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Title: The Combined Use of Heat-pulse Flowmeter Logging and Packer Testing for Transmissive Fracture Recognition
Authors: Hung-Chieh Lo
Po-Jui Chen
Po-Yi Chou
Shih-Meng Hsu
Contributors: 國立臺灣海洋大學:河海工程學系
Keywords: Fracture transmissivity
Heat-pulse flowmeter
Packer test
Date: 2014-06
Issue Date: 2019-01-03T07:52:31Z
Publisher: Journal of Applied Geophysics
Abstract: Abstract: This paper presents an improved borehole prospecting methodology based on a combination of techniques in the hydrogeological characterization of fractured rock aquifers. The approach is demonstrated by on-site tests carried out in the Hoshe Experimental Forest site and the Tailuge National Park, Taiwan. Borehole televiewer logs are used to obtain fracture location and distribution along boreholes. The heat-pulse flow meter log is used to measure vertical velocity flow profiles which can be analyzed to estimate fracture transmissivity and to indicate hydraulic connectivity between fractures. Double-packer hydraulic tests are performed to determine the rock mass transmissivity. The computer program FLASH is used to analyze the data from the flowmeter logs. The FLASH program is confirmed as a useful tool which quantitatively predicts the fracture transmissivity in comparison to the hydraulic properties obtained from packer tests. The location of conductive fractures and their transmissivity is identified, after which the preferential flow paths through the fracture network are precisely delineated from a cross-borehole test. The results provide robust confirmation of the use of combined flowmeter and packer methods in the characterization of fractured-rock aquifers, particularly in reference to the investigation of groundwater resource and contaminant transport dynamics.
Relation: 105 pp.248-258
Appears in Collections:[Department of Harbor and River Engineering] Periodical Articles

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