Influence of a major exposure surface on the development of microporous micritic limestones - Example of the Upper Mishrif Formation (Cenomanian) of the Middle East

Comparison of the diagenetic and reservoir quality evolution between the anticline crest and flank of an Upper Jurassic carbonate gas reservoir, Abu Dhabi, United Arab Emirates

“…Hence, this type of calcite is suggested to be sourced by stylolitization after gas emplacement in the crest. Moreover, the flank presumably contains only micropores because macropores are more readily cemented than micropores (Ehrenberg and Walderhaug et al, 2015;Deville De Periere et al, 2017). (Epstein, 1959).…”

Sequence Stratigraphy, Palaeogeography and Petroleum Plays of the Cenomanian – Turonian Succession of the Arabian Plate: An Updated Synthesis

“…The following factors should be important when considering karst and its impact upon reservoir quality: duration of exposure; relief; magnitude of relative sea-level change; nature of the exposed substrate; climate; depth to water table; the presence and fill of incised valleys (e.g. sand or shale); clay infiltration of caves, fissures and dolines; grain mineralogy and propensity to dissolution (aragonite vs high Mg vs low Mg calcite allochems); differential cementation; salt movement; and whether soils or coaly swamps are present (Burchette and Britton, 1995;Grelaud et al, 2006Grelaud et al, , 2010Ghabeishavi et al, 2009;Cross et al, 2010;Sharp et al, 2010;Burchette et al, 2010;Hollis, 2011;Deville de Periere et al, 2017;Assadi et al, 2018;Xiao et al, 2020).…”

“…The most significant karstified surface is the composite mid-Turonian unconformity (K150 SB) which resulted from tectonic uplift and a relatively long duration of exposure (up to 3 Ma) across a highly variable topographic profile. This surface is recognized regionally and is associated with dissolution features, vugs and brecciated cavities, vadose cements, dolines, paleosols, bauxites, incised channels and channel fills at various locations across the southern part of the Arabian Plate (Videtich et al, 1988;Burchette andBritton, 1995, Jordan et al, 1995;Botton-Dumay et al, 2002;Droste and Van Steenwinkel, 2004;Zarasvandi et al, 2008;Sharp et al, 2010;Hollis, 2011;Deville de Periere et al, 2017;Assadi et al, 2018).…”

Diagenetic evolution of fault zones in Urgonian microporous carbonates, impact on reservoir properties (Provence – SE France)

“…Microporous carbonates form important reservoir (Deville de Periere et al, 2017;Lambert et al, 2006;Sallier, 2005;Volery et al, 2009) with porosities up to 35% (Deville de Periere et al, 2011). However, they have heterogeneous properties depending on sedimentary, structural and diagenetic factors, inducing high variability of the reservoir permeability (Bruna et al, 2015;Deville de Periere et al, 2011Eltom et al, 2018;Florida et al, 2009;Hollis et al, 2010).…”

“…Because of their hydraulic properties, fault zones, including fracture network and fault core, influence the fluid flows in the upper part of Earth crust (Bense et al, 2013;Evans et al, 1997;Knipe, 1993;Sibson, 1994;Zhang et al, 2008) and increase the fluids-rock interaction. Carbonates are very sensitive to these fluids-rock interactions that lead to secondary processes like cementation and dissolution (Deville de Periere et al, 2017;Fournier and Borgomano, 2009;Lambert et al, 2006). Fault zones related diagenetic processes locally modifying the initial rock properties (mineralogy and porosity) and therefore their reservoir properties (Hodson et al, 2016;Knipe, 1993;Knipe et al, 1998;Laubach et al, 2010;Woodcock et al, 2007).…”