Carbonates make up about half of the sedimentary rock in the Western Canada Sedimentary Basin (WCSB) and range from Cambrian to early Jurassic in geologic age. Large oil and gas reserves exist in Devonian and Early Carboniferous carbonate formations. Middle and Upper Devonian carbonate rocks alone have known reserve of about 15 billion barrels of oil and 35 trillion cubic feet of natural gas. A variety of carbonate reservoirs exist in the WCSB, mostly reef and platform types. These reservoirs are formed by porous limestones or platforms that were dolomitized prior to basin-wide hydro-carbon maturation and migration. Fractured reservoirs were...

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