GEODYNAMIC PREREQUISITES FOR ASSESSING THE HYDROCARBON POTENTIAL OF THE BALKHASH BASIN
БАЛҚАШ БАССЕЙНІНІҢ МҰНАЙ-ГАЗ ӘЛЕУЕТІН БАҒАЛАУДЫҢ ГЕОДИНАМИКАЛЫҚ АЛҒЫШАРТТАРЫ
Zholtayev G.Z.
September-October 2025National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2025#2025-September-OctoberIssue 593 - 107 pp.
The Balkhash sedimentary basin is one of the largest geostructural elements in the southeast of Kazakhstan and remains poorly studied in terms of its oil and gas potential. The fundamental research problem lies in the ambiguity of existing concepts regarding the nature, structure, and hydrocarbon potential of the basin, particularly in its central subsided part. The relevance of the topic is driven by the need to diversify sources of hydrocarbon raw materials, as well as the socio-economic importance of potentially discovering new fields for the southern regions of the country. The study employs methods of comprehensive analysis of geological and geophysical data, including gravimetry, magnetometry, electrical exploration, heat flow data, and the interpretation of structural-tectonic information. Based on the reconstruction of the geodynamic evolution of the region, a new model of the structure of the Balkhash basin is proposed, which includes the identification of graben-synclines and tectonic steps. The key hypothesis is the presence of slightly deformed Upper Paleozoic and Jurassic sedimentary and volcanogenic-sedimentary complexes in the central part of the basin, which show signs of hydrocarbon generation. Drawing on analogies with hydrocarbon-bearing basins of the Junggar zone (China) and the geochemical characteristics of coalbearing and bituminous strata, the author substantiates the areas prospectivity for oil and gas. As a practical conclusion, a three-stage program of exploration work is proposed, involving regional seismic surveys, refinement of potential structures, and drilling of exploratory wells. The results of the study can be used in planning geological exploration activities, selecting priority areas for further investment, and developing regional energy security programs.
anticlines , basin , facies , graben-synclines , hydrocarbon-bearing sequences
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Institute of geological sciences named after K.I. Satbayev, Almaty, Kazakhstan
Institute of geological sciences named after K.I. Satbayev
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