3) Natural gas refrigeration system
1) Process description
After dehydration and dust filtration, the natural gas enters the heat exchanger and the temperature drops to ~7 °C before entering the propane refrigeration system. The temperature drops to -33 ° C~ before entering the low-temperature separator. The gas phase return of the low-temperature separator and the heat exchanger are heated to ~ 13 °C, and the liquid phase enters the NGL tower after throttling.
2) Design parameters
Feed gas processing capacity: 70 × 104 Nm3/d
Working pressure 3.5MPaG
Inlet temperature ~7 ℃
Outlet temperature ~ - 33 ℃
4) NGL tower system
1) Process description
The hydrocarbons coming out of the low-temperature separator enter the NGL tower after decompression. The top of the tower is natural gas with heavy hydrocarbons removed, and the bottom of the tower is heavy hydrocarbons.
2) Design parameters
NGL tower working pressure 1.0MPa G
5) heavy hydrocarbon storage system
1) Process description
Product: NGL
2) Design parameters
NGL storage tank
Working pressure 1.0MPa G
Design temperature 100 ℃
Volume 50 m 3
6) Sewage storage system
1) Process description
Sewage storage.
2) Design parameters
sewage storage tank
Working pressure Normal pressure
Design temperature 80 ℃
Volume 50 m 3
In addition to the technological aspects, the recovery of light hydrocarbons from associated gas also has environmental benefits. By recovering NGL and LPG, the amount of methane and other greenhouse gases released into the atmosphere is reduced, contributing to efforts to mitigate climate change. Furthermore, maximizing the recovery of valuable components from associated gas helps in reducing waste and optimizing the use of natural resources.
In conclusion, the recovery of NGL and LPG from associated gas in oil fields is a critical process that not only adds value to the gas stream but also contributes to energy security and environmental sustainability. With the use of advanced technologies such as cryogenic processing and absorption, the industry continues to improve the efficiency and effectiveness of NGL and LPG recovery, ensuring that valuable resources are not wasted and that environmental impacts are minimized.