利用地球化学测井资料识别火山岩岩性

Recognition of volcanic rock lithology by geochemical logging data

火山岩的岩性复杂,从超基性到酸性火山岩均有出现,不仅有火山熔岩,也有火山喷发岩,矿物成分复杂,难以识别。在对松辽盆地徐深地区火山岩岩性测井数据资料研究基础上,结合地球化学测井(ECS)方法、元素交会图法和地球化学测井(ECS)主成分分析,建立起了一套火山岩岩性识别方法,并对待判井段进行了检验,取得了较好效果。

The lithology of volcanic rock is rather complex. This kind of property can be seen from basic to acidic one. The rocks include both lava and eruption one, the mineral components of them are pretty complicated and difficult to recognize. On the basis of the studies of lithology logging data in Xushen region of Songliao Basin and integrating with geochemical well logging-Elemental Capture Spectroscopy （ECS） method, element cross plot and the main component analysis of the above method, a set of volcanic rock recognizing method has been established and furthermore the required well interval has been tested by it. Finally the much better results have been obtained.