Comparison of flow deviation technologies and hydrodynamic enhanced oil recovery methods

UDK: 622.276.1/.4
DOI: 10.24887/0028-2448-2021-4-67-70
Key words: field, flow deviation technologies, watercut, reservoir, production rate, producer, injector
Authors: A.N. Ivanov (Vietsovpetro JV, the Socialist Republic Vietnam, Vung Tau), M.M. Veliev (Vietsovpetro JV, the Socialist Republic Vietnam, Vung Tau), I.V. Vladimirov (Ufa State Petroleum Technological University, RF, Ufa), E.A. Udalova (Ufa State Petroleum Technological University, RF, Ufa), E.M. Veliev (Oktyabrsky Branch of Ufa State Petroleum Technological University, RF, Oktyabrsky)

It is well known, that injection water breakthrough by highly conductive channels leads to rapid watercut of producers. Herewith, the effectiveness of reserves recovery greatly decreases, even though the production from the initial recoverable reserves does not exceed 40-50%. This means that the most oil in place resides beyond the development zone. To correct the occurred situation and improve the efficiency of existing development system, the flow deviation technologies (FDT) are applied. Such technology allows limiting the injection water filtering through flooded pools and forward it to undeveloped oil saturated zones. The experience in applying FDT and watered formations selective shut-off is significant. However, the existing information on implementing the FDT in various geological conditions demonstrates the uncertainty in the technology efficiency. As some researchers mention, the technological effect from applying the flow deviation technology may be positive, negative and neutral. It is highlighted, that some target areas showed no response in producers after the technology implementation. Other areas showed steady decrease of watercut and increase in oil production. There are also reports indicating that FDT implementation resulted in a decrease of oil production and increase of watercut. The paper covers the peculiarities of applying the flow deviation technology (FDT) on modelled oil saturated reservoir and compares the effect of FDT with hydrodynamic effect (changing the injector operation mode). The main objective is to identify the conditions for effective implementation of the technologies.

References

1. Gazizov A.A., Uvelichenie nefteotdachi neodnorodnykh plastov na pozdney stadii razrabotki (Enhanced oil recovery of heterogeneous reservoirs at a late stage of field development), Moscow: Nedra-Biznestsentr Publ., 2002, 639 p.

2. Muslimov R.Kh., Sovremennye metody upravleniya razrabotkoy neftyanykh mestorozhdeniy s primeneniem zavodneniya (Modern methods of development of oil fields with the use the waterflooding), Kazan: Publ. of Kazan University, 2003, 596 p.

3. Grigorashchenko G.I., Zaytsev Yu.V., Kukin V.V. et al., Primenenie polimerov v dobyche nefti (The use of polymers in oil recovery), Moscow: Nedra Publ., 1978, 213 p.

4. Astakhova A.N., Vybor uchastkov i obosnovanie primeneniya potokootklonyayushchikh tekhnologiy pri izvlechenii nefti iz neodnorodnykh kollektorov (Selection of sites and justification of the use of flow diversion technologies when extracting oil from heterogeneous reservoirs): thesis of candidate of technical science, Ufa, 2004.

5. Vladimirov I.V., Al'mukhametova E.M., Abilkhairov D.T., Nasibullina A.A., Features of application flowing technologies in conditionally homogeneous on permeability of oil-exhausted collectors (In Russ.), Neftegazovoe delo, 2017, V. 15, no. 3, pp. 14–21.

6. Vladimirov I.V., Imperfection of the current development system as the main factor in the formation of stagnant areas with oil reserves (In Russ.), Neftegazovoe delo, 2005, no. 4.

It is well known, that injection water breakthrough by highly conductive channels leads to rapid watercut of producers. Herewith, the effectiveness of reserves recovery greatly decreases, even though the production from the initial recoverable reserves does not exceed 40-50%. This means that the most oil in place resides beyond the development zone. To correct the occurred situation and improve the efficiency of existing development system, the flow deviation technologies (FDT) are applied. Such technology allows limiting the injection water filtering through flooded pools and forward it to undeveloped oil saturated zones. The experience in applying FDT and watered formations selective shut-off is significant. However, the existing information on implementing the FDT in various geological conditions demonstrates the uncertainty in the technology efficiency. As some researchers mention, the technological effect from applying the flow deviation technology may be positive, negative and neutral. It is highlighted, that some target areas showed no response in producers after the technology implementation. Other areas showed steady decrease of watercut and increase in oil production. There are also reports indicating that FDT implementation resulted in a decrease of oil production and increase of watercut. The paper covers the peculiarities of applying the flow deviation technology (FDT) on modelled oil saturated reservoir and compares the effect of FDT with hydrodynamic effect (changing the injector operation mode). The main objective is to identify the conditions for effective implementation of the technologies.

References

1. Gazizov A.A., Uvelichenie nefteotdachi neodnorodnykh plastov na pozdney stadii razrabotki (Enhanced oil recovery of heterogeneous reservoirs at a late stage of field development), Moscow: Nedra-Biznestsentr Publ., 2002, 639 p.

2. Muslimov R.Kh., Sovremennye metody upravleniya razrabotkoy neftyanykh mestorozhdeniy s primeneniem zavodneniya (Modern methods of development of oil fields with the use the waterflooding), Kazan: Publ. of Kazan University, 2003, 596 p.

3. Grigorashchenko G.I., Zaytsev Yu.V., Kukin V.V. et al., Primenenie polimerov v dobyche nefti (The use of polymers in oil recovery), Moscow: Nedra Publ., 1978, 213 p.

4. Astakhova A.N., Vybor uchastkov i obosnovanie primeneniya potokootklonyayushchikh tekhnologiy pri izvlechenii nefti iz neodnorodnykh kollektorov (Selection of sites and justification of the use of flow diversion technologies when extracting oil from heterogeneous reservoirs): thesis of candidate of technical science, Ufa, 2004.

5. Vladimirov I.V., Al'mukhametova E.M., Abilkhairov D.T., Nasibullina A.A., Features of application flowing technologies in conditionally homogeneous on permeability of oil-exhausted collectors (In Russ.), Neftegazovoe delo, 2017, V. 15, no. 3, pp. 14–21.

6. Vladimirov I.V., Imperfection of the current development system as the main factor in the formation of stagnant areas with oil reserves (In Russ.), Neftegazovoe delo, 2005, no. 4.


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