-
oa Reactive Transport Models of Structurally Controlled Hydrothermal Dolomite:<br>Implications for Middle East Carbonate Reservoirs
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, GEO 2010, Mar 2010, cp-248-00452
Abstract
Hydrothermal dolomitization is present in several Middle East carbonate reservoirs including Ghawar,<br>the North Field and South Pars. Structurally controlled hydrothermal dolomitization describes the<br>replacement of limestone with dolomite and/or the precipitation of dolomite cement and associated<br>MVT minerals (anhydrite, sulfides, quartz and fluorite) as a consequence of subsurface brines that<br>ascend upwards through fault and fracture systems. This fluid rock interaction in the burial<br>environment has the potential to both improve and/or degrade reservoir quality depending on the<br>properties of the host rock, fluid composition, timing of fluid flow and spatial position relative to<br>structure.