This article includes alist of references,related reading,orexternal links,but its sources remain unclear because it lacksinline citations.(November 2024) |
Gas reinjectionis the reinjection ofnatural gasinto an undergroundreservoir,typically one already containing both natural gas andcrude oil,in order to increase the pressure within the reservoir and thus induce the flow of crude oil or else sequester gas that cannot be exported. This is not to be confused withgas lift,where gas is injected into theannulusof the well rather than the reservoir. After the crude has been pumped out, the natural gas is once again recovered. Since many of the wells found around the world contain heavy crude, this process increases their production. The basic difference betweenlight crudeandheavy crudeis its viscosity and pumpability—the lighter the crude the easier it is to pump. Recovery ofhydrocarbonsin a well is generally limited to 50% (heavy crudes) and 75–80% (light crudes).Recyclingof natural gas or other inert gases causes the pressure to rise in the well, thus causing more gas molecules to dissolve in the oil lowering its viscosity and thereby increasing the well's output. Air is not suitable forrepressuringwells because it tends to cause deterioration of the oil, thus carbon dioxide or natural gas is used to repressure the well. The term 'gas-reinjection' is also sometimes referred to as repressuring—the term being used only to imply that the pressure inside the well is being increased to aid recovery.
Injection or reinjection of carbon dioxide also takes place in order to reduce the emission of CO2into the atmosphere, a form ofcarbon sequestration.This has been proposed as a method tocombat climate change,allowing mass storage of CO2over a geological timescale. Reinjection of carbon dioxide in the Norwegian Sleipner gas field saves the operators 1 million Norwegian Kroners per day in national carbon taxes.
External links
edit- GAS RE-INJECTION. Total experience,Elisabeth PROUST, 2006
- How Does Gas Injection Work?// RIGZONE
- Kamila, Zahratul; Kaya, Eylem; Zarrouk, Sadiq J. (January 2021). "Reinjection in geothermal fields: An updated worldwide review 2020".Geothermics.89:101970.Bibcode:2021Geoth..8901970K.doi:10.1016/j.geothermics.2020.101970.
- Wong, S.; Keith, D.; Wichert, E.; Gunter, B.; McCann, T. (2003). "Economics of Acid Gas ReinjectionAn Innovative CO2 Storage Opportunity".Greenhouse Gas Control Technologies - 6th International Conference.pp. 1661–1664.doi:10.1016/B978-008044276-1/50270-1.ISBN978-0-08-044276-1.
- Luo, Erhui; Wang, Jianjun; Song, Heng; Wang, Lei (January 2024). "A rapid optimization methodology of produced gas reinjection EOR in carbonate reservoirs".Fuel.355:129507.Bibcode:2024Fuel..35529507L.doi:10.1016/j.fuel.2023.129507.
- Hanssen, J. E. (1988). "Nitrogen as a Low-Cost Replacement for Natural Gas Reinjection Offshore".All Days.doi:10.2118/17709-MS.
- Xiangliang, Li (2 June 2016)."Feasibility of produced gas reinjection during CO2 flooding and its influence on displacement efficiency".Petroleum Geology and Recovery Efficiency.23(3): 72–76.
