Fracture Detection in the Carbonate Baba Formation, Bai Hassan Oilfield, Northern Iraq, Using Conventional Well Log Data

قيس محمد صادق; دلير حسين بابان; ايوب محمد احمد  شواني; صابر صبحي البرزنجي

doi:10.52716/jprs.v14i3.858

المؤلفون

قيس محمد صادق North Oil Company, Ministry of Oil, Kirkuk, Iraq
دلير حسين بابان Geology Department, College of Science, University of Sulaimani
ايوب محمد احمد شواني North Oil Company, Ministry of Oil, Kirkuk, Iraq
صابر صبحي البرزنجي North Oil Company, Ministry of Oil, Kirkuk, Iraq

DOI:

https://doi.org/10.52716/jprs.v14i3.858

الكلمات المفتاحية:

Baba Formation, Fractures, Bai Hassan, Well logs, Secondary porosity

الملخص

يقع حقل باي حسن النفطي في جزء أقدام الجبال من نطاق الرصيف غير المستقر في شمال العراق و يتكون من طية محدبة طولية غير متناظرة و ثنائي الغاطس. نظرا لعدم وجود المعطيات المستحصلة من الأجهزة الخاصة بالكشف عن وجود الكسور في الصخور الخازنة مثل مجس التصوير الدقيق للتكوين(FIM) و جهاز التلفاز البئري، فقد تم الأستعانة في هذه الدراسة بمعطيات المجسات التقليدية في سبيل التحري عن وجود الكسور في الصخور الخازنة لتكوين بابا الكاربوناتي و ذلك في بئرين مختارتين من ابار حقل باي حسن النفطي و هما (BH-101) و (BH-078) .لقد تم تطبيق طرائق عديدة للكشف عن وجود الأنطقة الحاوية على الكسور في التكوين مثل أستخدام مرتسم (M-N) ثلاثي المسامية، أحتساب المسامية الثانوية، مجس مطياف گاما الطبيعي (NGS)، أنفصال منحني المقاومية لمجس اللاتيرولوگ المزدوج و مجس الكروي المبئور الدقيق، و معامل التسميت (m).

ان تبعثر النقاط على مرتسم M-N نحو منطقة المسامية الثانوية يدل بصورة أولية على وجود الكسور في التكوين، كما تم أحتساب نسب جيدة من المسامية الثانوية تراوحت بين أقل من 1.0 و 10% و قد تركزت الكسور في الجزء الأوسط و ألأسفل من التكوين. ان أزدياد حجم اليورانيوم نسبة لحجم البوتاسيوم و الثوريوم في ألأنطقة التي سجل فيها نسبة عالية من المسامية الثانوية يدل على وجود الكسور في تلك ألأنطقة. كما دعمت الهبوط في قيم المقاومية المسجلة لبعض ألأنطقة على وجود الكسور فيها. كما ان القيم المحتسبة لمعامل التسميت و البالغة 1.59 للبئر BH-101 و 1.71 للبئر BH-078 تدلان أيضا على ان التكوين يحتوي على التكسرات. من الأهمية بمكان أن تطبق طرق الكشف عن الكسور المتبعة في هذه الدراسة في أبار تملك معطيات مجس التصوير الدقيق للتكوين و ذلك لغرض المقارنة و التأكد من صحة نتائج الدراسة.

المراجع

E. Niven and C. V. Deutsch,, "Proposal for Modeling Naturally Fractured Reservoirs", Paper 108, Centre for Computational Geostatistics (CCG) Annual Report, Alberta, Canada, 2009.

R. Aguilera, "Analysis of Naturally Fractured Reservoirs From Conventional Well", Journal of Petroleum Technology, vol. 28, no. 7, pp. 764-772, 1976. https://doi.org/10.2118/5342-PA

W. Fertl, "Evaluation of Fractured Reservoirs Using Geophysical Well Logs", SPE Unconventional Resources Conference/Gas Technology Symposium, Pittsburgh, Pennsylvania 18-21 May: SPE paper 8938 presented at the 1980 SPE/DOE Symposium on Unconventional Gas Recovery, 1980. https://doi.org/10.2118/8938-MS

C. Boyeldieu and A. Winchester, "Use of the Dual Laterolog for the evaluation of the fracture porosity in hard carbonate formations", in Offshore South East Asia 1982 conference, 9–12 Feb., Singapore, Paper Number: SPE-10464-MS, 1982. https://doi.org/10.2118/10464-MS

S. Crary, R. Dennis, S. Denoo, O. Liu, S. Brown, and P. Cheung, "Fracture Detection With Logs", The Technical Review, vol. 35, no. 1, pp. 23-34, 1987.

B. Tokhmchi, H. Memarian and M. R. Rezaee, "Estimation of the fracture density in fractured zones using petrophysical logs," Journal of Petroleum Science and Engineering, vol. 72, no. 1-2, pp. 206-213, 2010. https://doi.org/10.1016/j.petrol.2010.03.018

T. Buday, Volume I: Stratigraphy and Paleontology" in The Regional, Mosul: Dar - Alkutib, 1980.

S. Jassim and J. C. Goff, "Geology of Iraq", Dolin: Prague and Museum, 2006.

Q. Sadeq, S. K. Bhattacharya and W. W. Yusoff, "Permeability estimation of fractured and vuggy carbonate reservoir by permeability multiplier in Bai Hassan Oilfield Northern Iraq," Journal of Petroleum and Biotechnology, vol. 6, no. 4, 2015. https://doi.org/10.4172/2157-7463.1000231

S. S. Barzinji, D. H. Baban and M. M. Ahmed, "Moveability and Nature of the Reservoir Hydrocarbons in the Lower Miocene Jeribe Formation in X-Oilfield, Northern Iraq," Iraqi Geological Journal, vol. 56, no. 1F, pp. 80-92, 2023. https://doi.org/10.46717/igj.56.1F.6ms-2023-6-14

Q. Sadeq, "Heterogenety, connectivity and geological modeling of Tertiary carbonate reservoir in Bai Hassan Oilfield North of Iraq", Malaysia: PhD Thesis (unpublished), University Technology Petronas, 2016.

R. Bellen, H. V. Dunnington., R. Wetyzel and D. Morton, Lexiquestratigraphique International, Paris: Asie, Fscicule 10a, Iraq, 1959.

Q. Mohammed, "Biostratigraphy of Kirkuk Group in Kirkuk and Bai-Hassan areas", Baghdad: MSc thesis (unpublished), University of Baghdad, 1983.

M. Ei-Eisa, "The two sub depositional cycle of the Early Miocene in Kirkuk oil field area, north Iraq," J Geol Soc, vol. 25, no. 1, pp. 41-58, 1992.

K. Bakkal and M. F. Al-Ghreri, "edimentological and paleontological study of Oligocene – Mioceneboundary basal conglomerate unit, west of Iraq", Jour. Science and Nature, vol. 2, no. 1, pp. 22-27, 1993.

A. Abid, Biostratigraphy and Microfacies of the Late Oligocene – Miocene formations center and northIraq., Baghdad: PhD thesis (unpublished), University of Baghdad, 1997.

I. Ghafor, "Biometric analysis of Lepidocyclina (Nephrolepidina) and Miogypsinoids from Baba and Azkand formations (Oligocene – Miocene) in Kirkuk area, Iraq", Sulaimani: PhD thesis (unpublished), Sulaimani University, 2004.

I. Ghafor, "Microfacies and biostratigraphy of Baba Formation (late Oligocene) in Bai Hassan, oil well-25, Kirkuk Area, central north Iraq", Iraqi Bulltin of Geology and Mining, vol. 7, no. 3, pp. 25-32, 2011.

H. N. Farhan, L. S. Kadem, and Q. A. Mohammed, “Microfacies and depositional environment of Bajawan and Baba Formations in Kirkuk Oil fields north Iraq”, Tikrit J. Pure Sci., vol. 21, no. 6, pp. 112–125, Feb. 2023. https://doi.org/10.25130/tjps.v21i6.1089

S. M. Hamdullaa, A. H. Hassan and Y. J. Tawfiq, "Building Geological Model for Tertiary Reservoir of Exploration Ismail Oil Field, North Iraq," Iraqi Journal of Chemical and Petroleum Engineering, vol. 19, no. 2, pp. 1-7, 2018. https://doi.org/10.31699/IJCPE.2018.2.1

Q. M. Sadeq and W. W. Yusoff, "Carbonate reservoirspetrophysical analysis of Bai Hassan Oilfield North of Iraq", Journal of Bioremediation & Biodegradation, vol. 6, no. 5, 311, 2015. https://doi.org/10.4172/2155-6199.1000311

T. Elkewidy and D. Tiab, "Application of Conventional Well Logs to Characterize Naturally Fractured Reservoirs with their Hydraulic (Flow) Units; A Novel Approach", SPE paper 40038 presented at the SPE Gas Technology Symposium held in Calgary, Canada, 15-18 March, 1998. https://doi.org/10.2118/40038-MS

L. Martinez, A. Gupta and Brown, R., "Interpretation of Important Fracture Characteristics from Conventional Well Logs", SPE paper 67280 Presented at the Production and Operations Symposium, 25- 28 March, Oklahoma City, OK, 2001.

J. Guo, Y. Xiao and H. Zhu, "A New Method for Fracturing Wells Reservoir Evaluation in Fractured Gas Reservoir," Mathematical Problems in Engineering, vol. 2014, Article ID 814284, 2014. http://dx.doi.org/10.1155/2014/814284

M. Shalaby and M. A. Islam, "Fracture detection using conventional well logging in carbonate Matulla Formation, Geisum oil field, southern Gulf of Suez, Egypt," J Petrol Explor Prod Technol., vol. 7, pp. 977–989, 2017. http://dx.doi.org/10.1007/s13202-017-0343-1

Sclumberger, Log Interpretation Principles/Applications, Sugar Land, Texas, 1989.

J. Klaja and L. Dudek, "Geological interpretation of spectral gamma ray (SGR) logging in selected boreholes", NAFTA-GAZ, vol. ROK LXXII, no. 1, 2016. http://dx.doi.org/10.18668/NG2016.01.01

Halliburton, "Compensated Spectral Natural Gamma Ray (CSNG™)", USA: Wireline and Perforating Services, 2008.

C. E. Weaver and L. D. Pollard, "The Chemistry of Clay Minerals: fundamentals and principles of petrophysics", Elsevier Scientific Publishing Company, 1973.

H. Belyadi, E. Fatih and F. Belyadi, "Rock mechanical properties and in situ stresses (Chapter Thirteen)", in Hydraulic Fracturing in Unconventional Reservoirs (Theories, Operations, and Economic Analysis) Second Edition, Gulf Professional Publishing, pp. 215-231, 2019.

P. Laongsakul and H. Durrast, "Characterization of reservoir fractures using conventional geophysical logging", Songklanakarin J Sci Technol, vol. 33, no. 1, pp. 237-246, 2011.

A. Sibbit and O. Faivre, "The Dual Laterolog response in fractured rocks", SPWLA, 26th ann. Log. Symp., Paper Number: SPWLA-1985-T, 1985.

P. Glover, "what is the cementation exponent? A new interpretation," in pecial section, Rock Physics, vol. 28, no. 1, pp. 82-85, 2009. https://doi.org/10.1190/1.3064150

Schlumberger, Log Interpretation Charts, Sugar Land, Texas, 2009.

D. Tiab and E. C. Donaldson, "Petrophysics – Theory and Practice of Measuring Reservoir Rock and Fluid Transport Properties", 2nd Ed., Gulf Professional Publishing - Elsevier, 2004.

H. Dunnington, "Generation, migration, accumulation and dissipation of oil in northern Iraq", In: Weeks LG (ed) Habitat of oil., Tulsa, AAPG, pp. 1194-1251, 1958.

Q. Sadeq and W. W. Yusoff, "Porosity and permeability analysis from well logs and core in fracture, vugy and intercrystalline carbonate reservoirs", Journal of Aquaculture Research and Development, vol. 6, no. 10, 2015.