石油与天然气地质 ›› 1985, Vol. 6 ›› Issue (2): 150-158.doi: 10.11743/ogg19850207

• 论文 • 上一篇    下一篇

膏盐沉积盆地形成的未成熟石油

傅家谟1, 盛国英1, 江继纲2   

  1. 1. 中国科学院地球化学研究所;
    2. 江汉石油管理局勘探开发研究院
  • 收稿日期:1984-12-12 出版日期:1985-06-25 发布日期:2012-01-16

IMMATURE OIL ORIGINATED FROM A SALINE DEPOSIT-BEARING BASIN

Fu Jiamo1, Sheng Guoying1, Jiang Jigang2   

  1. 1. Institute of Geochemistry, Academia Sinica, Guiyang;
    2. Scientific Research Institue of Petroleum Exploration and Development, Jianghan Oilfield
  • Received:1984-12-12 Online:1985-06-25 Published:2012-01-16

PDF (PC)

387

被引次数

108

摘要：

未成熟石油的研究具有重要的理论意义与实践意义。现代石油成因理论认为,石油是干酪根在沉积岩成岩作用晚期热降解而生成的。根据这一理论,石油生成有一个门限深度与一个相应的门限温度,只有在门限深度以下的生油岩才具有勘探意义。晚期成油说已为国内外的石油勘探实践证实是正确的,具有普遍的指导意义。

Abstract:

Immature oils,especially immature commercial oils,are of key importance both in theory and practice.Guanghua anticline of Jianghan salt-lake basin of Paleogene is one of the oil-bearing structures which have certain amount of petroleum.According to data of structural feature and lithological complex,Guang-33 oil produced at the depth of 1829.3-1929.6m of the anticline is thought to be indigenous,of which the vitrinite reflectivity is 0.45-0.5%.Quantitative study of biomarkers shows that the oil has a high content of phytane,steranes and triterpanes as well as nickel porphyrin which are of special significance.Compared this very high content of biomarkers with that of immature salt-lake source rocks,it can be seen clearly that the maturity ofthe oil is quite low indeed,and the molecular variations have not yet been polluted too much.Thus an inference can be drawn from molecular variations,especially from DPEP/(DPEP+ETIO)ratio,that the maturity of the oil isestimated to be equal to R?0.43%.Based on the data of structural feature,maturity of reservoir rocks and biomarker quantitative and qualitative study,it can be concluded that theGuang-33 oil is a typical immature commercial oil formed in salt-lake environ-ment.