利用电测井方法确定含水层及相互间补给关系

Recharging Relations between Aquifers Verified by Electric Logging

利用井液与地层水之间存在的电阻率差,采用人工盐化井液,测量其井液电阻率值的变化,以了解地下水的运动情况,进而划分含水层位置及其水力联系。实际操作中以盐化后井液电阻率为清孔后地层水电阻率的1/10为测量起点,并以一定时间间隔测绘电阻率曲线。根据电阻率测井曲线的变化形态,对一个含水层与二个含水层的位置进行了解释,并推断其含水层位的渗透性及补给关系。

By the use of resistivity difference existed between drilling fluid and strata water, through artificial drilling fluid salification, measuring its resistivity changing to find out groundwater movement, and then proceed to determine position of aquifers and their hydraulic relations. In practice, to take salified drilling fluid resistivity equals to 1/10 resistivity of original strata water as measuring start point, measuring and plotting resistivity trace under a certain time interval. Based on resistivity logging trace variation, can interpret positions of single aquifer and dual aquifers, and deduce permeability and recharging relation between water horizons.