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Iraq petroleum geology (view source)

Revision as of 15:34, 19 May 2016

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|+ {{table number|2}}List of oil and gas fields and wells with oil and/or gas shows. Field number refers to locations shown in [[:file:M106Ch12Fig03.jpg|Figure 3]]. Structural province refers to regions shown in [[:file:M106Ch12Fig03.jpg|Figure 3]]. Source name and age given only where proven by biomarkers. Volumes of oil and gas in-place, estimated ultimate recoverable (EUR), produced, and remaining ultimate recoverable (RUR) age given in millions of barrels of oil (MMBO) and billions of cubic feet of gas (BCFG). Condensate included in oil volumes. Information mainly from Verma et al.<ref name=Vermaetal_2004 /> and Jassim and Goff.<ref name=Jassimandgoff_2006 /> Additional references as shown. Comments reflect the impression of the author.
 
|+ {{table number|2}}List of oil and gas fields and wells with oil and/or gas shows. Field number refers to locations shown in [[:file:M106Ch12Fig03.jpg|Figure 3]]. Structural province refers to regions shown in [[:file:M106Ch12Fig03.jpg|Figure 3]]. Source name and age given only where proven by biomarkers. Volumes of oil and gas in-place, estimated ultimate recoverable (EUR), produced, and remaining ultimate recoverable (RUR) age given in millions of barrels of oil (MMBO) and billions of cubic feet of gas (BCFG). Condensate included in oil volumes. Information mainly from Verma et al.<ref name=Vermaetal_2004 /> and Jassim and Goff.<ref name=Jassimandgoff_2006 /> Additional references as shown. Comments reflect the impression of the author.
 
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| Field # || Field name || Hydrocarbon type || Structural province || Structural style || Trap type || Source name and age || Source strata type || In-place MMBO || In-place BCFG || EUR (Proved) MMBO || EUR (Proved) BCFG || Produced MMBO || Produced BCFG || RUR MMBO || RUR BCFG || Reference || Comments
+
! Field # || Field name || Hydrocarbon type || Structural province || Structural style || Trap type || Source name and age || Source strata type || In-place MMBO || In-place BCFG || EUR (Proved) MMBO || EUR (Proved) BCFG || Produced MMBO || Produced BCFG || RUR MMBO || RUR BCFG || Reference || Comments
 
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| 5 || Abtakh || Oil || Zagros Foldbelt ||  || Anticline ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  || Show
 
| 5 || Abtakh || Oil || Zagros Foldbelt ||  || Anticline ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  || Show
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| 66 || Nafatah || Oil || Mesopotamian Foredeep ||  || Anticline ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  || Show
 
| 66 || Nafatah || Oil || Mesopotamian Foredeep ||  || Anticline ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  ||  || Show
 
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|-
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| 59 || Naft Knaneh | Oil & gas || Zagros Foldbelt || Detached fold-thrust || Anticline ||  ||  ||  ||  || 430 || 340 || 114 || 99 || 316 || 241 ||  ||
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| 59 || Naft Knaneh || Oil & gas || Zagros Foldbelt || Detached fold-thrust || Anticline ||  ||  ||  ||  || 430 || 340 || 114 || 99 || 316 || 241 ||  ||
 
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| 99 || Nahr Umr/Bin Umar || Oil & gas || Gotnia Basin || Salt-supported dome || Faulted Dome ||  ||  ||  ||  || 6500 || 9900 ||  ||  ||  ||  ||  ||
 
| 99 || Nahr Umr/Bin Umar || Oil & gas || Gotnia Basin || Salt-supported dome || Faulted Dome ||  ||  ||  ||  || 6500 || 9900 ||  ||  ||  ||  ||  ||
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| 30 || Taq Taq || Oil & gas || Zagros Foldbelt || Detached fold-thrust || Anticline || Mixed Balambo/Naokelekan || Basinal marine || 600 ||  || 130 || 100 ||  ||  ||  ||  || www.stockhoouse.com || Low to IP
 
| 30 || Taq Taq || Oil & gas || Zagros Foldbelt || Detached fold-thrust || Anticline || Mixed Balambo/Naokelekan || Basinal marine || 600 ||  || 130 || 100 ||  ||  ||  ||  || www.stockhoouse.com || Low to IP
 
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| 1 || Tawke || Oil || Zagros Foldbelt || Detached fold-thrust || Anticline || Naokelekan || Basinal arine | 1300 ||  || 230 || 0 || 1 ||  || 229 ||  || DNO 18/12/08 ||
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| 1 || Tawke || Oil || Zagros Foldbelt || Detached fold-thrust || Anticline || Naokelekan || Basinal marine || 1300 ||  || 230 || 0 || 1 ||  || 229 ||  || DNO 18/12/08 ||
 
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| 61 || Tel Ghazal || Gas || Zagros Foldbelt || Detached fold-thrust || Anticline ||  ||  ||  ||  || 0 || 900 ||  ||  ||  ||  ||  ||  
 
| 61 || Tel Ghazal || Gas || Zagros Foldbelt || Detached fold-thrust || Anticline ||  ||  ||  ||  || 0 || 900 ||  ||  ||  ||  ||  ||  
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To date, about 25 gbo and 11 tcfg have been produced from about 23 fields. The most has been from the Kirkuk (about 14 gbo) and Rumaila (about 8 gbo) fields.
 
To date, about 25 gbo and 11 tcfg have been produced from about 23 fields. The most has been from the Kirkuk (about 14 gbo) and Rumaila (about 8 gbo) fields.
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{| class = "wikitable"
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|+ {{table number|3}}List of reservoir name, age, and strata type, and seal name and strata type, for fields that have produced oil and gas. Alternative or old reservoir names provided in comments column. Field number refers to locations shown in [[:file:M106Ch12Fig03.jpg|Figure 3]].
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! Age Sort || Field # || Field Name || Reservoir Name || Reservoir Age || Reservoir Strata Type || Seal Name || Seal Strata Type || Comments
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|-
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| 15 || 78 || Abu Ghirab || Jeribe/Euphrates/Kirkuk || Miocene-Oligocene || Carbonate || Fatha || Evaporite ||
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|-
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| 44 || 78 || Abu Ghirab || Mishrif || Late Cretaceous || Carbonate || Khasib || Arg limestone ||
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|-
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| 46 || 78 || Abu Ghirab || Mauddud || Early Cretaceous || Carbonate || Ahmadi || Shale ||
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|-
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| 40 || 6 || Ain Zalah || Shiranish || Late Cretaceous || Carbonate || Aaliji || Shale || "First Pay"
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|-
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| 42 || 6 || Ain Zalah || Mushorah/Qamchuqa || Late Cretaceous || Carbonate || Shiranish || Arg limestone || "Second Pay"
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|-
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| 10 || 45 || Ajil || Fatha || Miocene || Carbonate || Fatha || Evaporite ||
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|-
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| 13 || 45 || Ajil || Jeribe/Dhiban || Miocene || Carbonate || Fatha || Evaporite ||
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|-
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| 20 || 45 || Ajil || Euphrates || Oligocene || Carbonate || Dhiban || Evaporite ||
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|-
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| 52 || 45 || Ajil || Chia Gara || Early Cretaceous-Late Jurassic || Carbonate || Ratawi || Shale ||
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|-
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| 55 || 45 || Ajil || Gotnia || Late Jurassic || Carbonate || Gotnia || Evaporite ||
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|-
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| 60 || 45 || Ajil || Sargelu || Middle Jurassic || Carbonate || Naokelekan || Arg limestone ||
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|-
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| 12 || 34 || Bai Hassan || Jeribe/Kirkuk Group/Jaddala || Miocene-Oligocene-Eocene || Carbonate || Fatha || Evaporite ||
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|-
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| 40 || 34 || Bai Hassan || Shiranish || Late Cretaceous || Carbonate || Aaliji || Shale ||
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|-
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| 43 || 34 || Bai Hassan || Lower Kimetan || Late Cretaceous || Carbonate || Upper Kometan || Arg limestone ||
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|-
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| 46 || 34 || Bai Hassan || Mauddud || Early Cretaceous || Carbonate || Dokan || Arg limestone ||
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|-
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| 48 || 34 || Bai Hassan || Shuaiba || Early Cretaceous || Carbonate || Upper Sarmord || Arg limestone ||
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|-
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| 41 || 62 || Balad || Hartha/Sadi || Late Cretaceous || Carbonate || Upper Hartha || Arg limestone ||
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|-
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| 43 || 62 || Balad || Khasib || Late Cretaceous || Carbonate || Tanuma || Shale ||
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|-
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| 47 || 62 || Balad || Nahr Umr || Early Cretaceous || Sandstone || Nahr Umr || Shale ||
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|-
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| 52 || 62 || Balad || Chia Gara || Early Cretaceous-Late Jurassic || Carbonate || Ratawi || Shale ||
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|-
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| 64 || 62 || Balad || Alan || Early Jurassic || Carbonate || Alan || Evaporite-Shale ||
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|-
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| 40 || 11 || Butmah || Shiranish || Late Cretaceous || Carbonate || Aaliji || Shale || "First Pay"
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|-
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| 70 || 11 || Butmah || Kurra Chine/Geli Khana || Late Triassic || Carbonate || Kurra Chine || Arg limestone & anhydrite || "Triassic Pay"
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|-
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| 12 || 80 || Buzurgan || Jeribe/Kirkuk Group || Miocene-Oligocene || Carbonate || Fatha || Evaporite ||
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|-
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| 44 || 80 || Buzurgan || Mishrif || Late Cretaceous || Carbonate || Khasib || Arg limestone ||
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|-
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| 10 || 52 || Chia Surkh || Fatha || Miocene || Carbonate || Fatha || Evaporite ||
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|-
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| 12 || 52 || Chia Surkh || Jeribe || Miocene || Carbonate || Fatha || Evaporite ||
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|-
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| 10 || 63 || East Baghdad || Jeribe/Euphrates || Miocene-Oligocene || Carbonate || Fatha || Evaporite ||
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|-
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|}
    
The major reservoirs in Iraq are Cretaceous, and these are the main reservoirs in 69 discoveries. The recoverable reserves in Cretaceous reservoirs in all fields are estimated to be between 59 and 101 gbo and 15 to 55 tcfg. Similar, there are 32 discoveries with mainly Cenozoic reservoirs, with 24–46 gbo and 14–41 tcfg recoverable in all Cenozoic reservoirs. Only 10 discoveries are mainly in Triassic reservoirs, with recoverable reserves of 400–500 mbo and up to 6 tcfg, and three discoveries mainly from Jurassic reservoirs, with 580–1500 mbo and no gas. Estimates of up to 6 tcfg of gas occur in the Paleozoic at Akkas field, with shows in Khleisia 1.
 
The major reservoirs in Iraq are Cretaceous, and these are the main reservoirs in 69 discoveries. The recoverable reserves in Cretaceous reservoirs in all fields are estimated to be between 59 and 101 gbo and 15 to 55 tcfg. Similar, there are 32 discoveries with mainly Cenozoic reservoirs, with 24–46 gbo and 14–41 tcfg recoverable in all Cenozoic reservoirs. Only 10 discoveries are mainly in Triassic reservoirs, with recoverable reserves of 400–500 mbo and up to 6 tcfg, and three discoveries mainly from Jurassic reservoirs, with 580–1500 mbo and no gas. Estimates of up to 6 tcfg of gas occur in the Paleozoic at Akkas field, with shows in Khleisia 1.
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