Arabian Journal of Geosciences

, Volume 4, Issue 1–2, pp 53–58 | Cite as

Hydrocarbon generation potential of the uppermost Jurassic—basal Cretaceous Sulaiy formation, South Iraq

  • Thamer Khazaal Al-Ameri
  • Furat Ata’a Al-Musawi
Original Paper

Abstract

Organic geochemical analysis, palynology, and PetroMod software for the organic matters of subsurface Tithonian to Valanginian Sulaiy formation of six wells in Basrah Region, South Iraq showed evidences for hydrocarbon generation potential. These analyses include quantitative studies such as pyrolysis, fluorescence spectroscopy, and total organic carbon (TOC), while the qualitative studies are the textural microscopy used in evaluating amorphous organic matter for palynofacies analysis leading to hydrocarbon assessments. High TOC content of up to 7.3 wt.%, kerogen type II of mesoliptinic type with hydrogen index of up to 466 mg HC/g TOC, and mature organic matter along with dysoxic–anoxic environment and stratigraphic framework have rated the succession as a source rock for oil with ordinate gas, not only in Iraq but also in neighboring Kuwait and Saudi Arabia. This case study is also inferred for hydrocarbon generation and expulsion by PetroMod software which confirmed the source potential.

Keywords

Sulaiy formation South Iraq Hydrocarbon generation Upper jurassic–lower cretaceous 

قدرة نشوء الهيدروكاربونات لتكوين السلي الجوراسي الاعلى- الكريتاسي الاسفل في جنوب العراق

الخلاصة

لقد اظهرت تحليلات الجيوكيمياء العضوية والبالينولوجية والبرمجة الحاسوبية للمواد العضوية في تكوين السلي الممتد عمراً بين التيثوني والفالانجيني لستة آبار في محافظة البصرة في جنوب العراق أدلة لقدرة نشوء الهيدروكاربونات. شملت هذه التحليلات دراسات كمية مثل البيروليسيس والطيف الفلورسيني واجمالي المواد العضوية، بينما شملت الدراسات النوعية استعمال التراكيب المجهرية في تقييم المواد العضوية العديمة الشكل التركيبي ضمن السحنات البالينولوجية المؤدية الى تحديد الهيدروكاربونات. لقد تم اعتبار التعاقبات الطبقية لتكوين السلي صخوراً مصدرية للنفط وبعضاً من الغاز اعتماداً على الكمية العالية لاجمالي المواد العضوية حتى 3 ،7% وزناً وكيروجين النوع الثاني الغني بالليبيد ومؤشر الهيدروجين الذي يصل الى 466 ملغم هيدروكاربون لكل غرام اجمالي المادة العضوية ومواداً عضوية ناضجة وبيئة انعدام التهوية والهيكلية الطبقية، ليس في العراق فقط ولكن في الدول المجاورة الكويت والمملكة العربية السعودية. لقد تم التأكد من نشوء الهيدروكاربونات واندفاعها من تكوين السلي لمناطق التجميع بواسطة البرنامج الحاسوبي البيترومود.

References

  1. Beydhoun ZR (1991) Arabian plate hydrocarbon geology and potential, a plate tectonic approach. Am Assoc Pet Geol Stud Geol 33:70Google Scholar
  2. Al-Ameri TK, Al-Musawi FA, Batten DJ (1999) Palynofacies and source potential for hydrocarbon, uppermost Jurassic-basal Cretaceous in Sulaiy formation, southern Iraq. Cretac Res 20:359–363CrossRefGoogle Scholar
  3. Al-Sharhan AS, Nairn AEM (1997) Sedimentary basins and petroleum geology. Elsevier, Holland, p 943Google Scholar
  4. Batten DJ (1996) Palynofacies and petroleum potential. In: Jansonius J, McGregore DC (eds) Palynology: Principles and Application, vol 3. American Association of Stratigraphic Palynologists Foundation, Dallas, pp 1065–1084Google Scholar
  5. van Bellen RC, Dunnington HV, Wetzel R, Morton DM (1959) Lexique stratigraphquie international, vol III, Asie, Fasicule 10a Iraq. Centre National de la Recherche Scientifique, Paris 333 ppGoogle Scholar
  6. Brooks J (1981) Organic maturation studies and fossil fuel exploration. Academic, London, p 360Google Scholar
  7. Bujack JP, Bars MS, Williams GL (1977) Offshore east Canadas organic types and colors and hydrocarbon potential. Oil Gas J 75:96–100Google Scholar
  8. Claypool G, Peters K, Wildharber J (1994) Exploration Geochemistry Reference Guide. MEPTEC, Medicine Park Project BK4WAA10, 8 pp, 7 tables, and 6 figuresGoogle Scholar
  9. Dumke U, Teschner M (1987) Application of fluorescence spectroscopy to geochemical correlation problems. Advances in Organic Geochemistry 13:1067–1072CrossRefGoogle Scholar
  10. Durand B (1980) Sedimentary organic matter and Kerogen. In: Durand B (ed) Kerogen: insoluble organic matter from sedimentary rocks. Edition Technip, Paris, p 450Google Scholar
  11. Hunt JM (1996) Petroleum geochemistry and geology, second edition. Freeman, New York, p 743Google Scholar
  12. Lewan MD, Ruble TE (2002) Comparison of petroleum generation kinetic by isothermal kinetic and non isothermal open systempyrolysis. Org Geochem 33:1457–1475CrossRefGoogle Scholar
  13. Peters KE (1986) Guidelines for evaluating petroleum source rock using programmed pyrolysis. Am Assoc Pet Geol Bull 70:318–329Google Scholar
  14. Pitman JK, Stenshouer D, Lewan MD (2004) Petroleum generation and migration in the Mesopotamian Basin and Zagrous Fold Belt of Iraq: results from a basin-modeling study. Geo Arabia 9(4):41–72Google Scholar
  15. Pollastro RM, Karshbaum AS, Viger RG (1999) Map showing geology, oil and gas fields, and geologic provinces of the Arabian Peninsula. US Geological Survey, Washington, DC Open File Report 97-470B Version 2Google Scholar
  16. Rahman M, Kinghorn RRF (1995) A practical classification of kerogen related to hydrocarbon generation. J Pet Geol 18:91–102CrossRefGoogle Scholar
  17. Rulkotter JP (1987) Geochemistry, Organic. Encycl Phys Sci Technol 6:53–77Google Scholar
  18. Sharland PR, Archer R, Cassey DM, Davies RB, Hall SH, Heward AP, Horbery AD, Simmons MD (2001) Arabian Plate Sequence Stratigraphy. Gulf PetroLink, Bahrain 371 ppGoogle Scholar
  19. Staplin FL (1969) Sedimentary organic matter, organic metamorphism, and oil and gas occurrences. Bulletin of Canadian Petroleum Geology 17:47–66Google Scholar
  20. Thompson CL, Dembicki H Jr (1986) Optical characteristics of amorphous kerogens and the hydrocarbon-generation potential of source rocks. Int J Coal Geol 6:229–249CrossRefGoogle Scholar
  21. Tissot B, Welte DW (1984) Petroleum formation and occurrence, 2nd ed. Springer, Heidelberg, p 480Google Scholar
  22. Tyson RV (1995) Sedimentary Organic Matters, Organic facies and palynofacies. Chapman & Hall, London, p 615Google Scholar
  23. Whelan JK, Thompson-Rizer CL (1993) Chemical methods for assessing kerogen and protokerogen types and maturity. In: Engel Michael H, Macko Stephen A (eds) Organic Geochemistry. Plenum, New York, pp 289–353Google Scholar

Copyright information

© Saudi Society for Geosciences 2009

Authors and Affiliations

  • Thamer Khazaal Al-Ameri
    • 1
  • Furat Ata’a Al-Musawi
    • 2
  1. 1.Department of Geology, College of SciencesUniversity of BaghdadJadiriyahIraq
  2. 2.Department of Geology, College of SciencesUniversity of BabylonHillaIraq

Personalised recommendations