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抽水试验中的几个问题一、抽水时过滤器的位置和长度正确地确定过滤器的位置和长度,是决定抽水试验能否正确测定岩石透水性的主要环节.我们过去在工作中,常常错误的确定了过滤器的位置和长度.如在揭露含水层全厚度的钻孔中抽水,但所下过滤器的长度却不等于含水层的全厚度;在不完整井中抽水,过滤器的位置和长度也没有按照“K”值的计算图式确定,致使抽水试验结果,选择不到恰当的计算“K”值的图式.
A few questions in the pumping test First, the position and length of the filter when pumping water Correctly determine the position and length of the filter is the main part of determining whether the pumping test can correctly determine the permeability of the rock we used to work in the past, often wrong The location and length of the filter are determined as in the full thickness of the exposed aquifer, but the length of the filter is not equal to the full thickness of the aquifer; pumping in incomplete wells, the location of the filter and The length is also not determined according to the calculation formula for the value of “K”, resulting in a pumping test result that fails to select the proper calculation of the “K” value.