Geochemical Characteristics and Significance of Aromatic Hydrocarbon in Oil and Gas

Abstract

Abstract: This paper reviews the application and advances of aromatic hydrocarbon biomarker in petroleum exploration and development, such as depositional environment, input of organic matter, migration, oil source correlation and thermal maturity. The result indicates that alkylnaphthalene and aromatic sulfur compounds are indicative of depositional environment and type of organic matter. Fluoranthene, perylene, pyrene benzo-pyrene and benzopyrene have been proposed as the input of terrigenous higher plant. Methylnaphthalene ratio and Methylphenanthrene index increase with the thermal maturity. The relative distribution of dibenzothiophene is well used for maturity assessment. The ratios of perylene to benzofluoranthene and perylene to benzo (e) pyrene are an effective index of thermal maturity. It is determined that the contents and distribution of pyrrolic compounds and dibenzothiophene are controlled by oil fraction during migration, which has potential significance in evaluating the oil migration and reservoir filling direction. The component of aromatic hydrocarbon in sediment is very complicated, so that great efforts should be made to identify them with more advanced apparatus and improve some biomarker index by experiments and practices.

Key words: aromatic hydrocarbon, sedimentary environment, thermal maturity, hydrocarbon migration

CLC Number:

TE112.11

WANG Chuan-yuan, DU Jian-guo, DUAN Yi, ZHOU Xiao-cheng, ZHENG Chao-yang, WU Bao-xiang. Geochemical Characteristics and Significance of Aromatic Hydrocarbon in Oil and Gas[J]. Xinjiang Petroleum Geology, 2007, 28(1): 29-32.

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