摘要
嵊泗列岛位于舟山群岛北部,属于海上列岛,淡水匮乏,迫切需要寻找第四系古河道中赋存的淡水。根据该区的地质情况及地层岩性的物性特征,通过合理选择自然伽马、三侧向电阻率、不同极距的视电阻率及自然电位等参数来确定地层中含水层的赋存情况。勘探结果表明,由于隔水层的作用,使咸水层和淡水层的地层水得以独立存在。当自然电位受干扰,参数畸变时,用不同极距的电位电极系划分咸、淡水含水层,是一种有效的手段。
The Shengsi islands are the northern part of Zhoushan Archipelago, owing to short of fresh water supply, is cried for to find Quaternary System old channel fresh water. According to the area＇s geological condition and strata geophysical signatures, rationally selected parameters of gamma-ray, laterolog-3 resistivity, different polar distance apparent resistivity potential to determine aquifer hosting in strata. Exploration result demonstrated that owing to the existing of confining beds, salty and fresh groundwater can be substantives. When natural potential parameters distorted because of interference, then use different polar distances potential electrode array to differentiate salty and fresh aquifers as an effective means.
出处
《中国煤田地质》
2007年第A02期128-129,160,共3页
Coal Geology of China
关键词
海上测井
测井参数
含水层
隔水层
淡水层
咸水层
offshore well logging
logging parameter
, aquifer
, confining bed
fresh water aquifer
, salty water aquifer
