Comparison of the Pore Space Transformation and Newly Generated Hydrocarbons Composition in Result of Thermal Heating of Domanic and Bazhenov Rock Formations

This paper presents the results of organic matter transformation in the rocks of the Jurassic high-carbon formation and Domanik high-carbon formation study. The uniqueness of these deposits lies in the fact that they are both a proven highly productive oil source stratum and can contain a significant amount of hydrocarbons that have not yet been emigrated and/or generated. This gives the right to consider these deposits as a single non-structural hydrocarbon reservoir, from which part of the hydrocarbons left and migrated into structural traps, and part remained and represents undiscovered hydrocarbon resources. The main problem in such rocks is the difficulty of extracting hydrocarbons, they are located in a low porous matrix. In addition, the organic matter itself acts as a sorbent and hinders their emigration. Also, hydrocarbons can be found in closed and sealed pores. Investigation of the transformation of organic matter, pore space and the composition of released synthetic hydrocarbon compounds in high-carbon rocks in the future may contribute to the selection of optimal technologies for the development of unconventional oil and gas reservoirs.