全息电磁法在大杨树盆地勘探方法试验成果认识

Test result of the holographic electromagnetic exploration method in Dayangshu Basin

采用全息电磁法在大杨树盆地火山岩覆盖区开展了方法试验,试验区区域地质构造复杂,火山岩较为发育,勘探工作程度较高,4口钻井为验证方法有效性提供了便利条件。三维反演成果与钻井揭露基本一致,反演电阻率异常形态与分布反应了火山岩特征,区分了目标层九峰山组火山岩与沉积岩,解决了大杨树盆地“三明治”地质结构,说明在大杨树盆地勘探效果较好。

The holographic electromagnetic method is tested in the Dayangshu Basin covered by volcanic rocks.There is complex geological structure in the test area,the volcanic rocks are relatively well developed,and the exploration degree is high.Four drilling wells provide the convenient condition to verify the method effectiveness.The3D inversion result is basically consistent with the drilling result.The inversion resistivity anomaly reflects the characteristics of volcanic rocks,and distinguishes the volcanic rocks and sedimentary rocks of the target layer,Jiufengshan Formation.The"sandwich"geological structure of Dayangshu Basin is solved.It is indicated that the exploration effect is good in Dayangshu Basin.