摘要
应用现代有机岩石学方法，配合有机地球化学方法，通过对塔里木盆地三叠系烃源岩的研究，认识了一种较特殊的烃源岩类型，其生烃母质以菌解无定形体为主，不仅其实测镜质组反射率Ｒｏ具有明显抑制作用，而且其生烃早，“液态窗”范围介于镜质组Ｒｏ为０．４０％—０．９５％之间。这类烃源岩生烃潜力较强（相当于ⅡＢ型干酪根），实际上已进入成熟——成烃峰期阶段，并广泛分布于塔北轮南及其以南地区，预测展布面积达１．０—１．５万ｋｍ２。本研究成果为重新认识塔里木盆地三叠系油气生成潜力提供了依据。
On the basis of organic petrological and geochemical studies of Triassic source rocks in Tarim Basin,a particular source rock has been recognised,which is mainly consisted of bio-degraded amorphinite or its thermal-altered product micrinite B. This source rock is characterized by not only obvious suppression of measured vitrinite R o,but early hydrocarbon generation.Its oil window is in the range of vitrinite R o 0.40% to 0.95%. This source rock has attained mature to oil peak stages in most part of Lunnan area and Manjiaer depression,and cover about 1.0×10 4—1.5×10 4km 4.This study has provided some mew evidences for the re-evaluation of hydrocarbon potential of Triassic source rocks in Tarim Basin,and greatly enlarged the hydrocarbon prospective.
出处
《地球化学》
CAS
CSCD
北大核心
1997年第1期64-71,共8页
Geochimica
关键词
三叠系
烃源岩
抑制作用
成烃作用
油气勘探
Triassic,source rock,suppression,hydrocarbon generation,Tarim Basin
