瞬变电磁法在地下储油洞库水幕质量检测中的应用

Application of transient electromagnetic method in quality detection of water curtain for underground oil storage cavern

地下水封储油洞库水幕形成的质量是工程建设的关键,但是现阶段的检测方法均不能直观判断洞库整体水幕的形成质量,且都具有一定的盲目性。文中主要通过对储油洞库的水幕巷道两个测段进行水幕质量检测,对充水前后的视电阻率等值线图加以分析,来判断水幕的形成质量。分析结果表明:利用瞬变电磁对低电阻体(含水体)的高敏感性,对水幕形成(水幕孔充水)前后洞库水幕区岩体内的裂隙以及节理等构造的含水情况进行检测,并加以对比分析,可以直观地判断水幕的形成质量。

The formation quality of the water curtain is the key project in water sealed underground oil storage caverns. Because of the blindness of the current methods, most of them can＇ t judge the formation quality of the water curtain cave effectively. By using the transient electromagnetic method, the formation quality of water curtain can be judged intuitively. Through detecting water curtain quality of two measuring sections of the water curtain roadway in the oil storage caverns and analyzing the apparent resistivity isopleth map before and after water filled, the forming quality of the water curtain is determined. The results show that by using the strong sensitivity of the transient electromagnetic method to the low resistance body （aquifer） , we can judge the formation quality of the water curtain intuitively by detecting and comparatively analyzing the aqueous condition of the rock cracks and joints in the water curtain zone before and after the formation of water curtain.