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Matching a field tracer test with some simple models
Author(s) -
Bullivant D. P.,
O'sullivan M. J.
Publication year - 1989
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr025i008p01879
Subject(s) - tracer , geothermal gradient , matrix (chemical analysis) , geology , transient (computer programming) , dispersion (optics) , geotechnical engineering , field (mathematics) , porosity , flow (mathematics) , mechanics , simple (philosophy) , matching (statistics) , diffusion , petroleum engineering , materials science , mathematics , computer science , geophysics , physics , statistics , thermodynamics , optics , philosophy , epistemology , nuclear physics , pure mathematics , composite material , operating system
Simple models of fluid flow and dispersion in a porous rock matrix are compared and used to match the results of tracer tests at the Wairakei (New Zealand) geothermal field. It is found that models which allow transient diffusion from fractures into the surrounding rock matrix give a better match to test results than either a model which allows only longitudinal dispersion or a pseudo steady state double porosity model. For some tests a model which includes two fractures is required to match the field data.