Thermal maturity of organic matter and type of kerogen of Mesozoic sediments, Aryskum depression
Madisheva R.K. Ozdoev S.M. Demeuova A.B. Amangeldiyeva G.B. Ozdoev S.M.
2024Institute of Metallurgy and Ore Beneficiation JSC
Kompleksnoe Ispolzovanie Mineralnogo Syra
2024#330Issue 361 - 67 pp.
This work is devoted to the study of the oil and gas source potential of the Mesozoic deposits of the Aryskum depression of the South Turgay oil and gas basin and aims to study the features of the geological structure, determine the facial-genetic type and degree of maturity of organic matter. Geochemical methods play an important role in assessing oil and gas source potential, one of which is pyrolytic core analysis to determine the type of organic matter and thermal maturity of the studied rock material samples. To achieve this goal, the results of pyrolytic analysis of stone material from Neocomian and Jurassic deposits were used. Analysis of geological and geophysical materials made it possible to trace the pattern of distribution over the area of oil and gas-bearing sandy layers and the underlying clay layers with high insulating properties in the Aryskum horizon. The results obtained show that the total organic carbon content ranges from 0.47 to 1.41 wt%. To establish the type of kerogen and its position relative to the zones of oil and gas formation, the Van Krevelen diagram was used in the coordinates of atomic ratios of the elemental composition of kerogen and its modification for pyrolytic data, indicating that the kerogen of the studied samples is a mixture of types I, II and III, facies-genetic the type of organic matter of which belongs to humic, humic-sapropelic, and the sedimentation conditions are coastal-marine environment in moderately reducing conditions.
Aryskum depression , hydrocarbons , oil and gas content , organic matter , South Turgay oil and gas basin , type of kerogen
Text of the article Перейти на текст статьи
Department of Geology, Karaganda Technical University named after Abylkas Saginov, Nursultan Nazarbayev Avenue, 56, Karaganda, 100000, Kazakhstan
Academician of the National Academy of Sciences of the Republic of Kazakhstan, Deputy Director of the Institute of Geological Sciences named after K. I. Satpayev, Kabanbai Batyr str., ug. Valikhanov str., 69/94, Almaty, 050010, Kazakhstan
Master of Science in Oil and Gas Geochemistry, Head of the Laboratory of Geochemical Studies of Oil, Nursultan Nazarbayev Avenue, Atyrau, Kazakhstan
Department of Geology
Academician of the National Academy of Sciences of the Republic of Kazakhstan
Master of Science in Oil and Gas Geochemistry
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026