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Integrated approach to well acidizing design on R.Trebs oil field (Timan-Pechora Basin)

Authors: А.Е. Folomeev, S.A. Vakhrushev, A.R. Sharifullin (BashNIPIneft LLC, RF, Ufa), L.E. Lenсhenkova (Ufa State Petroleum Technical University, RF, Ufa), R.M. Nabiullin, A.I. Fedorov (Bashneft-Polus LLC, RF, Ufa)

Key words: acid treatment, carbonate, acid composition, math modeling of the acid treatment process, wormhole, well stimulation.

Integrated approach for development of acid treatment designs for wells of R. Trebs oilfield is considered. Optimal acid blends were selected for the target high temperature carbonate reservoirs. Based on the wormhole growth model the acid treatment model was developed. The model was calibrated and adapted for the given field conditions using results of core flow tests.

References
1. Pfeiffer J.Ph., Saal R.N. J. Phys. Chem, 1940, no 44, p. 139.
2. Kharisov R.Ya., Folomeev A.E., Sharifullin A.R. et al., Integrated approach to
acid treatment optimization in carbonate reservoirs, Energy Fuels, 2012, V. 26,
pp. 2621–2630.
3. Fredd С.N., Fogler H.S.,Optimum conditions for wormhole formation in carbonate porous media: Influence of transport and reaction, SPE Journal, September 1999, no. 3, pp. 196–205.
4. Fredd С.N., Fogler H.S., Influence of transport and reaction on wormhole
formation in porous media, AlChE Journal, September 1998, no. 9, pp.
1933–1949.
5. Hoefner M.L., Fogler H.S., Pore evolution and channel formation during flow
and reaction in porous media, AIChE J., 1988, no. l, pp. 45–54.
6. Buijse M., Glasbergen G., A semiempirical model to calculate wormhole growth in carbonate acidizing, SPE 96892, 2008. 

Key words: acid treatment, carbonate, acid composition, math modeling of the acid treatment process, wormhole, well stimulation.

Integrated approach for development of acid treatment designs for wells of R. Trebs oilfield is considered. Optimal acid blends were selected for the target high temperature carbonate reservoirs. Based on the wormhole growth model the acid treatment model was developed. The model was calibrated and adapted for the given field conditions using results of core flow tests.

References
1. Pfeiffer J.Ph., Saal R.N. J. Phys. Chem, 1940, no 44, p. 139.
2. Kharisov R.Ya., Folomeev A.E., Sharifullin A.R. et al., Integrated approach to
acid treatment optimization in carbonate reservoirs, Energy Fuels, 2012, V. 26,
pp. 2621–2630.
3. Fredd С.N., Fogler H.S.,Optimum conditions for wormhole formation in carbonate porous media: Influence of transport and reaction, SPE Journal, September 1999, no. 3, pp. 196–205.
4. Fredd С.N., Fogler H.S., Influence of transport and reaction on wormhole
formation in porous media, AlChE Journal, September 1998, no. 9, pp.
1933–1949.
5. Hoefner M.L., Fogler H.S., Pore evolution and channel formation during flow
and reaction in porous media, AIChE J., 1988, no. l, pp. 45–54.
6. Buijse M., Glasbergen G., A semiempirical model to calculate wormhole growth in carbonate acidizing, SPE 96892, 2008. 


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