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总结了目前火山岩岩性识别的方法,重点讨论了测井资料交会图法和成像测井识别法。以松辽盆地徐家围子断陷兴城-升平地区深层白垩系营城组火山岩为研究实例,从矿物成分研究入手,优选密度测井、中子测井、自然伽马测井、铀钍等测井曲线的进行交会,编制出火山岩岩性成分识别的交会图版,确定了火山熔岩和火山碎屑岩的成像测井识别模式,绘制了火山岩岩性识别流程。并以此为依据对研究区域的火山岩进行识别,识别结果与岩性剖面符合较好。表明该方法具有一定的推广价值。
Summarized the current methods of lithology identification of volcanic rocks, focusing on the cross-plot method of logging data and imaging logging identification method. Taking the volcanic rocks of Yingcheng-Shengping area, the Cretaceous Yingcheng Formation, in the Xingcheng-Shengping area, the Xujiaweizi rifting depression of the Songliao Basin as an example, the densification logging, neutron logging, gamma ray logging and uranium-thorium Logging intersections, the cross-plot of the identification of volcanic lithology components was compiled, the imaging logging identification pattern of volcanic lava and pyroclastic rocks was determined, and the lithology recognition process of volcanic rocks was drawn. Based on this, the volcanic rocks in the study area are identified, and the recognition results are in good agreement with the lithologic sections. It shows that the method has certain promotion value.