行动态的数值模拟,观察立管压力、入口压力以及持液率等影响因素,提出调节节流阀开度、调节立管底部注气量的双系统抑制段塞流方案,并根据模拟结果对段塞流捕集器的尺寸进行设计。

The offshore oil and gas transportation mainly adopts the mixed transport mode, the slug flow is a common flow type, and the serious slug will have a bigger impact on the downstream production equipments. In this paper, numerical simulation analysis on the production process of deepwater oil and gas field in the gulf of Mexico was carried out, and then dynamic numerical simulation of slug flow at the bottom of the submarine riser was carried out with OLGA software, the influence factors of the stand pipe pressure, inlet pressure and the liquid holdup were investigated, dual system slug flow control scheme including adjusting the throttle opening and adjusting gas injection rate at the bottom of the riser was put forward, and the slug catcher was designed according to above simulated results.