| Summary: | 碩士 === 國立中央大學 === 應用地質研究所 === 101 === Effect of Flow Area on Data Analysis of Cross-borehole Double Slug Test in Fractured Formation
Abstract
Fractured is distribution and connectivity of discontinuity in fractured formation. Analysis the hydraulic test data by fractal geometry model with the characterized is the flow dimension n can be any non-integral number between 1 and 3. Setting the drilling process, the well surrounding of the geological media is destroyed, so that the original aquifer permeability changes, this phenomenon is called skin effect.
The flow area is impact on n and skin effect, test wells and observation wells at different flow area will be a set of corresponding estimate K and Ss values, resulting in a non-unique solution.The oscillatory response of cross-borehole double-packer slug tests in the fractured formation in Jianshi county. Slug test data showed oscillating response is a high permeability between test wells and observation wells. Using the model to analysis the water level changes in test wells and observation wells, explore the effect of flow dimension and skin effect in slug test to estimate hydraulic conductivity. Analysis test wells and observation wells at different flow area will be estimate of a corresponding set of K and Ss values in high penetration response. The error of K values is one order of slug test in the same data, and the wells field fractured of K values ranging from 4×〖10〗^(-4)with 6×〖10〗^(-3) between.
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