非洲多哥区域内找水方法研究与成井实践

Groundwater searching method researchand well completion Practices in the area of Togo,Africa

非洲多哥地区水资源短缺,严重威胁到当地人民群众生活用水,也制约了本地区的经济发展。如何针对多哥缺水地区水文地质特点,合理运用综合技术方法寻找地下水,是水文地质工作面临的十分重要问题。经统计多哥当地的成井率为60%,本文通过实际工程采用水文地质调查的方法,运用蓄水构造理论,循序渐进,总结出了不同地质地貌条件下地下水的补给、运动和富集规律。这种方法取得了较好找水效果,成井率提升到67%。笔者通过近3 a来的施工过程,不断摸索和总结,总结出在多哥地区的找水方法和一套成井工艺的流程研究,为今后在非洲地区相同的地质条件下打井工作提供借鉴。

The shortage of groundwater resources in Togo,Africa,seriously threatens the living water supply of the local people and restricts the economic development of the region. It is an important issue to use comprehensive technical methods to search for groundwater based on the characteristics of hydro-geology in the areas suffering to water shortage of Togo. According to statistics,the rate of well completion in Togo is only 60 %. Base on the method of hydro-geological survey adopted in actual construction,and the theory of water-bearing structure,gradually summarizes the recharge,movement,and enrichment regularities of groundwater under different geological and geomorphological conditions. This hydro-geological survey method has increased the efficiency of groundwater searching,and the well completion rate has been increased to 67 %. During the construction over the past three years,the author continuously explored and summed up groundwater searching methodin Togo and the flow chart of a well completion process,which will provide reference for future drilling works under the same geological conditions in Africa.