• 责任者：He Xunyun (Hangzhou Research Institute of Petroleum Geology ; PetroChina ; Hangzhou 310023 ; China) ; Zhong Ningning
• 刊名：Petroleum Exploration and Development
• 出版年：2009
• 卷期：36(2)
• 关键词：油气苗 ; oil and gas seep ; 油—源对比 ; oil-source rock correlation ; 广西 ; Guangxi
• 页码：p.190-194
• 图表：5 illus., 4 tables, 21 refs.
• 分类号：1003
• issnNo：ISSN1000-0747
• isbnNo：CN11-2360/TE

The group composition, chromatogram of oil and saturation hydrocarbon, carbon isotope and biomarkers of oil seepages in Lower Triassic limestone geode of Shiwandashan eType w:st="on">Basin were analyzed. The oil seepages are characterized by high content of saturation hydrocarbon and high ratio of saturation hydrocarbon to aromatic hydrocarbon; the value of main peak carbon is less than C21, Pr/ Ph ratio is 0.67~0.84, OEP is 0.84~0.97; δetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="True" SourceValue="13" UnitName="C">¹³ Cetcnv> value of oil seepages is -31.6‰~-30.7‰; the content of sterane and terpane is very low, mainly consisting of pregnane and tricyclic terpane; there is nearly no aromatic sterane in oil seepages. All these demonstrate that the oil seepages come from lower aquatic organic matter and have high maturity.