Technology of absorption prevention during workover in conditions of low reservoir pressure

Authors: V.N. Gusakov, N.N. Kraevskiy, A.F. Khakimov (RN-UfaNIPIneft LLC, RF, Ufa), A.Yu. Tropin, A.V. Sahan (RN-Perneftegas LLC, Gubkinskiy)
E-mail: KraevskyNN@ufanipi.ru
Key words: hydrophobic emulsion-suspension blocking compound.

Carrying out workover at low reservoir pressures associated with a number of complications: the absorption of killing fluid, gas shows in the wellhead, loss of circulation. These effects reduce the quality of workover, pose risks to working conditions of staff, lead to a significant increase in the time of well repair and output it on mode.The article describes technology of the workover at low reservoir pressure  developed by RN-UfaNIPIneft LLC specialists. Setting the block-pack of blocking hydrophobic liquid allows a flushing of bottom of the well and gets a steady circulation at absorbing wells. 

References
1. Zdol'nik S.E., Latypov A.R., Gusakov V.N. et al., Neftyanoe khozyaystvo – Oil
Industry, 2007, no. 11, pp. 62-65.
2. Akimov O.V., Zdol'nik S.E., Khudyakov D.L. et al., Neftyanoe khozyaystvo –
Oil Industry, 2010, no. 2, pp. 92-95.
3. Pop G.S., Bacherikov A.V., Glushenie skvazhin s predvaritel'nym
blokirovaniem produktivnykh plastov dispersnymi sistemami (Well killing with
preliminary blocking of productive formations using disperse systems), Moscow: Publ. of VNIIEgazprom, 1992, 30 p.
4. Patent no. 2039075 RF, MKI6 S 09 K 7/06, Reagent for invert emulsion solutions, Inventors: Pop G.S., Bacherikov A.V., Nagirnyak I.P. et al.
5. Lezov G.O., Yashin V.I., Ismagilov T.A. et al., Neftyanoe khozyaystvo – Oil Industry, 1994, no. 2, pp. 48-51.
6. Kulikov A.N., Ismagilov T.A., Telin A.G., Khakimov A.M., Bashkirskiy khimicheskiy zhurnal, 2001, V. 8, no. 3, pp. 73-75.
7. Patent no. 2313558 RF C1 S 09K 8/44 (2006.01), Composition for leveling injectivity profile of injection wells and selective water shutoff in production
wells, Inventors: Telin A.G., Ismagilov T.A., Singizova V.Kh. et al.
8. SPE 57568, Svoboda C.F., Optimizing High-Temperature Kill Pill: The Asgard
Experience. 
E-mail: KraevskyNN@ufanipi.ru
Key words: hydrophobic emulsion-suspension blocking compound.

Carrying out workover at low reservoir pressures associated with a number of complications: the absorption of killing fluid, gas shows in the wellhead, loss of circulation. These effects reduce the quality of workover, pose risks to working conditions of staff, lead to a significant increase in the time of well repair and output it on mode.The article describes technology of the workover at low reservoir pressure  developed by RN-UfaNIPIneft LLC specialists. Setting the block-pack of blocking hydrophobic liquid allows a flushing of bottom of the well and gets a steady circulation at absorbing wells. 

References
1. Zdol'nik S.E., Latypov A.R., Gusakov V.N. et al., Neftyanoe khozyaystvo – Oil
Industry, 2007, no. 11, pp. 62-65.
2. Akimov O.V., Zdol'nik S.E., Khudyakov D.L. et al., Neftyanoe khozyaystvo –
Oil Industry, 2010, no. 2, pp. 92-95.
3. Pop G.S., Bacherikov A.V., Glushenie skvazhin s predvaritel'nym
blokirovaniem produktivnykh plastov dispersnymi sistemami (Well killing with
preliminary blocking of productive formations using disperse systems), Moscow: Publ. of VNIIEgazprom, 1992, 30 p.
4. Patent no. 2039075 RF, MKI6 S 09 K 7/06, Reagent for invert emulsion solutions, Inventors: Pop G.S., Bacherikov A.V., Nagirnyak I.P. et al.
5. Lezov G.O., Yashin V.I., Ismagilov T.A. et al., Neftyanoe khozyaystvo – Oil Industry, 1994, no. 2, pp. 48-51.
6. Kulikov A.N., Ismagilov T.A., Telin A.G., Khakimov A.M., Bashkirskiy khimicheskiy zhurnal, 2001, V. 8, no. 3, pp. 73-75.
7. Patent no. 2313558 RF C1 S 09K 8/44 (2006.01), Composition for leveling injectivity profile of injection wells and selective water shutoff in production
wells, Inventors: Telin A.G., Ismagilov T.A., Singizova V.Kh. et al.
8. SPE 57568, Svoboda C.F., Optimizing High-Temperature Kill Pill: The Asgard
Experience. 


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