石油学报 ›› 1999, Vol. 20 ›› Issue (2): 30-34.DOI: 10.7623/syxb199902006

• 地质勘探 • 上一篇    下一篇

松辽盆地海侵地层的分子地球化学特征

侯读杰1, 黄清华2, 黄福堂2, 孔庆云2   

  1. 1. 江汉石油学院;
    2. 大庆石油勘探开发研究院
  • 收稿日期:1997-10-26 修回日期:1998-03-16 出版日期:1999-03-25 发布日期:2010-05-21
  • 作者简介:侯读杰,男,1964年11月生.1984年毕业于江汉石油学院石油地质专业.1998年5月在石油大学获博士学位,副教授现主要从事石油地球化学和油藏地球化学研究.通讯处:湖北省荆州市汀汉石油学院地球化学研究中心.邮政编码:4314102

THE CHARACTERISTICS OF MOLECULAR GEOCHEMISTRY OF MARINE TRANSGRESSION STRATA IN SONGLIAO BASIN

Hou Dujie1   

  1. Jianghan Petroleum Institute
  • Received:1997-10-26 Revised:1998-03-16 Online:1999-03-25 Published:2010-05-21

摘要: 通过对松辽盆地源岩的地化特征研究,发现在青山口组一段和嫩江组一段及二段源岩中广泛分布的甲藻甾烷,指示了松辽盆地的两次海侵作用.青山口组一段源岩中甲藻甾烷的含量较嫩江组一段及二段相对较高,并且具有相对较高丰度的C31甾烷.嫩江组一段及二段源岩的C31甾烷的含量普遍较低,这不仅说明了青山口组一段源岩与嫩江组一段及二段源岩的藻类分布有一定的差别,而且指示了松辽盆地青山口组一段沉积时期水体的盐度更高,海侵的程度更大.根据松辽盆地甲藻甾烷的含量,确定的嫩江组一段源岩和青山口组一段沉积时期的海侵方向主要为岔6井和三1井方向.

关键词: 海侵, 生物标志物, 甲藻甾烷, C31甾烷, 松辽盆地

Abstract: The relative high abundance of dinosterances has been found in the member No.1 of Qingshankou Formation and the members No.1 and No.2 of Nenjiang Formation based on the geochemical studies of source rocks in Songliao Basin.The widely distributed dinosterance in source rocks indicates that there were two periods of marine transgression in geological history.The relative content of dinosterane in source rocks in the member No.1 of Qingshankou Formation is higher than that in the members No.1 and No.2 of Nenjiang Formation.In addition,C31steranes have been identified only in the source rocks of member No.1 of Qingshankou Formation.This is not only attributed to differente algae in these formations,but also related to the differences between ancient sedimentary environment and the salinity in source rocks.The molecular fossil assemblage shows the relatively high salinity in source rocks of the member No.1 of Qingshankou Formation.It may indicate wide marine transgression in the period of the member No.1 of Qingshankou Formation sedimentation.The content of dinosterane has been tentatively used to determine the direction of marine transgression.

Key words: marine transgression, biomarker, dinosterane, C31sterane