Aolian Sandstones
Aolian Sandstones are characterised by large scale (10’s m) dune deposits comprising cross-bedding separated by bounding surfaces. In cases of extreme aridity evaporitic beds form from Gypsum or Anhydrite and in extreme cases, can form caves as seen in Qatar.
Matrix Porosity
The Challenge: The combined nuclear magnetic resonance tool (NMR /CMR). Elemental Capture Spectroscopy, provide an excellent means to measure porosity and the elemental composition of the lithology, especially identifying anhydrite which can mask the log data and block pores.
Cross-Bedding
The Challenge: Characteristic of aeolian facies is the packages of sand dunes and interdunes. Cross bedding preserved in the lee side of the dune allows reconstuction of the orientation of dune migration.
Gypsum Caves
Caves in the Qatari desert at Umm al Shabrum. Gypsum in the Rus Formation has been dissolved due to raised ground waters
Aeolian Reservoir Characterization Regional Study.
1-8 weeks
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