摘要
通过对比珠江口盆地东沙隆地北部、恩平凹陷、东沙隆起中部和白云凹陷的4组原油生物标志化合物及碳同位素特征的相似和相异点，证明盆地南部白云凹陷生成的油曾向东沙隆起及恩平凹陷南坡超过35－40km的长距离运移。白云凹陷具备优越的生油条件，存在4套生油层，生油岩有机质丰度高、类型好、成熟度适中。白云凹陷有效生油岩的面积及厚度为盆地内各凹陷之冠，排油时间长，可供聚集的排油量亦居盆地各凹陷之首，是油源十分丰富的生油凹陷，可为其北部隆起区的油气聚集提供雄厚的物质基础。
Similarities and differences of biomarkers and carbon isotopes of four crude oils from northen Dongsha massif,Enping sag,Central Dongsha massif,and Baiyun sag in Pearl River Mouth Basin proved that the oil generated in Baiyun sag in southern part of the basin once migrated over 35—40 km to Dongsha massif and the southern slope of Enping sag.Four suits of source beds have been found in Baiyun sag. These source rocks are of high richness,good kerogen type and suitable maturity,which are excellent conditions for oil generation.Compared with all the sags in the basin,there are the biggest area and thickness of efficient source rocks and longest time of oil expulsion with largest quantities for accumulation in Baiyun sag.Plenty of oil sources in Baiyun sag provide large amount hydrocarbons enough for oil and gas accumulation in the northern massif area of the sag.
出处
《中国海上油气（地质）》
1991年第4期45-55,共11页
China Offshore Oil and Gas(Geology)
