音频大地电磁测量和激电测深在找水中的应用

The Application of Audio Magnetotelluric Measurement and Induced Polarization Depth Measurement in Water Exploration

音频大地电磁测量(AMT)用于探测断层、破碎带等隐伏构造为激发极化法提供找水有利区,进一步通过激发极化法测定视电阻率(ρs)、视极化率(ηs)参数确定含水层位置、深度及下一步钻探打井位置。裂隙水赋存于坚硬岩石裂隙中的地下水。裂隙的密集程度、开启程度、连通情况等直接影响裂隙水的分布、运动和富集。构造裂隙水不仅分布广泛,还在一定条件下能大量富集。断层裂隙,具有导水性好、规模大的断层,还能起通道作用,沟通不同含水层中的地下水,甚至与地表水连通,为供水工程提供丰富的水源。

Audio magnetotelluric measurement(AMT)is used to detect hidden structures such as faults and fractured zones,providing favorable areas for water exploration through induced polarization method.Furthermore,the apparent resistivity is measured through induced polarization method(ρs)Visual polarizability(ηs)Determine the location and depth of the aquifer,as well as the location of the next drilling well.Fissure water exists in underground water in hard rock fractures.The density,opening degree,and connectivity of cracks directly affect the distribution,movement,and enrichment of crack water.Structural fissure water is not only widely distributed,but can also accumulate in large quantities under certain conditions.Fault fissures,with good hydraulic conductivity and large scale,can also act as channels to connect groundwater in different aquifers,and even connect with surface water,providing abundant water sources for water supply projects.