摘要
通过对松辽盆地兴城地区火山岩相测井资料的研究,得到了自然伽马和深、浅双侧向测井在火山岩相中的基本特征:火山通道相除了火山颈亚相玄武岩显示低伽马和火山颈亚相凝灰岩显示低阻外,均为高伽马、中阻;爆发相除了空落亚相为低—中低阻外都是低阻;自然伽马测井可以区分喷溢相火山岩的岩性,双侧向测井显示喷溢相火山岩为中低阻、中阻;侵出相火山熔岩自然伽马测井显示高值,双侧向测井显示低—中低值,侵出相外带亚相凝灰熔岩为中伽马、中阻的特征。以上述岩相中测井特征作为参照,通过测井特征的对比分析达到对岩相和岩性识别的目的,还用实例介绍了测井资料在火山相中识别岩相特殊岩性应用。
The basic characteristics of Gama Ray(GR)and dual laterolog(DLL)in volcanic lithofacies are obtained based on the analysis of the well logging data of volcanic rocks in Xingcheng area of Songliao Basin.The logging characteristics are as follows:Except that basalt shows low value of GR and tuff shows low value of DLL in volcanic neck subfacies,the others show high value of GR and media value of DLL in volcanic vent facies.Explosive facies shows low value of DLL except showing media-low value of DLL in subfacies of air fall.The lithology of effusive-facies volcanic rock can be distinguished by GR logging.Effusive facies shows low or media-low value of DLL.Extrusive-facies volcanic lava shows high value of GR and low or media-low value of DLL.Extrusive and subfacies tuff lava shows media value of GR and DLL.This paper illustrates the practical application of logging data in the identification of special lithology of lithofacies from volcanic facies so as to identify lithofacies and lithology by making comparative analysis of the logging characteristics mentioned above.
出处
《中国石油勘探》
CAS
2007年第4期32-36,共5页
China Petroleum Exploration
关键词
测井资料
火山岩相
特征
应用
松辽盆地
兴城
logging data
volcanic lithofacies
characteristic
application
Songliao Basin
Xingcheng area
