You are here:
BOREHOLE FLOWMETERS: FIELD APPLICATION AND DATA ANALYSIS
Citation:
Molz, F., G. Boman, S. Young, AND W. Waldrop. BOREHOLE FLOWMETERS: FIELD APPLICATION AND DATA ANALYSIS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-95/208.
Description:
This paper reviews application of borehole flowmeters in granular and fractured rocks. asic data obtained in the field are the ambient flow log and the pumping-induced flow log. hese basic logs may then be used to calculate other quantities of interest. he paper describes the applications of the Tennessee Valley Authority (TVA) electromagnetic (EM) flowmeter in a granular medium. n an attempt to ascertain the effect of formation disturbance on flowmeter readings, test wells were subjected to repeated periods of development using air lifting. etween the development periods, flowmeter tests were run. he results indicated that flowmeter data are not highly sensitive to formation disturbance in the near vicinity of a test well. vidence of changes in the natural (ambient) flow in the test well was attributed to high, variable rates of pumping by nearby chemical plants. n fractured media, flowmeters may be used to detect flow to or from individual fractures or fracture zones. n these applications, additional information in the form of caliper, televiewer and resistivity logs are useful. urther studies of the type described herein are warranted.