The tertiary oil production method ( EOR, Enhanced oil recovery ; Oil recovery methods, Oil recovery methods; the outdated term Tertiary oil recovery [1] ) is one of the oil production methods that increases the productivity of oil wells . It is carried out while artificially maintaining formation energy or artificially changing the physicochemical properties of oil.
Such production leads to an intensification of oil inflow and an increase in oil recovery ( oil recovery ratio) of the field to 30–60%, compared with 20–40% achieved as a result of using primary or secondary production methods. [2] [3]
Primary methods use only the natural energy of the formation; they achieve a recovery factor of not more than 20-30%. Secondary methods are associated with maintaining in-situ energy by injecting water and natural gas into the reservoir. They reach typical recovery factors of not more than 30–50%. [1] [4]
Enhanced oil recovery in tertiary methods is achieved by injecting gas , injecting chemicals , using the thermal method to increase oil recovery by cyclically injecting steam into the oil reservoir or creating in-situ combustion.
Content
Classification of enhanced oil recovery methods
According to the type of working agents, the classification of known methods of enhanced oil recovery is as follows:
- Thermal methods ( OGV and others);
- Gas methods (e.g. CO 2 -EOR);
- Physical methods ( IRP and others);
- Chemical methods ( ECV , microbiological effects and others);
- Hydrodynamic methods ;
- Flow diverting methods ;
- Combined methods
- Physicochemical methods ( Reagent-activation effect and others)
The most widely used (over 100 implementations) are thermal and gas (CO 2 ) methods. [5] According to the US Department of Energy, among the tertiary methods used in the USA, thermal methods account for 40% and 60% for gas. About one percent of applications were in chemical technologies (polymers, surfactants) [2] .
In the first decade of the 21st century, around 3 million barrels per day (of which 2 million were produced using thermal methods) were produced in the world due to tertiary methods (according to Aramco estimates), which accounted for about 3.5% of global oil production. [five]
Notes
- ↑ 1 2 E. Tzimas ,. Enhanced Oil Recovery using Carbon Dioxide in the European Energy System (English) : journal. - European Commission Joint Research Center, 2005. - P. 21-22 . Archived March 4, 2016. (3.2 Oil Recovery Technologies)
- ↑ 1 2 Enhanced Oil Recovery . www.doe.gov . DOE.
- ↑ Undeveloped Domestic Oil Resources Provide Foundation For Increasing US Oil Supply pdf // US Department of Energy, analysis of EOR potential. Game Changer Improvements Could Dramatically Increase Domestic Oil Resource Recovery. An analysis by Advanced Resources International, Arlington, VA, for the US Department of Energy's Office of Fossil Energy. Advanced Resources International, February 2006. (English)
- ↑ Ivan Rubanov . We are losing her. Table: Oil Production Methods , Expert No. 46 (540) (December 11, 2006). Date of treatment November 24, 2013.
- ↑ 1 2 Enhanced oil recovery: challenges & opportunities (English) 64-69. World Petroleum Council: Official Publication 2010. Date accessed August 20, 2014.
Literature
- Surguchev M.L. , Secondary and tertiary methods of increasing oil recovery - M .: Nedra, 1985. - 308 p.
Links
- IPCC Special Report on Carbon dioxide Capture and Storage . Chapter 5, Underground geological storage. 5.3.2.2 "Enhanced oil recovery" // Intergovernmental Panel on Climate Change (IPCC), 2005. (eng.)
- P. Zitha, R. Felder, D. Zornes, K. Brown, and K. Mohanty, Increasing Hydrocarbon Recovery Factors // SPE Technol. Updates (2011). (eng.)
- To the last drop , Dorokhov Yuri // Expert-Ural No. 6 (269) February 12, 2007
- Review of modern methods of enhanced oil recovery
- The use of modern methods of increasing oil recovery in Russia: it is important not to lose time // E&Y, 2013