Concentration of indicator minerals from oil reservoir rocks by high gradient magnetic separation

In the conditions of growing consumption of hydrocarbons and exhaustion of known fields, the development of new methods of exploration and evaluation of deposits, especially in complex geologic conditions, becomes especially urgent. This work is devoted to substantiation of application of high-gradient magnetic separation (HGMS) for concentration of indicator minerals in reservoir rocks as geochemical markers of deep oil. The object of the study were core samples of reservoir rocks of the Nerutynskoye field taken from depths of 2833.77−2833.97 m (K 3.2), 2920.86−2921.0 m (K 4.1) and 3911.14−3911.4 m (K 1.4). The studies confirmed the efficiency of VGMS for extraction of magnetic fraction and concentration of trace elements (vanadium, nickel, strontium, rubidium, titanium), which are important indicators of naphthidogenesis. The correlation between the content of these elements and the depth of occurrence of samples was established, which allows us to interpret geochemical changes in the section and their influence on the formation and migration of hydrocarbons. The revealed relationship between elemental composition and physicochemical conditions deepens the understanding of thermodynamic processes in the Earth’s crust and opens new prospects for exploration and development of oil fields in complex geological conditions. Concentration of trace elements by means of HGMS increases the accuracy of geochemical analysis and can become a promising direction for the search for deep oil.

Aleksandrova T. N., Nikolaeva N. V., Kuznetsov V. V., Afanasova A. V., Romashev A. O. Concentration of indicator minerals from oil reservoir rocks by high gradient magnetic separation. MIAB. Mining Inf. Anal. Bull. 2025;(11-1):220—239. [In Russ]. DOI: 10.25018/0236_1493_2025_111_0_220.

The work was performed within the framework of the state assignment “Investigation of thermodynamic processes of the Earth from the position of hydrocarbon genesis at great depths” FSRW — 2024−0008.

Aleksandrova T. N., Dr. Sci. (Eng.), Corresponding Member of Russian Academy of sciences, Professor, Head of the Mineral Processing department, ORCID ID: 0000-0002-3069-0001; Saint Petersburg Mining University, 199106, St. Petersburg, Vasilievsky Island, 21 line 2, Russia, e-mail: Aleksandrova_TN@pers.spmi.ru;
Nikolaeva N. V., Cand. Sci. (Eng.), Assistant Professor, ORCID ID: 0000-0001-7492-1847, Saint Petersburg Mining University, 199106, St. Petersburg, Vasilievsky Island, 21 line 2, Russia, e-mail: Nikolaeva_nv@pers.spmi.ru;
Kuznetsov V. V., Cand. Sci. (Eng.), Assistant, ORCID ID: 0000-0001-6159-316X, Saint Petersburg Mining University, 199106, St. Petersburg, Vasilievsky Island, 21 line 2, Russia, e-mail: kuznetsov@vvalen.ru;
Afanasova A. V., Cand. Sci. (Eng.), Assistant Professor, ORCID ID: 0000-0002-8451-2489, Saint-Petersburg Mining University, Saint Petersburg Mining University, 199106, St. Petersburg, Vasilievsky Island, 21 line 2, Russia, e-mail: Afanasova_av@pers.spmi.ru;
Romashev A. O. — Cand. Sci. (Eng.), Assistant Professor, ORCID ID: 0000-0003-3210-8000, Saint-Petersburg Mining University, Saint Petersburg Mining University, 199106, St. Petersburg, Vasilievsky Island, 21 line 2, Russia, e-mail: Romashev_ao@pers.spmi.ru.

Nikolaeva N. V., e-mail: Nikolaeva_nv@pers.spmi.ru

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