Electromagnetic Borehole Flowmeter (EBF) Testing at the Southwest Plume Test Pad

摘要

Multiple-well aquifer tests were recently conducted at the Southwest Plume Test Pad (SPTP) near the Burial Ground Complex (BGC) in accordance with the BGC Field Investigation Plan. The pumping tests were performed in the Upper Three Runs and Gordon aquifers in Febraury and March of 1999. The tests provide reliable estimates of horizontal conductivity averaged over aquifer thickness, and a relatively large horizontial zone of influence. Table 1 summarizes the results of WSRC (1999). To complement these results, Electromagnetic Borehole Flowmeter (EBF) testing was performed to determine the vertical variation of horizontial conductivity about the average determined from the conventional aquifer testing. This report introduces the borehole flowmeter concept and EBF instrument, summarizes field and calculation procedures, presents EBF test results for 3 SPTP wells, and provide recommendations for future application of the technology.