Statistics – Methodology
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985esrv...22..261m&link_type=abstract
Earth Science Reviews, Volume 22, Issue 4, p. 261-308.
Statistics
Methodology
122
Scientific paper
Existing methods of facies analysis for fluvial deposits rely extensively on vertical profile analysis and comparisons with a limited array of fixed “end member” facies models. However, vertical profiles are not sufficiently diagnostic for this purpose because they cannot adequately represent three-dimensional variations in composition and geometry. A new method of analysis is proposed which subdivides fluvial deposits into local suites consisting of one or more of a set of eight basic three-dimensional architectural elements. These are channels, gravel bars and bedforms, sandy bedforms, foreset macroforms, lateral accretion deposits, sediment gravity flow deposits, laminated sand sheets and overbank fines. Twelve fluvial styles are selected to illustrate possible combinations of these elements. It is suggested that the same methodology could be used for other clastic facies. The better documentation of three-dimensional facies variability that can be obtained should be of considerable use in interpreting sedimentary controls and in carrying out petroleum field development, reservoir engineering or ore grade studies.
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