One of the priorities in oil and gas industry is determining quality of chemical agents used in well drilling, completion, operation, workover, production stimulation, and enhanced oil recovery processes. Use of chemicals in oil production processes is a global trend and an integral part of the present-day strategy of improving oil and gas field development efficiency. Advanced use of chemicals for oil production stimulation is now focused on synthesis and development of composite chemical systems. In addition to conventional inorganic acids, more complex components are used with increasing frequency, such as organic acids, chelate compounds, as well as a series of chemical agents to control acid-rock reaction kinetics and to selectively react with specific lithological components of reservoir rock and to change (control) structure and viscosity parameters. Considering these domestic and global trends, the importance of research in the field of testing and ranking composite acid systems based on specific geologic and physical field conditions is beyond dispute. Modern innovative approaches stipulate the necessity and importance of digitizing and ranking physical and chemical properties of chemical products in order to effectively and scientifically select chemical agents for targeted and efficient production stimulation operations.
The paper discusses the procedure of identifying the most viable acid system formulations for various productive formations based on rank differentiation of formulations according to their physical and chemical parameters.
1. Brian C., Metcalf S., Stimulation of oil production in the San Andres area thanks to the use of a weak acid (In Russ.), Neftegazovye tekhnologii, 2009, no. 12, pp. 21–24.
2. Fjelde I., Sulfate in rock samples from carbonate reservoirs, Proceedings of International Symposium of the Society of Core Analysts held in Abu Dhabi, 12 p.
3. Gomari K.A.R, Karoussi O., Hamouda A.A., Mechanistic study of interaction between water and carbonate rocks for enhancing oil recovery, SPE-99628-MS, 2006, DOI: https://doi.org/10.2118/99628-MS.
4. Høgnesen E.J., Strand S, Austad T., Waterflooding of preferential oil-wet carbonates: Oil recovery related to reservoir temperature and brine composition, Proceedings of 14th Europec Biennial Conference held in Madrid, Spain, 13-16 June 2006, DOI: https://doi.org/10.2118/94166-MS.
5. Lungwitz B., Fredd C., Brady M. et al., Diversion and cleanup studies of viscoelastic surfactant-based self-diverting acid, SPE-86504-PA, 2007, DOI: https://doi.org/10.2118/86504-PA
6. Manchanda R., Sharma M.M., Impact of completion design on fracture complexity in horizontal shale wells. Equilibrium Test-A method for closure pressure determination, SPE-159899-PA, 2014, DOI: https://doi.org/10.2118/159899-PA.
7. Nasr-El-Din H.A., Van Domelen M., Welton T., Sierra L., Optimization of surfactant-based fluids for acid diversion, SPE-107687-MS, 2007, DOI: https://doi.org/10.2118/107687-MS
8. Webb K.J., Black C.J.J., Tjetland G., A laboratory study investigating methods for improving oil recovery in carbonates, Proceedings of International Petroleum Technology Conference in Doha, Qatar, 21–23 November 2005, DOI: https://doi.org/10.2523/IPTC-10506-MS.
9. Xie Kh., Weiss W.W., Tong Z., Morrow N.R., Improved oil recovery from carbonate reservoirs by chemical stimulation, SPE-89424-MS, 2004, DOI: https://doi.org/10.2118/89424-MS
10. Ibragimov N.G., Musabirov M.Kh., Yartiev A.F., Tatneft’s experience in commercialization of import-substituting well stimulation technologies (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2015, no. 8, pp. 86–89.
11. Yartiev A.F., Tufetulov A.M., Musabirov M.H., Grigoryeva L.L., Enhancement of horizontal well oil recovery by means of chemical stimulation, Asian Social Science, 2015, V. 11, no. 11, pp. 346–356.
12. Khisamov R.S., Musabirov M.Kh., Yartiev A.F., Uvelichenie produktivnosti karbonatnykh kollektorov neftyanykh mestorozhdeniy (Increase in productivity of carbonate reservoirs of oil fields), Kazan': Ikhlas Publ., 2015, 192 p.
13. Zakirov I.S., Zakharova E.F., Musabirov M.Kh., Ganiev D.I., Approaches to assessing the effectiveness of chemicals on core material of Domanic deposits (In Russ.), Neftyanaya provintsiya, 2019, no. 3(19), pp. 141–155, DOI: https://doi.org/10.25689/NP.2019.3.141-155.
14. Ibragimov N.G., Musabirov M.Kh., Dmitrieva A.Yu. et al., On necessity of targeted approach to selection of chemical systems for bottomhole zone treatment of Tulskian-Bobrikovskian reservoirs (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2018, no. 7, pp. 20–23, DOI: 10.24887/0028-2448-2018-7-20-23.
15. Musabirov M.Kh., Dmitrieva A.Yu., Podbor kislotnykh kompozitsiy dlya obrabotki prizaboynoy zony plastov mestorozhdeniy NGDU “Bavlyneft'” (Selection of acid compositions for treatment of bottomhole formation zones of oil and gas production department "Bavlyneft"), Proceedings of TatNIPIneft' / PAO “Tatneft'”, 2017, V. 85, pp. 217–228.
16. Patent RU 2724832 C1, Complex procedure for selection of acid compositions for intensification of oil production in domanic deposits, Inventors: Zakirov I.S., Zakharova E.F., Dmitrieva A.Yu., Budkevich R.L., Ganiev D.I.
17. Dmitrieva A.Yu., Musabirov M.Kh., Abusalimov E.M. et al., Innovative foam-acid technology of bottom-hole area for intensification of oil production from carbonate reservoirs in PJSC "Tatneft" (In Russ.), Ekspozitsiya Neft' Gaz, 2016, no. 5, pp. 30–33.18. Ibragimov N.G., Ismagilov F.Z., Musabirov M.Kh., Abusalimov E.M., Analysis of well stimulation pilot projects in Tatneft OAO (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2014, no. 7, pp. 40–43.