TY - GEN
T1 - New insights on the characterisation of the pyroclastic-rich bajo barreal fluvial reservoir (Argentina)
AU - Moscariello, A.
AU - Šegvić, B.
AU - Lehu, R.
AU - Pedersen, G.
AU - Gonus, J.
AU - Arbiol González, C.
AU - Limeres, A.
AU - Bernhardt, C.
AU - Perez, D.
AU - Thompson, A.
AU - Dandrea, F.
AU - Ancheta, D.
AU - Saccomano, A.
AU - Vocaturo, G.
AU - Sallier, B.
AU - Massaferro, J.
AU - Morettini, E.
PY - 2016
Y1 - 2016
N2 - The Cretaceous fluvio-lacustrine Bajo Barreal Formation, known for its large hydrocarbon accumulations, consists of a 1) Lower Member made of floodplain mudstones with isolated channels with an upward increase of sandstone content, and an 2)Upper Member composed by grey and purple mudstones with thicker channel sand bodies. Both stratigraphical units are characterised by the presence of acid volcanoclastics and tuffaceous material mixed with siliciclastic sediments. Previous studies on the Bajo Barreal Formation suggest an active sedimentary input from contemporaneous volcanoclastic material derived from both direct fall-outs or rain-off processes. This material can make up to 15% of host rocks forming a so-called pseudomatrix produced by the disintegration of tuff and d pyroclastic material. In this contribution we present the preliminary results on the reservoir petrography and mineralogy focusing on the characterisation of its volcanic component and related neo-formed mineralization especially considering the clay and zeolite pore infill. The identification of key petrographically distinct stratigraphic units and the detailed quantification of their mineralogical composition (i.e. clay and zeolite content) has an important impact on characterisation of pore-filling material, porosity calculation from density-based wire-line log and the stratigraphic distribution of reservoir properties and hence definition of flow units.
AB - The Cretaceous fluvio-lacustrine Bajo Barreal Formation, known for its large hydrocarbon accumulations, consists of a 1) Lower Member made of floodplain mudstones with isolated channels with an upward increase of sandstone content, and an 2)Upper Member composed by grey and purple mudstones with thicker channel sand bodies. Both stratigraphical units are characterised by the presence of acid volcanoclastics and tuffaceous material mixed with siliciclastic sediments. Previous studies on the Bajo Barreal Formation suggest an active sedimentary input from contemporaneous volcanoclastic material derived from both direct fall-outs or rain-off processes. This material can make up to 15% of host rocks forming a so-called pseudomatrix produced by the disintegration of tuff and d pyroclastic material. In this contribution we present the preliminary results on the reservoir petrography and mineralogy focusing on the characterisation of its volcanic component and related neo-formed mineralization especially considering the clay and zeolite pore infill. The identification of key petrographically distinct stratigraphic units and the detailed quantification of their mineralogical composition (i.e. clay and zeolite content) has an important impact on characterisation of pore-filling material, porosity calculation from density-based wire-line log and the stratigraphic distribution of reservoir properties and hence definition of flow units.
UR - http://www.scopus.com/inward/record.url?scp=85088200556&partnerID=8YFLogxK
U2 - 10.3997/2214-4609.201600600
DO - 10.3997/2214-4609.201600600
M3 - Conference contribution
AN - SCOPUS:85088200556
T3 - 78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential
BT - 78th EAGE Conference and Exhibition 2016
PB - European Association of Geoscientists and Engineers, EAGE
T2 - 78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential
Y2 - 30 May 2016 through 2 June 2016
ER -