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abstracts:rudyswennen [2015/11/24 08:54] (current)
christian.heine created
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 +:!: Oral Presentation
 +====== The Ballik continental carbonate ``reservoir analogue`` characteristics and its rift related context ======
 +|Author(s): | Rudy Swennen | Earth & Environmental Sciences, KU Leuven, Celestijnenlaan 200E, B-3001 Heverlee, Belgium |
 +|:::        | Mehmet Özkul | Pamukkale University, Department of Geological Engineering,​ TR–20070 Denizli, Turkey|
 +|:::        | The TraRAS team | |
 +Geo-scientific interest in continental carbonates that formed in rift settings, that serve as “geological laboratories” has increased over the last few years, especially since the recent discoveries of giant oil fields (e.g. offshore Brazil; Beasley et al., 2010) in similar carbonate lithologies with comparable complex pore network structures. To understand the complex sedimentary architecture,​ the diagenetic overprint and the genesis of these carbonates one of the largest exposed continental carbonate settings in the world, occurring in the Ballik area (Denizli, SW Turkey) is being studied. This reservoir analogue was also studied from the reservoir and petrophysical perspective. ​  
 +The rift setting in the study area is reflected in the geomorphology of the landscape. The 3D geobody architecture at the sub-seismic scale (>4 by 2 km, and up to 70 m high vertical exposures) was obtained from  Lidar scanning and integration with line drawing made in over 30 different key walls in the non-active quarries. This was complemented by a 60m long borehole taken behind the quarry wall, as well as a 60m deep borehole drilled in the bottom of one of the key quarries. Based on these data the evolution of a subaqueous system locally with a thick non-carbonate intercalation into a subaerial system with clear aggradational and progradational characteristics of especially cascade and waterfall lithologies could be worked out. The relationship between continental carbonate and non-carbonate lithologies was unraveled by detailed mapping and its evolution was placed in the context of the rift setting. ​
 +The geochemistry (trace elements, Sr and stable C & O isotope analysis complemented with fluid inclusion micrometry) allowed us to constrain the origin of the fluid(s) involved as well as to propose a model documenting the large-scale fluid circulation patterns in the Denizli rift setting and its surroundings. ​ Carbonates of the underlying Lycian nappes likely served as the source for the Ca-rich waters, and the elevated sulphate content of these carbonates is linked to the dissolution of evaporites.  ​
 +Porosity and permeability data were collected on 1” & 1.5” plugs as well as on full cores (10cm diameter) from the different lithofacies. ​ These data were used to populate the different geobodies. ​ The pore networks were reconstructed based on computed tomography data.  NMR and MICP data complemented this reservoir characterisation and acoustic properties (V_p & V_s) of the different lithofacies allowed us to work out some first synthetic seismic profiles. Based on a geostatistical analysis of this dataset some reservoir simulations have been performed. ​