Pore water evolution in oilfield sandstones: constraints from oxygen isotope microanalyses of quartz cement

Carbonate cements in Miller field of the UK North Sea: a natural analog for mineral trapping in CO2 geological storage

“…The mineral composition of Brae Formation reservoir sandstone has been determined by point-count results (Marchand 2001;Marchand et al 2001Marchand et al , 2002. The Brae Formation consists mainly of fine-to coarse-grained quartzitic sandstones.…”

“…40 Ma. The presence of oil has retarded quartz overgrowth in the oil zone more than in the water zone (Marchand et al 2001(Marchand et al , 2002. CO 2 first entered the reservoir at *70 Ma, as suggested by carbonate carbon isotopes (Lu et al 2009).…”

“…Carbon isotopic composition of the CO 2 accumulation has likely remained constant since the initial charge. The oxygen isotope evolution in pore-water in the Miller reservoir was reconstructed by Marchand et al (2002). On the basis of oxygen isotope ratios in quartz cement and fluid-inclusion microthermometric data, it was suggested that pore-water was dominated by meteoric-type fluid through its early evolution until burial temperature of *70°C.…”

Evolution of quartz cementation during burial of the Cambrian Mount Simon Sandstone, Illinois Basin: In situ microanalysis of δ18O

“…Stable isotope ratios preserve evidence of fl uid-rock interactions, which can have a pronounced effect on the cementation of a rock. The oxygen isotope fractionation between quartz and water is large (~30‰ at 50 °C) and has been used to calculate temperatures of diagenesis and fl uid compositions (e.g., Longstaffe and Ayalon, 1987;Hervig et al, 1995;Graham et al, 1996;Williams et al, 1997;Lyon et al, 2000;Macaulay et al, 2000;Marchand et al, 2002;Kelly et al, 2007;Harwood et al, 2009). If analyzed at an appropriate scale, the spatial and temporal distribution of isotopically distinct cements can be used to investigate whether the history of a basin was dominated by varying fl uid composition or by burial heating, but most data have been measured at scales of millimeters to centimeters.…”

Origin of quartz cement in the Lower Ordovician Dongjeom formation, Korea

“…This cement is commonly well developed in mature, medium-to coarse-grained quartz arenites, typical of tectonically stable areas and, in particular, cratonic basins (Dickinson and Suczek, 1979;Blatt et al, 1980;Houseknecht, 1984). Understanding the origin and distribution of quartz cement is consequently of economic importance for reservoir quality prediction in oilfield sandstones (Marchand et al, 2002). Although quartz cementation has been studied extensively due to its importance, the origin of quartz cement and the mechanism of transport of silica to the site of precipitation have not been fully understood (Blatt, 1979;Land and Dutton, 1979;Bjørlykke, 1979Bjørlykke, , 1983Leder and Park, 1986;Dutton and Diggs, 1990;Girard and Deynoux, 1991;Worden and Morad, 2000).…”