松辽盆地南部火山岩及其在成藏过程中的作用

Volcanic Rock and Its Function During Rerservoir-forming in Southern Songliao Basin

为全面了解松辽盆地火山岩的分布情况 ,依据钻孔并结合航磁及地震资料 ,对松辽盆地南部火山岩的分布特征、岩石学特征及其与油气成藏的关系进行研究 ,指出火山岩在平面上东南隆起区最为发育 ,不同地区的火山岩发育程度差异较大 ;纵向上火山岩主要发育在深部地层 ,火山岩的纵向分布反映了火山活动具有多期次、多旋回、间歇性强的特点。火山岩既可以作为储层 ,又可以作为盖层 ,火山活动促进有机质的演化 ,有利于油气的生成和运移。

This paper studies the distribution characteristics, the petrologic characteristics and the function during rerservoir-forming of volcanic rock in southern Songliao Basin.According to the data of drilling,seismic and aeromagnetic,it predicts the distribution of volcanic rock and proposes that volcanic rock is very developmental in southeast uplift area,it is relatively developmental in western slope area, it isn't very developmental in central depression area,the degree of development of volcanic rock is very different in different areas. Volcanic rock develops mainly in deep formation, the distribution shows that volcanic rock has the characteristics of multi-stages and multi-times and multi-cycles.Volcanic rock can generate CO_2 gas and great heat that helps the evolution of organic matter,volcanic rock is special reservoir, and it is also the good local cap rock;so research on volcanic rock has a significance for exploration of oil and gas.