تطابق، ارزیابی ژئوشیمیایی و تعیین سنگ منشأ محتمل نفت‌های خام مخازن ایلام و فهلیان در میدان نفتی جفیر با استفاده از داده‌های بایومارکری و پیرولیز سنگ منشأ

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه ژئوشیمی، دانشکده علوم زمین، دانشگاه خوارزمی، تهران، ایران

2 گروه زمین شناسی، دانشکده علوم زمین، دانشگاه خوارزمی، تهران، ایران

3 گروه علوم زمین، دانشکده علوم، دانشگاه سلطان قابوس، مسقط، عمان

4 پژوهشکده علوم زمین، پژوهشگاه صنعت نفت، تهران، ایران

چکیده

تطابق ژئوشیمیایی نفت‌ها با یکدیگر و با سنگ‌های منشأ، ابزاری مؤثر برای شناخت بهتر سیستم‌های نفتی در حوضه‌های رسوبی است که به اکتشاف و بهره‌برداری کارآمد از منابع هیدروکربنی کمک می‌کند. این مطالعه با تمرکز بر میدان جفیر، یکی از میادین مهم دشت آبادان در حوضه زاگرس، ویژگی‌های ژئوشیمیایی و ارتباط ژنتیکی نفت‌های مخازن ایلام و فهلیان را بررسی کرده و درک روشنی از سیستم نفتی این منطقه ارائه می‌دهد. آنالیزهای ژئوشیمیایی شامل آنالیزهای سارا، کروماتوگرافی گازی (GC) و کروماتوگرافی گازی-طیف‌سنجی جرمی (GC-MS) بر روی نفت‌های خام مورد مطالعه انجام شد. نتایج آنالیز سارا بیانگر فراوانی ترکیبات اشباع (میانگین 54%) نسبت به سایر اجزا بوده و ماهیت پارافینی نفت‌های مورد مطالعه را نشان می‌دهد. نسبت‌های بایومارکری نظیر Pr/Ph (میانگین 67/0)، DBT/Phen و توزیع استران‌های منظم (مثل C27 ،C28 وC29) نشان دهنده تولید نفت‌ها از مواد آلی دریایی، سنگ منشأ با لیتولوژی کربناته-مارنی و شرایط رسوب‌گذاری احیایی می‌باشد. پارامترهای بلوغ حرارتی، از جمله نسبت‌های (C32-hopane 22S/(22S+22R (میانگین 56/0) و (C29-sterane 20S/(20S+20R (میانگین 47/0)، نشان‌دهنده تولید این نفت‌ها از سنگ منشأ در مرحله پیک پنجره نفتی است. نمودارهای ستاره‌ای پارامترهای بایومارکری، تطابق ژنتیکی میان نفت‌های مخازن ایلام و فهلیان را تأیید می‌کند، هرچند تفاوت‌های جزئی در برخی نسبت‌ها، مانند DBT/Phen بالاتر در مخزن ایلام (21/2 در مقابل 98/0 در فهلیان)، احتمال مشارکت سنگ منشأ دیگر یا تغییر رخساره آلی را مطرح می‌سازد. مقایسه ویژگی‌های ژئوشیمیایی نفت‌ها با بیتومن استخراج‌شده از سازند گرو، این سازند را به‌عنوان سنگ منشأ اصلی معرفی می‌کند، اگرچه مشارکت احتمالی سایر سازندها همچون سازند سرگلو در مخزن ایلام نیز وجود دارد. پیرولیز راک اول نمونه‌های سازند گرو بیانگر پتانسیل مناسب این سازند بوده و همچین این سازند در مرحله مناسبی از بلوغ برای تولید نفت می‌باشد. این مطالعه درک عمیق‌تری از سیستم نفتی میدان جفیر ارائه داده و بر اهمیت سازند گرو در تولید هیدروکربن‌های منطقه تأکید می‌کند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Geochemical Correlation, Evaluation, and Identification of Probable Source Rocks for Crude Oils of the Ilam and Fahliyan Reservoirs in the Jufair Oil Field Using Biomarker and Source Rock Pyrolysis Data

نویسندگان [English]

  • Mozhde Ansari 1
  • Morteza Asemani 2
  • Behzad Mehrabi 3
  • Buyuk Ghorbani 4
1 Department of Geochemistry, Faculty of Earth Sciences, Kharazmi University, Tehran, Iran
2 Department of Geology, Faculty of Earth Sciences, Kharazmi University, Tehran, Iran
3 Department of Earth Sciences, College of Science, Sultan Qaboos University, Muscat, Sultanate of Oman
4 Geochemistry Department, Earth Sciences Research Institute, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
چکیده [English]

Geochemical correlation of crude oils with each other and with potential source rocks is a powerful tool for understanding petroleum systems in sedimentary basins, supporting more effective exploration and development of hydrocarbon resources. This study focuses on the Jufair field, one of the significant oil fields in the Abadan Plain of the Zagros Basin, to investigate the geochemical characteristics and genetic relationships of oils from the Ilam and Fahliyan reservoirs; thereby, providing a clear understanding of the petroleum system in this region. Moreover, geochemical analyses, including: SARA (Saturate, Aromatic, Resin and Asphaltene) fractionation, gas chromatography (GC), and gas chromatography-mass spectrometry (GC-MS), were conducted on the studied crude oils. The SARA analysis’ results indicate a predominance of saturated compounds (averaging 54%) compared to other components, revealing the paraffinic nature of the studied oils. Biomarker ratios, such as Pr/Ph (average 0.67), DBT/Phen, and the distribution of regular steranes (e.g., C27, C28, and C29), suggest that the oils were generated from marine organic matter, sourced from carbonate-marly lithologies under reducing depositional conditions. Thermal maturity parameters, including C32-hopane 22S/(22S+22R) (average 0.56) and C29-sterane 20S/(20S+20R) (average 0.47), indicate that these oils were produced from source rocks experiencing peak of the oil window. In addition, star diagrams of biomarker parameters confirm the genetic correlation between the oils of the Ilam and Fahliyan reservoirs. However, minor differences in some ratios, such as the higher DBT/Phen ratio in the Ilam reservoir (2.21 versus 0.98 in the Fahliyan reservoir), suggest the potential contribution of another source rock or variations in organic facies. Comparison of the oils’ geochemical characteristics with bitumen extracted from the Garau Formation identifies this formation as the main source rock. However, a possible contribution from other formations, such as the Sargelu Formation, to the Ilam reservoir is also possible. Rock-Eval pyrolysis of Garau Formation samples indicates its suitable potential, and this formation is at an appropriate maturity stage for oil generation. This study offers a deeper understanding of the Jufair field’s petroleum system, highlighting the significance of the Garau Formation in the region’s hydrocarbon production.

کلیدواژه‌ها [English]

  • Genetic Evaluation
  • Oil Families
  • Oil-oil Correlation
  • Oil-source Rock Correlation
  • Abadan Plain

مراجع

[1]. Bordenave, M. L., & Hegre, J. A. (2010). Current distribution of oil and gas fields in the Zagros Fold Belt of Iran and contiguous offshore as the result of the petroleum systems. Geological Society, London, Special Publications. 330 (1), 291-353. doi:10.1144/SP330.14.##
[2]. Bordenave, M. L. (2002). The middle cretaceous to early miocene petroleum system in the zagros domain of iran, and its prospect evaluation. In AAPG annual meeting, 6(1-9). Houston: Am. Assoc. Petrol. Geol. ##
[3]. Motiei, H. (2010). An introduction to Zagros petroleum reservoirs evaluation,(For Geologist). V, 2, 681. ##
[4]. Asemani, M., Rabbani, A. R., & Sarafdokht, H. (2021). Origin, geochemical characteristics and filling pathways in the Shadegan oil field, Dezful Embayment, SW Iran. Journal of African Earth Sciences, 174, 104047. doi.org/10.1016/j.jafrearsci.2020.104047. ##
[5]. Hosseiny, E., & Mohseni, A. (2023). Garau Formation as an unconventional hydrocarbon resource in southwestern Iran: a geochemical investigation. Journal of Petroleum Exploration and Production Technology, 13(7), 1535-1549. doi.org/10.1007/s13202-023-01634-1. ##
[6]. Ghorbani, B., Tavakoli, V., Rahimpour–Bonab, H., & Vahidimotlagh, N. (2025). Oil–oil and oil–source correlations in the Abadan Plain, SW Iran: Updated insights into middle Jurassic–Lower Cretaceous petroleum systems through biomarker analysis and chemometrics. Journal of African Earth Sciences, 223, 105525. doi.org/10.1016/j.jafrearsci.2024.105525. ##
[7]. Alizadeh, B., Saadati, H., Rashidi, M., & Kobraei, M. (2016). Geochemical investigation of oils from Cretaceous to Eocene sedimentary sequences of the Abadan Plain, Southwest Iran. Marine and Petroleum Geology, 73, 609-619. doi.org/10.1016/j.marpetgeo.2015.11.002. ##
[8]. Kobraei, M., Rabbani, A., & Taati, F. (2019). Upper Jurassic-lower cretaceous source-rock evaluation and oil—source rock correlation in the Abadan plain, Southwest Iran. Geochemistry International, 57, 790-804. doi: 10.1134/S0016702919070073. ##
[9]. Dehyadegari, E. (2021). Geochemistry and origins of Sarvak oils in Abadan plain: oil-oil correlation and migration studies. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 43(6), 716-726. doi.org/10.1080/15567036.2019.1631908. ##
[10]. Asadi Mehmandosti, E., Amirhoseyni, M., Moallemi, S. A., & Habibi, A. (2022). Geochemical investigation of the Cretaceous crude oil reservoirs and source rock samples in one of the Abadan Plain Oilfields, SW Iran. Acta Geologica Sinica‐English Edition, 96(2), 546-558. doi.org/10.1111/1755-6724.14699. ##
[11]. Alavi, M. (1994). Tectonics of the Zagros orogenic belt of Iran: new data and interpretations. Tectonophysics, 229(3-4), 211-238. doi.org/10.1016/0040-1951(94)90030-2. ##
[12]. Assadi, A., Honarmand, J., Moallemi, S. A., & Abdollahie-Fard, I. (2016). Depositional environments and sequence stratigraphy of the Sarvak Formation in an oil field in the Abadan Plain, SW Iran. Facies, 62, 1-22. doi: 10.1007/s10347-016-0477-5. ##
[13]. Beiranvand, B., Ahmadi, A., & Sharafodin, M. (2007). Mapping and classifying flow units in the upper part of the Mid‐Cretaceous Sarvak Formation (Western Dezful Embayment, Sw Iran) based on a detemination of reservoir rock types. Journal of Petroleum Geology, 30(4), 357-373. doi.org/10.1111/j.1747-5457.2007.00357.x. ##
[14]. Rajabi, M., Sherkati, S., Bohloli, B., & Tingay, M. (2010). Subsurface fracture analysis and determination of in-situ stress direction using FMI logs: An example from the Santonian carbonates (Ilam Formation) in the Abadan Plain, Iran. Tectonophysics, 492(1-4), 192-200. doi.org/10.1016/j.tecto.2010.06.014. ##
[15]. Alavi, M. (2004). Regional stratigraphy of the Zagros fold-thrust belt of Iran and its proforeland evolution. American journal of Science, 304(1), 1-20. ##
[16]. Fard, I. A., Braathen, A., Mokhtari, M., & Alavi, S. A. (2006). Interaction of the Zagros Fold–Thrust Belt and the Arabian-type, deep-seated folds in the Abadan Plain and the Dezful Embayment, SW Iran. Petroleum Geoscience, 12(4), 347-362. doi.org/10.1144/1354-079305-706. ##
[17]. Kobraei, M., Rabbani, A. R., & Taati, F. (2017). Investigating hydrocarbon generation potential of Pabdeh (tertiary) and Kazhdumi (early cretaceous) source rocks in Abadan Plain, Southwest Iran. Journal of Petroleum Research, 27(96-2), 4-17. doi: 10.22078/pr.2017.758. ##
[18]. Motiei, H. (1993). Stratigraphy of Zagros, Treatise on the geology of Iran. Iran Geological Survey, 1, 281-289. ##
[19]. Dembicki, H. (2022). Practical petroleum geochemistry for exploration and production. Elsevier. ##
[20]. Volkov, V. Y., Al-Muntaser, A. A., Varfolomeev, M. A., Khasanova, N. M., Sakharov, B. V., Suwaid, M. A., & Nurgaliev, D. K. (2021). Low-field NMR-relaxometry as fast and simple technique for in-situ determination  of SARA-composition of crude oils. Journal of Petroleum Science and Engineering, 196, 107990 doi.org/10.1016/j.petrol.2020.107990. ##
[21]. Tissot, B. P., & Welte, D. H. (2013). Petroleum formation and occurrence. Springer Science & Business Media. doi: 10.1007/978-3-642-87813-8. ##
[22]. Peters, K. E., Walters, C. C., & Moldowan, J. M. (2005). The biomarker guide (Vol. 1). Cambridge university press.
[23]. Peters, K. E., & Moldowan, J. M. (1993). The biomarker guide: interpreting molecular fossils in petroleum and ancient sediments. ##
[24]. Didyk, B. M., Simoneit, B. R. T., Brassell, S. T., & Eglinton, G. (1978). Organic geochemical indicators of palaeoenvironmental conditions of sedimentation. Nature, 272(5650), 216-222. ##
[25]. Alkhafaji, M. W., Peters, K. E., & Moldowan, J. M. (2023). Biomarker geochemistry of Qaiyarah, Butmah and Ain Zala crude oils, northern Iraq: Implications for the Jurassic source rocks. Geoenergy Science and Engineering, 221, 211382. doi.org/10.1016/j.geoen.2022.211382. ##
[26]. Mello, M. R., Telnaes, N., Gaglianone, P. C., Chicarelli, M. I., Brassell, S. C., & Maxwell, J. R. (1988). Organic geochemical characterisation of depositional palaeoenvironments of source rocks and oils in Brazilian marginal basins. In Organic geochemistry in petroleum exploration. 31-45. Pergamon. doi.org/10.1016/B978-0-08-037236-5.50009-9. ##
[27]. Holba, A. G., Dzou, L. I., Wood, G. D., Ellis, L., Adam, P., Schaeffer, P., ... & Hughes, W. B. (2003). Application of tetracyclic polyprenoids as indicators of input from fresh-brackish water environments. Organic Geochemistry, 34(3), 441-469. doi.org/10.1016/S0146-6380(02)00193-6. ##
[28]. Summons, R. E., Hope, J. M., Swart, R., & Walter, M. R. (2008). Origin of Nama Basin bitumen seeps: Petroleum derived from a Permian lacustrine source rock traversing southwestern Gondwana. Organic Geochemistry, 39(5), 589-607. doi.org/10.1016/j.orggeochem.2007.12.002. ##
[29]. Hughes, W. B., Holba, A. G., & Dzou, L. I. (1995). The ratios of dibenzothiophene to phenanthrene and pristane to phytane as indicators of depositional environment and lithology of petroleum source rocks. Geochimica et Cosmochimica Acta, 59(17), 3581-3598. doi.org/10.1016/0016-7037(95)00225-O. ##
[30]. Tao, S., Wang, C., Du, J., Liu, L., & Chen, Z. (2015). Geochemical application of tricyclic and tetracyclic terpanes biomarkers in crude oils of NW China. Marine and Petroleum Geology, 67, 460-467. doi.org/10.1016/j.marpetgeo.2015.05.030. ##
[31]. Holba, A. G., Tegelaar, E., Ellis, L., Singletary, M. S., & Albrecht, P. (2000). Tetracyclic polyprenoids: Indicators of freshwater (lacustrine) algal input. Geology, 28(3), 251-254. doi.org/10.1130/0091-7613(2000)28<251:TPIOFL>2.0.CO;2. ##
[32]. Huang, W. Y., & Meinschein, W. G. (1979). Sterols as ecological indicators. Geochimica et Cosmochimica acta, 43(5), 739-745. doi.org/10.1016/0016-7037(79)90257-6. ##
[33]. Strachan, M. G., Alexander, R., & Kagi, R. I. (1988). Trimethylnaphthalenes in crude oils and sediments: effects of source and maturity. Geochimica et Cosmochimica Acta, 52(5), 1255-1264. doi.org/10.1016/0016-7037(88)90279-7. ##
[34]. Alexander, R., Bastow, T. P., Kagi, R. I., & Singh, R. K. (1992). Identification of 1, 2, 2, 5-tetramethyltetralin and 1, 2, 2, 5, 6-pentamethyltetralin as racemates in petroleum. Journal of the Chemical Society, Chemical Communications, (23), 1712-1714. ##
[35]. Budzinski, H., Garrigues, P. H., Connan, J., Devillers, J., Domine, D., Radke, M., & Oudins, J. L. (1995). Alkylated phenanthrene distributions as maturity and origin indicators in crude oils and rock extracts. Geochimica et Cosmochimica Acta, 59(10), 2043-2056. doi.org/10.1016/0016-7037(95)00125-5. ##
[36]. Leila, M., Awadalla, A., Farag, A., & Moscariello, A. (2022). Organic geochemistry and oil-source rock correlation of the Cretaceous succession in West Wadi El-Rayan (WWER) concession: implications for a new Cretaceous petroleum system in the north Western Desert, Egypt. Journal of Petroleum Science and Engineering, 219, 111071. doi.org/10.1016/j.petrol.2022.111071. ##
[37]. Mohialdeen, I. M., Hakimi, M. H., Fatah, S. S., Abdula, R. A., Khanaqa, P. A., Lathbl, M. A., & Naseem, W. (2024). Organic geochemistry and 1-D basin modeling of the Late Triassic Baluti Formation: Implication of shale oil potential in the Kurdistan Region of Iraq. ACS omega, 9(6), 7085-7107. doi.org/10.1021/acsomega.3c09003. ##
[38]. Mackenzie, A. S., Hoffmann, C. F., & Maxwell, J. R. (1981). Molecular parameters of maturation in the Toarcian shales, Paris Basin, France—III. Changes in aromatic steroid hydrocarbons. Geochimica et Cosmochimica Acta, 45(8), 1345-1355. doi.org/10.1016/0016-7037(81)90227-1. ##
[39]. Zumberge, J. E. (1981). Tricyclic diterpane distributions in the correlation of Paleozoic crude oils from the Williston Basin. Advances in Organic Geochemistry, 738-745. ##
[40]. Moldowan, J.M., Fago, F.J., Carlson, R.M., Young, D.C., an Duvne, G., Clardy, J., Schoell, M., Pillinger, C.T. and Watt, D.S., 1991. Rearranged hopanes in sediments and petroleum. Geochimica et Cosmochimica Acta, 55(11), pp.3333-3353. doi.org/10.1016/0016-7037(91)90492-N. ##
[41]. Zumberge, J. E. (1984). Source rocks of the La Luna formation (Upper Cretaceous) in the middle magdalena valley, Colombia. doi.org/10.1306/St18443C9. ##
[42]. Siyar, S. M., Ali, F., Ahmad, S., Kontakiotis, G., Janjuhah, H. T., Jahandad, S., & Naseem, W. (2023). Organic geochemistry of crude oils from the Kohat Basin, Pakistan. Geosciences, 13(7), 199. doi.org/10.3390/geosciences13070199. ##
[43]. Bray, E. E., & Evans, E. D. (1961). Distribution of n-paraffins as a clue to recognition of source beds. Geochimica et Cosmochimica Acta, 22(1), 2-15. doi.org/10.1016/0016-7037(61)90069-2. ##
[44]. Peters, K. E., Walters, C. C., & Moldowan, J. M. (2005). The biomarker guide: Volume 2, Biomarkers and isotopes in petroleum systems and earth history. Cambridge University Press. ##
[45]. Radke, M. (1983). The methylphenanthrene index (MPI): a maturity parameter based on aromatic hydrocarbons. Advances in organic geochemistry 1981, 504-512. ##
[46]. Akinlua, A., Dada, O. R., Usman, F. O., & Adekola, S. A. (2023). Source rock geochemistry of central and northwestern Niger Delta: Inference from aromatic hydrocarbons content. Energy Geoscience, 4(3), 100141. doi.org/10.1016/j.engeos.2022.100141. ##
[47]. Radke, M., Welte, D. H., & Willsch, H. (1986). Maturity parameters based on aromatic hydrocarbons: Influence of the organic matter type. Organic Geochemistry, 10(1-3), 51-63. doi.org/10.1016/0146-6380(86)90008-2. ##
[48]. Radke, M. (1988). Application of aromatic compounds as maturity indicators in source rocks and crude oils. Marine and Petroleum Geology, 5(3), 224-236. doi.org/10.1016/0264-8172(88)90003-7. ##
[49]. Curiale, J. A. (2008). Oil–source rock correlations–Limitations and recommendations. Organic Geochemistry, 39(8), 1150-1161. doi.org/10.1016/j.orggeochem.2008.02.001. ##
[50]. Sun, Y., Sheng, G., Peng, P. A., & Fu, J. (2000). Compound-specific stable carbon isotope analysis as a tool for correlating coal-sourced oils and interbedded shale-sourced oils in coal measures: an example from Turpan basin, north-western China. Organic Geochemistry, 31(12), 1349-1362. doi.org/10.1016/S0146-6380(00)00069-3. ##
[51]. Zeinalzadeh, A., & Sajadian, A. (2010). Investigating source rock zones in the Darkhovain oil field by using petrophysics and rock Eval analysis. Journal of Science, University of Tehran (not publish), 35(3). ##
[52]. Abeed, Q., Alkhafaji, A., & Littke, R. (2011). Source rock potential of the Upper Jurassic–Lower Cretaceous succession in the southern Mesopotamian Basin, southern Iraq. Journal of Petroleum Geology, 34(2), 117-134. doi: 10.1111/j.1747-5457.2011.00497.x . ##
[53]. Kobraei, M., Rabbani, A. R., & Taati, F. (2017). Source rock characteristics of the Early Cretaceous Garau and Gadvan formations in the western Zagros Basin–southwest Iran. Journal of Petroleum Exploration and Production Technology, 7(4), 1051-1070. Doi: 10.1007/s13202-017-0362-y. ##
[54]. Behar, F., Beaumont, V. D. E. B., & Penteado, H. D. B. (2001). Rock-Eval 6 technology: performances and developments. Oil & Gas Science and Technology, 56(2), 111-134. ##
[55]. Peters, K. E. (1986). Guidelines for evaluating petroleum source rock using programmed pyrolysis. AAPG bulletin, 70(3), 318-329. doi.org/10.1306/94885688-1704-11D7-8645000102C1865D. ##
[56]. Espitalié, J., Laporte, J. L., Madec, M., Marquis, F., Leplat, P., Paulet, J., & Boutefeu, A. (1977). Méthode rapide de caractérisation des roches mètres, de leur potentiel pétrolier et de leur degré d'évolution. Revue de l'Institut français du Pétrole, 32(1), 23-42. ##
[57]. Peters, K. E., & Cassa, M. R. (1994). Applied Source Rock Geochemistry. ##
[58]. Espitalié, J., Deroo, G., & Marquis, F. (1985). La pyrolyse Rock-Eval et ses applications. Deuxième partie. Revue de l'Institut français du Pétrole, 40(6), 755-784. ##
[59]. Huang, B., Xiao, X., & Zhang, M. (2003). Geochemistry, grouping and origins of crude oils in the Western Pearl River Mouth Basin, offshore South China Sea. Organic Geochemistry, 34(7), 993-1008. ##
 
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دوره 35، 1404-5 - شماره پیاپی 144
آذر و دی 1404
صفحه 127-147

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