大庆石油地质与开发

2005, (06) 14-16+103-104

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对成藏期定量分析中自生矿物定年的探讨
Dating of Authegenic Mineral in Quantitative Analysis on Reservoir Formation Time

林景晔,杨庆杰,尹大庆,陈萍
LIN Jing-ye,et al.(Exploration and Development Research Institute of Daqing Oil Field Company Ltd.,Daqing 163712,China)

摘要(Abstract):

简要介绍了传统的主要成藏期分析方法和近年来发展起来的定量成藏期分析新方法。结合松辽盆地北部齐家-古龙及周边的扶余、杨大城子油层实例,详细分析了自生矿物定年基本原理,指出了自生伊利石的同位素年龄仅能代表烃类大量充填储层的时间,有时可代表储层最早形成油气藏的时间,它并不代表保存到现今的油气藏的形成时间。一般来讲,储层最早形成的油气藏与保存到现今的油气藏在时间上是有区别的,研究保存到现今的油气藏的形成时间对勘探找油的意义更大。提出了在成藏期定量分析中,包括成岩矿物、流体包裹体等许多新的技术和方法都不具有“指纹”效应。油气成藏期研究应该是地球化学技术与地质背景相结合,传统方法与新方法相结合,定性与定量相结合,只有这样才会收到良好成果。
This paper introduces conventional method for analyzing reservoir formation time and new quantitative method developed in recent years.Combining with the case of Qijia-Gulong and Fuyu and Yangdachengzi reservoirs in Songliao Basin,it analyzes the theory of dating of authegenic mineral.The isotope age of authegenic illite can only represent the time of large amount of hydrocarbon filling reservoirs.Sometimes it can represent the earliest time when hydrocarbon reservoir forms.It cannot represent the formation time of the reservoirs preserved until now.Generally,the times of reservoirs formed earliest and preserved until now are different.Study on the formation time of the reservoir preserved until now has more significance.This paper proposes that,in the quantitative analysis of reservoir formation time,many new techniques such as diagenetic mineral and fluid inclusion do not have"fingerpring"effect.Study on reservoir formation time should combine geochemical technology with geologic background,conventional method with new technique,and quanlitative with quantitative.

关键词(KeyWords): 成藏年代;成岩矿物定年;小型油藏群;自生伊利石
reservoir formation time;dating of diagenetic mineral;small scale reservoir group;authegenic illite

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作者(Author): 林景晔,杨庆杰,尹大庆,陈萍
LIN Jing-ye,et al.(Exploration and Development Research Institute of Daqing Oil Field Company Ltd.,Daqing 163712,China)

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