Urea application to improve the efficiency of hydrochloric acid treatments of carbonate reservoirs
- Authors: Vaganov R.A.1, Zhigarev V.A.1, Kositsyna S.S.1, Chernykh D.D.1
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Affiliations:
- Siberian Federal University
- Issue: Vol 336, No 3 (2025)
- Pages: 18-25
- Section: Articles
- URL: https://ogarev-online.ru/2500-1019/article/view/288580
- DOI: https://doi.org/10.18799/24131830/2025/3/4679
- ID: 288580
Cite item
Full Text
Abstract
Relevance. The trend of an annual increase in the share of fields introduced into industrial development and confined to carbonate reservoirs. Predetermines the prospects for the development of inflow stimulation methods. The article deals with issues related to increasing the efficiency of hydrochloric acid treatments of carbonate reservoirs.
Aim. Determination of technological solutions to increase the efficiency of hydrochloric acid treatments on carbonate reservoirs.
Methods. Experimental research, statistical methods.
Results and conclusions. The paper introduces the analysis of acid compositions used for hydrochloric acid treatments and the results of laboratory studies of hydrochloric acid compositions on core samples in the Eastern Siberia. The authors have determined the compatibility of formation fluids and acid compositions as well as the rate of core dissolution for selected compositions. The authors carried out the experiments on measuring the filtration-capacitive properties of core samples. The effectiveness of using urea as a hydrochloric acid modifier for selective hydrochloric acid treatments of carbonate reservoirs was confirmed in laboratory conditions. The authors obtained the changes in the rate of hydrochloric acid with dolomite from urea residues. They assessed the expected effect from urea use in hydrochloric acid treatments of carbonate reservoirs and the predicted values of the increase in oil production after hydrochloric acid treatments with urea. It was shown that using an acid composition with urea increases the efficiency of oil production by 26% compared to the application of a base solution of 24% HCl during hydrochloric acid treatments. The paper introduces the analysis of the competitive advantages of urea in comparison with analogues on the Russian market. This showed that this reagent is widely available on the Russian market and its cost is lower than that of the reagents presented when testing acid compositions.
Keywords
About the authors
Roman A. Vaganov
Siberian Federal University
Email: RVaganov@sfu-kras.ru
Researcher
Russian Federation, 82, bld. 6, Svobodny avenue, Krasnoyarsk, 660041Vladimir A. Zhigarev
Siberian Federal University
Author for correspondence.
Email: VZhigarev@sfu-kras.ru
ORCID iD: 0000-0001-5905-6365
Senior Lecturer
Russian Federation, 82, bld. 6, Svobodny avenue, Krasnoyarsk, 660041Svetlana S. Kositsyna
Siberian Federal University
Email: SKositsyna@sfu-kras.ru
ORCID iD: 0000-0002-7997-9754
Cand. Diss., Assistant Professor
Russian Federation, 82, bld. 6, Svobodny avenue, Krasnoyarsk, 660041Daniil D. Chernykh
Siberian Federal University
Email: dan.chernyx2010@gmail.com
ORCID iD: 0009-0000-0648-7479
Master’s Student
Russian Federation, 82, bld. 6, Svobodny avenue, Krasnoyarsk, 660041References
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