Lithological Types of Deposit - A New Strategy for Exploration Works for Oil and Gas in Southern Mangushlak, Kazakhstan
Uzbekgaliev R. Al-Dujaili A.N. Tileuberdi N. Auelkhan E. Togizov K. Amralinova B. Akbarov E. Sanatbekov M.
2025Engineered Science Publisher
ES Energy and Environment
2025#29
The depletion of traditional structural traps in South Mangyshlak has prompted a strategic shift toward exploring lithological and stratigraphic types of oil and gas accumulations. This article examines the formation of such traps within the Jurassic and Triassic deposits, focusing on promising sandy horizons of fluvial and deltaic facies. These horizons are often confined by pinch-outs and transitions into dense, impermeable rocks. Through lithological analysis and paleogeographic reconstructions, the study enhances the accuracy of predicting hydrocarbon-bearing zones. The application of 3D seismic surveys and modern drilling techniques enables the identification and development of new, previously unrecognized reservoirs. Findings suggest that exploration efforts should be concentrated on Jurassic wedge-out zones located along structural flanks, above basement paleo-highs, and at intersections of stratigraphic unconformities with faults—areas considered favorable for significant hydrocarbon accumulations. Middle Jurassic deposits in Southern Mangyshlak and the Caspian region contain transitional fossil complexes, including both terrestrial flora and marine fauna. The lower (Aalenian–Bajocian) part features spores, pollen, and plant remains, reflecting continental (river) conditions. Overlying deltaic and shallow-marine sediments indicate a gradual marine transgression. Delta-floodplain complexes record intense terrigenous input from Mountain Mangyshlak. By the Callovian, deepening marine conditions set the stage for Upper Jurassic carbonate deposition.
Deposit and facies , Oil and gas potential , Sedimentology , South mangyshlak , Tectonics and rifting
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Department of Hydrogeology, Engineering and Oil and Gas Geology, Satbayev University, 22a Satbayev Street, Almaty, 050013, Kazakhstan
Petroleum Engineering Department, Amirkabir University of Technology, Tehran, 11369, Iran
Committee of Geology of the Ministry of Industry and Construction of the Republic of Kazakhstan, Astana, 010000, Kazakhstan
Department of Hydrogeology
Petroleum Engineering Department
Committee of Geology of the Ministry of Industry and Construction of the Republic of Kazakhstan
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