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Lookup NU author(s): Professor Andrew Aplin
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We combine microstructural, mineralogical and pore network data to identify the key processes of compaction in a series of Gulf of Mexico mudstones buried to depths between 1.5 and 6 km. Mechanical compaction reduces mudstone porosities to 15% and permeabilities to 2-10 nD, without the development of a strongly aligned phyllosilicate fabric. The conversion of smectite to illite in the very hottest section has resulted in the development of a modestly aligned fabric, with an apparently related reduction in porosity and permeability. The results have implications both for the basic physical properties of mudstones (mechanical strength, seismic and permeability anisotropy) and for the way in which we model compaction and fluid flow in sedimentary basins. (C) 2003 Elsevier Science B.V. All rights reserved.
Author(s): Aplin AC, Matenaar IF, van der Pluijm B
Publication type: Article
Publication status: Published
Journal: Journal of Geochemical Exploration
ISSN (print): 0375-6742
Notes: Proceedings of Geofluids IV, Utrecht, The Netherlands, 12-16 May 2003
Edited by Verweij JM; Doust H; Peach CJ, Spiers CJ; Swennen RAJ
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