Abstract: Integrated natural gas gathering unit was developed to solve the bottlenecks facing Changqing gas field, such as short construction time and difficult control over high investment. The procedure and operational management of digital gas-gathering station (GGS) at Sulige gas field were analyzed in research and development of the unit, integrating and optimizing functions of different process areas of the digital GGS. A new three-way valve and a knock-out drum were developed while a series of units was integrated into a skid, such as various pipes, process equipment, pressure vessels, intelligent control system and electrical devices. The unit was mainly used for gas-liquid separation, switching, flashing, automatic drainage, metering, pigging and fuel gas supply. It is suitable for a non-acidic GGS with medium to low pressure. It could replace a conventional non-pressurized GGS of a gas field. With the unit applied, the construction period of a GGS was shortened for more than 12 days and the land use was reduced by more than 35 percent as compared to a digital GGS. The engineering investment for a single GGS could be reduced by more than 1 million yuan.

Key words: integrated unit, natural gas, gas gathering, skid-mounted

摘要： 为解决长庆气田建设面临的有效建设时间短、投资控制难度大、管理区域广等问题, 研发了天然气集气 一体化集成装置。研发中对苏里格气田数字化集气站的流程和运行管理进行分析, 将数字化集气站的工艺区域的功能 进行组合优化, 研制新的三通阀及压力容器, 并将各类管件、工艺设备、压力容器、仪表智能控制系统、电气设备等 集成组合成橇。装置主要功能为气液分离、流程切换、闪蒸、自动排液、计量、清管、自用气供给, 适用于中低压、 非酸性集气站场, 能够代替气田常规非增压集气站。应用后集气站施工周期缩短12d 以上, 征地面积较数字化集气站 减少35%以上, 实现了无人值守减少了生产定员, 单座集气站可降低工程投资100 余万元。

关键词: 一体化装置; 天然气; 集气; 橇装