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Hydraulic well testing has been the primary means for hydrogeological characterization in fractured crystalline rocks, for the purpose of geological disposal of nuclear wastes. This report has demonstrated that the conventional well test interpretation techniques in both hydrogeology and hydrocarbon reservoirs are not adequate. The main characteristic of a well test conducted in fractured crystalline rock is unknown flow geometry. The proposed interpretation method does not require pre-assumption about flow geometry. The flow geometry is an output from such interpretation, and is quantified by flow dimension.
Much of the project has concentrated on understanding the dimensional behaviour of fracture networks. This report details numerous numerical simulations of synthetic well tests in single fractures, channelized fractures, simple multiple-fracture systems, and randomly generated fracture networks. From this study, a number of important characteristics of flow dimension in a fractured rock have been identified. Three approaches are then proposed to incorporate this dimensional information into the flow and transport simulators using the discrete fracture network modelling approach.

Additional information

Authors: WEI L, Golder Associates, Nottingham (GB);CHAKRABARTY C, Golder Associates, Nottingham (GB)
Bibliographic Reference: EUR 16926 EN (1996) 242pp., FS, ECU 26.50
Availability: Available from the (2)
ISBN: ISBN 92-827-7458-9; ISSN
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