Evaluation of hydrocarbon generation potentials of Chang-8 source rocks in Huaqing area, Ordos basin

Through a systematic analysis of the organic matter abundances, organic matter types and organic matter maturity of Chang-8 source rocks in Huaqing area, the hydrocarbon generation potentials were evaluated. The TOC content, chloroform bitumen A contents, total hydrocarbon content and potential hydrocarbon generation amount of Chang-8 source rocks reflected a kind of good source rocks with high organic matter abundance. The index type of rock pyrolysis (S 2 /S3) and group composition of chloroform bitumen A reflected good organic matter types of which the main type was humic-sapropelic and a small amount was of sapropelic type and humic type. The maximum pyrolysis temperature(T max ) and maturity parameters of biomarkers reflected a mature evolution degree of organic matter in Chang-8 source rocks. According to the above, the Chang-8 source rocks in Huaqing area have a good hydrocarbon generation potential of being significantly effective oil source rocks, and attention should be paid to it in future studies.