关键词: 一体化装置, 天然气, 集气, 橇装, 功能

Abstract: Integrated natural gas gathering unit is developed to solve a series of problems in surface construction of Changqing Oilfield, such as short construction time, difficulty in investment control and extensive areas under management. To develop the device, the process and operational management of digital gas gathering stations (GGS) at Sulige gas field is analyzed to integrate and optimize the functions of different process areas of a digital GGS. Then, a new three-way valve and a new knock-out drum are developed. Finally, various types of pipe, process equipment, pressure vessels, intelligent control systems and electrical equipment are integrated into a skid. The unit is used for emergency shutdown, gas flow line venting, gas-liquid separation, process switching, metering, pigging, fuel gas supply, flashing and automatic drainage. It is suitable for a non-acidic GGS with medium to low pressure and replaces a conventional non-pressurized GGS at the gas field. When applied, the unit can shorten the construction period of a GGS for more than 15 days and reduces land use by more than 30 percent as compared to a digital GGS. Meanwhile, the investment for a GGS can be lowered by more than 10 percent. The integrated unit also improves the level of skid equipment and is convenient for operation and maintenance.

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