oa Molecular Characterization and Geochemical Significance of No Compounds in Saline Lacustrine Source Rock

NO compounds refer to compounds containing N and O heteroatoms, which are widely present in geological bodies. NO compounds contain rich geological and geochemical information and they are of great significance for petroleum exploration. High-resolution mass spectrometry (FT-ICR MS) is used to analyze the composition and distribution characteristics of nitrogen and oxygen heteroatom compounds in the source rocks of saline lacustrine facies. The results show that a total of 12 types of NO heteroatom compounds were detected in the analyzed samples, including N1, N1O1, N1O2, N1O3, N1S1, N1S2, N2O1, O1, O2, O3, O3S1, O4, mainly O2 and O3, followed by N1 and N1O1; The N1 category is dominated by DBE=9, 12, 15 and 18. The distribution of O2 compounds is controlled by biogenic sources and has great potential in predicting the original parent material. N1, O2, and N1O1 compounds are all influenced by maturity with polarization performance. NO compounds are also affected by the deposition environment. It is observed that there are abundant O2 and N1O1 compounds in the saline lacustrine facies source rocks. The research results can shed light for the research of genetic mechanism of oil and gas