THE OIL-PRODUCING POTENTIAL OF THE JURASSIC DEPOSITS OF THE ARYSKUM DEPRESSION OF THE SOUTH TORGAI BASIN

The purpose of this study is to study and evaluate the oil source potential of the Mesozoic rocks of the Aryskum depression using the Rock-Eval method. The results of analysis by pyrolysis method allow us to obtain several important indicators related to the formation of oil, such as the content of free hydrocarbons, residual hydrocarbon content, the level of thermal maturity of the sample, and the amount of reactive organic matter. To achieve this goal, the following tasks were performed: 1. Assessment of oil-generating potential; 2. Determination of the stage of thermal maturity of organic matter and the type of kerogen.

Based on the results of geochemical studies of organic matter, it was found that the concentration of total organic carbon (TOC) in rock samples indicates the different generative potential of these rocks, covering the range from poor to rich. This indicates the potential of these rocks to generate hydrocarbons. The T_max values, which allow us to assess the thermal maturity of organic matter and its ability to generate oil, indicate that the organic matter of the studied samples can be classified as mature with the ability to generate oil and a low degree of maturity. The S₁+S₂ parameter made it possible to classify the studied samples as oil-generating with moderate potential and gas-generating.

These findings highlight the importance of geochemical studies of organic matter and pyrolytic analysis of rocks to assess their genetic, petroleum and maturity potential.