Sedimentary heterogeneity and petrophysical characterization of Barremian tsunami and barrier island/inlet deposits: The Aliaga outcrop as a reservoir analogue (Galve sub-basin, eastern Spain)

Abstract

The present study examined two sandstone deposits in the Aliaga outcrop as a reservoir analogue over a distance of 200-m-long and attempted to establish a correlation between sand facies and the petrophysical properties of the sandstones in order to investigate the reservoir heterogeneity. The Aliaga reservoir analogue represents the upper part of Camarillas Fm., deposited during the Barremian synrift phase of the Galve sub-basin (Iberian Basin, Spain). It is characterized by a transitional sedimentary interval from sandy-dominant deposits to carbonate-dominant deposits, which were deposited under the same palaeoenvironmental conditions (in relation to systems of back-barrier sedimentation). The description of the Aliaga outcrop provided here consists of lithological descriptions of two sandstone deposits: a tsunami and a barrier island/inlet, at both mesoscopic (decimeters to tens of meters) and microscopic scales (millimeters to centimeters). Both deposits recognized at the basin scale were described in terms of sand grain size, sand sorting and

Outcrop scale reservoir characterisation and flow modelling of CO2 injection in the tsunami and the barrier island—Tidal inlet reservoirs of the Camarillas Fm. (Galve sub-basin, Teruel, NE Spain)

“…10). Veloso et al (2016) showed the good correlation between the measured porosity and the sorting and cement facies (Fig. 11); facies were classified based on petrophysical characteristics determined from 27 plugs.…”

“…The distribution of permeability and porosity values is strongly correlated with the facies distribution, principally in the b.i./inlet deposit, which were classified as a function of the sand sorting and cemented content. Thus, the spatial distribution of petrophysics values is controlled by the geometry of the depositional facies and the degree of continuity of sand bodies (Ambrose et al, 2008, Veloso et al, 2016.…”

“…The classification used for the mineralogical analyses was based on that of Pettijohn (1973). Veloso et al (2016) classified lithofacies as function of sand sorting and cement content. The analysis showed the good correlation between facies and petrophysics distributions, principally in the b.i./inlet deposit.…”

“…The tsunami deposit has a homogenous distribution of facies with 70% of the samples belonging to the Well sorted (WSs) and Moderate sorted (MSs) sandstones, independent of the great variation in grain size (Veloso et al, 2016). The tsunami porosity ( Fig.…”