Reservoir Rock an overview | ScienceDirect Topics
The reservoir rock of giant fields is about 61 percent sandstone worldwide, or about 80 percent excluding the Middle East. Carbonate reservoirs account for about 40 percent of giant reserves, mainly from the Middle East (Fig. 1215).These carbonate reservoirs are about equally divided between the primary depositional clastic porosity of limestones and the secondary porosity of latestage ...