-
摘要: 塔河油田是我国迄今为止在古生界海相碳酸盐岩层系中发现的最大的油气田，但是原油的油源目前仍然是一个有争异的问题。对塔河油田原油和寒武系、奥陶系烃源岩进行了地球化学分析，研究了生物标志化合物组成和分布特征，进行了油源对比。原油和烃源岩中正构烷烃、类异戊二烯烃、甾烷和萜烷组成及分布特征，显示了塔河油田原油与寒武系、奥陶系烃源岩具有亲缘关系，这与塔河油田长期成藏和多期成藏，从而允许寒武系、奥陶系烃源岩持续供油的地质事实相符合。研究认为，塔河油田原油与寒武系、奥陶系烃源岩中一些生物标志化合物组成的差异，可能与它们起源于有机质不同演化阶段有关，这一点应在研究具有高演化有机质特征的油源对比时予以重视。Abstract: Tahe oilfield of Tarim basin is the largest oilfield found in Paleozoic marine carbonate in China so far. However, its oil source is not still ascertained. In this paper, geochemical compositions of the crude oils of Tahe oilfield and CambrianOrdovician source rocks were studied, and oil source correlation was carried out. The compositional and distributional characteristics of nalkanes, isoprenoid hydrocarbons, steranes and terpanes in crude oils and source rocks indicate that the studied crude oils are closely related to CambrianOrdovician source rocks. This is identical with the geological fact that Tahe oilfield has undergone the longterm and multiperiod accumulation process which permitted the CambrianOrdovician source rocks to continuouslly supply crude oil for the oilfield. This result still shows that the difference in biomarker compositions between the crude oils from Tahe oilfield and CambrianOrdovician source rocks may be related to the contribution of these biomarker compounds originated from different evolutionary stages of organic matter. This should be paid special attention to study the correlation of oil and source rock with high maturity.
-
Key words:
- Tahe Oilfield /
- crude oil and source rocks /
- biomarkers /
- oilsource correlation
-
点击查看大图
计量
- 文章访问数: 2533
- HTML全文浏览量: 14
- PDF下载量: 713
- 被引次数: 0
下载:
