摘要
作者选取了不同厚度的油源岩,通过连续取样进行系统的地球化学分析,对油气初次运移的地球化学效应进行了探讨,指出油气初次运移有两个明显的地球化学效应:1. 贫化效应,2.色层效应,油气的不同成分排出生油岩的程度不同。本文依据源岩的压实特征及地球化学效应将源岩区分为充分排烃型、排烃型、具滞烃带排烃型、侧向排烃型和压裂微裂隙排烃型五种类型,并探讨了它们的特征和分布规律。
Based on the systematic organic geochemical analysis of continuous sampling in source rocks of different thickness, the paper discusses the geochemical effect of primary migration of oil and concludes that there are two apparent effects. The first is depletive effect, and the second is chromatographic effect. So the expulsion from source rocks of different compenents is various. Generally, hydrocarbon is easier to expelled than non-hydrocarbon. So does saturated HC than aromatic HC, chain alkane than cycloalkane, normal alkane than branched ones, and HC with low carbon number than that with high carbon number. According to the compac-tion and geochemical effect, the source rocks are classified into five types: fully expelled, expelled, with hydrocarbon stagnation,lateraly expelled and expelled throu-gh pressure fracture at the same time their characters and distribution are descri-bed.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1990年第1期75-86,共12页
Earth Science-Journal of China University of Geosciences
关键词
初次
运移
地球化学效应
排烃
油气
geochemical effect, source rocks, primary migration of oil, expelled type.
