«Proceedings of Gubkin University»

Experimental and theoretical study of carbonate rocks dissolution in chelating reagents

UDC: 622.276.63
DOI: 10.33285/2073-9028-2022-2(307)-20-36

Authors:

¹ Gubkin Russian State University of Oil and Gas (National Research University), Moscow, Russian Federation
² Skolkovo Institute of Science and Technology, Moscow, Russian Federation

Keywords: chelating reagents, EDTA, carbonate reservoir, citric acid, ammonium chloride, molecular dynamics

Annotation:

This paper is dedicated to the problem of carbonate rocks dissolution in chelating reagents solutions and selection of well stimulation fluids based on the reagents. These reagents possess a number of advantages over traditional HCl-based compositions. The main disadvantage of these compositions is the low dissolution capacity. This can be eliminated by studying carbonates dissolution mechanism at different conditions and additives selection with the further composition optimization. The results, presented in this paper, show, that maximum dissolution capacity of ethylenediaminetetraacetic acid (EDTA) towards carbonate rock is observed at neutral pH values because of the combination between protonic attack and surface complexation. Addition of citric acid and ammonium chloride results in the increase of the dissolution capacity. This occurs due to the of the diffusion coefficient and adsorption energy increase, which we revealed with the molecular dynamics simulation. The obtained composition may be optimized to create fluid for the effective carbonates stimulation.

Bibliography:

1. Experimental optimization of a recently developed matrix acid stimulation technology in heterogeneous carbonate reservoirs/H. Jafarpour, H. Aghaei, V. Litvin, R. Ashena//Journal of Petroleum Science and Engineering. – 2021. – Vol. 196. – Р. 108100. – DOI: 10.1016/j.petrol.2020.108100
2. Improving wormholing efficiency in carbonates with a novel system based on hydrochloric acid/C.S. Daeffler, J.F. del Valle, J. Kariampally [et al.]//SPE International Symposium on Formation Damage Control, 2018, Lafayette, Louisiana, February 7–9. – 2018. – DOI: 10.2118/189540-MS
3. Fredd C.N., Fogler H.S. The influence of chelating agents on the kinetics of calcite dissolution//Journal of Colloid Interface Science. – 1998. – Vol. 204, № 1. – P. 187–197. – DOI: 10.1006/ jcis.1998.5535
4. Fredd C.N., Fogler H.S. Influence of transport and reaction on wormhole formation in porous media//AIChE Journal. – 1998. – Vol. 44, № 9. – P. 1933–1949. – DOI: 10.1002/aic.690440902
5. Fredd C.N., Fogler H.S. Alternative Stimulation Fluids and Their Impact on Carbonate Acidizing//SPE Journal. – 1998. – Vol. 3, № 1. – P. 34–40. – DOI: 10.2118/31074-PA
6. Podbor zhelezostabiliziruyushchej dobavki k kislotnym sostavam dlya obrabotki terrigennyh kollektorov/N.A. Karpunin, D.V. Mardashov, D.G. Podoprigora [i dr.].//Gazovaya promyshlennost’. – 2019. – Т. 792, № 11. – S. 104–108.
7. Ngia T.T., Veliev M.M., Haj L.V. Issledovanie novyh kompozicionnyh sostavov na osnove helatorov i plavikovoj kisloty dlya povysheniya produktivnosti dobyvayushchih skvazhin s povyshennymi plastovymi temperaturami//Territoriya neftegaz. – 2015. – № 10. – S. 42–48.
8. Somasundaran P., Agar G.E. The zero point of charge of calcite//Journal of Colloid and Interface Science. – 1967. – Vol. 24, № 4. – P. 433–440. – DOI: 10.1016/0021-9797(67)90241-X
9. Wu Y.T., Grant C. Effect of chelation chemistry of sodium polyaspartate on the dissolution of calcite//Langmuir. – 2002. – Vol. 18, № 18. – P. 6813–6820. – DOI: 10.1021/la011839a
10. Frenier W.W., Fredd C.N., Chang F. Hydroxyaminocarboxylic acids produce superior formulations for matrix stimulation of carbonates at high temperatures//SPE Annual Technical Conference and Exhibition, 2001, New Orleans, Lousiana, September 30 – October 3. – 2001. – DOI: 10.2118/ 71696-MS
11. Hoang T.A., Ang H.M., Rohl A.L. Effects of organic additives on calcium sulfate scaling in pipes//Australian Journal of Chemistry. – 2009. – Vol. 62, № 8. – P. 927–933. – DOI: 10.1071/ CH08464
12. Campbell J.L., Eick M.J. Effects of oxyanions on the EDTA-promoted dissolution of goethite//Clays and Clay Minerals. – 2002. – Vol. 50, № 3. – P. 336–341. – DOI: 10.1346/ 00098600260358094
13. Molecular dynamics simulation and DFT calculation of “green” scale and corrosion inhibitor/ X. Chen, Y. Chen, J. Cui [et al.]//Computational Material Science. – 2021. – Vol. 188, November 2020. – P. 110–229. – DOI: 10.1016/j.commatsci.2020.110229
14. Optimum injection rate of a new chelate that can be used to stimulate carbonate reservoirs/M.A. Mahmoud, H.A. Nasr-El-Din, C.A. De Wolf, J.N. Le Page//SPE Journal. – 2011. – Vol. 16, № 4. – P. 968–980. – DOI: 10.2118/133497-PA
15. Pat. WO 90/11972, USA, IPC C02F 5/10, C23F 11/10. C23G 1/06. Sulfate scale dissolution/R.L. Morris, Paul J.M.; applicant Corporation “Mobil Oil”, filled 3.04.1990, published 18.10.1990.