交叉孔压水试验法确定三维各向异性渗透张量

DETERMINATION OF THE ANISOTROPIC THREE-DEMENSION PERMEABILITY TENSOR BY CROSS-HOLE INJECTION TESTING

本文根据Hsieh的交叉孔压水试验法,在假定含水层渗透张量有一主轴垂直的条件下,提出了考虑压水段和观测段长度的三维渗透张量计算稳定流公式和方法,并利用双管单栓塞压水试验器在一砂泥岩各向异性裂隙含水层中进行了试验,同时,给出了压水试验方法及实际应用结果。

A method is proposed for determining the ani-sotropic, three-dimension permeability tensor in afractured medium. Under the condition where thereis one vertical principal direction of permeabilitytensor in,the medium,the proposed formula hasdealt with the lehgths both of Injecting interval andof monitoring interval. A practical example is givento show how the. proposed approach, which makesuse of 'Double Pipe-Single Packer'injection instru-ment,works in the fractured aquifer consisting ofthe sandstone-shale alternation.