The Permian Rotliegend reservoir architecture of the Dutch Koekoekspolder geothermal doublet
conference paper
The Dutch Koekoekspolder geothermal doublet was drilled in 2011 targeting the Permian Rotliegendreservoir. The encountered reservoir properties were less favorable than expected pre-drill. Post-drill integrated evaluation of vintage data and the new data from the geothermal wells resulted in a refined depositional model of the area. The Rotliegend sediments comprise predominantly horizontally, bimodally laminated fine to coarse grained red sandstones. These sediments were deposited on an aeolian sandflat. On this sandflat in the relative low-lying areas, coinciding with palaeo-lows of the pre-Permian palaeotopgraphy gypscretes were formed. These gypscretes were periodically exhumed and (partly) eroded providing gypsum grains which were subsequently incorporated in the predominant quartz rich sand sediments on the sandflat forming the typical bimodally laminated Aeolian deposits. The gypscretes are now present as pervasively anhydrite cemented horizons haphazardly vertically distributed.
Topics
TNO Identifier
505063
Source title
76th Eage Conference and Exhibition, 16-19 June 2014, Amsterdam, The Netherlands
Pages
1-5
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