Recognition of Oil Traps in the Kopet-Dagh Basin (Northeastern Iran) Using Fusion of Seismic Attributes, Petrophysical Logs and Geological Data

Document Type : Research Paper


1 School of Geology, College of Science, University of Tehran, Tehran, Iran

2 Earth Science Department, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran



Integrated analysis of oil traps, especially those related to facies changes, is far more complicated than reservoirs related to structural traps. The most useful way to identify these complex subsurface structures directly related to facies change is to use seismic attributes. The main goal of this study is to integrate analysis of traps and their relationship with sedimentary facies, and to achieve this goal, petrographic, petrophysical, and seismic studies were integrated. Based on petrographic studies, five petrofacies, including Micro-Conglomerate, Sandstone, Claystone/ Shale, Sandy Dolomudstone, and Sandy Dolomitic Ooid Grainstone/Hybrid, which were identified in connection with the supratidal, intertidal, lagoon and fluvial environments and the main factor controlling the reservoir quality is primary sedimentary texture. A total of 11 microfacies, including anhydrite (MF1), dolomudstone (MF2), packstone peloid/ooid (MF3), packstone oncoid/peloid (MF4), dolostone (MF5), grainstone peloid/ooid (MF6), grain stone oncoid (MF7). Microbialite (MF8), boundstone (MF9), bioclastic packstone (MF10), and mudstone (MF11) were introduced for the Mozduran formation. The facies’ matching of the Shourije Formation with seismic attributes shows that the energetic parts of the fluvial Channel are related to coarse-grained sandstone and conglomerate facies, and the fine-grained shale sediments have played the role of cap rock and caused the formation of stratigraphic traps along the fluvial Channel. The reef structures identified in the Mozduran Formation indicate two depositional environments: a carbonate shelf and a carbonate bank. Grainstone peloid/ooid, grain stone oncoid. Microbialite and boundstone facies are associated with the reef core, shoal, and lagoon and have good reservoir quality. Therefore, by using seismic attributes, it is possible to examine all types of subsurface structures and their relationship with the Stratigraphic Traps. The results showed that generalized spectral decomposition performed well for the geometric detection of buried channels and reef structures. At the same time, the instantaneous frequency indicates the unconformity boundary, and the variance attribute can effectively be employed for identifying fractures.


  1. [1]. Kodkhodaei, A, (1401). Petroleum Geology, Tabriz University Publisher, Tabriz, Iran, 503-512, doi: 10.22078/JPST.2023.5158.1888. ##
  2. [2]. Chopra, S., & Marfurt, K. J. (2008). Seismic attributes for stratigraphic feature characterization: 78th Annual International Meeting, SEG, Expanded Abstracts, 1590–1594, ##
  3. [3]. Srivastava, A. K., Rao, J. D., Singh, V., Singh, S. N., & Chandra, M. (1999). Role of seismic attributes in finding new reserves: Cambay Basin, India, In SEG Technical Program Expanded Abstracts, Society of Exploration Geophysicists, 919-922, ##
  4. [4]. Link, Peter K. (1982). Basic petroleum geology, Petroleum - Geology, Tulsa: Oil & Gas Consultants International. ##
  5. [5]. Taner M T (2001). Seismic attributes, CSEG Recorder, Society of Exploration Geophysicists, 26, 7: 1104-1106. ##
  6. [6]. Taner, M. T., & Sheriff, R. E. (1977). Application of amplitude, frequency, and other attributes to stratigraphic and hydrocarbon determination: Section 2, Application of Seismic Reflection Configuration to Stratigraphic Interpretation, 301-327. ##
  7. [7]. Bahorich, M., & Farmer, S. (1995). 3-D seismic discontinuity for faults and stratigraphic features: The coherence cube. The leading edge, 14(10), 1053-1058, ##
  8. [8]. Wang, Y. 2007. Seismic time-frequency spectral decomposition by matching pursuit., 72, V13-V20, ##
  9. [9]. Randen, T., Pedersen, S. I., & Sønneland, L. (2001). Automatic extraction of fault surfaces from three-dimensional seismic data. In 2001 SEG Annual Meeting. OnePetro. ##
  10. [10]. Baytok, S. (2010). Seismic investigation and attribute analysis of faults and fractures within a tight-gas sandstone reservoir: Williams Fork Formation, Mamm Creek Field, Piceance Basin, Colorado (Doctoral dissertation, University of Colorado at Boulder). ##
  11. [11]. Ahmad, M. N., & Rowell, P. (2012). Application of spectral decomposition and seismic attributes to understand the structure and distribution of sand reservoirs within Tertiary rift basins of the Gulf of Thailand. The Leading Edge, 31(6), 630-634, ##
  12. [12]. Fang, J., Zhou, F., & Tang, Z. (2017). Discrete fracture network modelling in a naturally fractured carbonate reservoir in the Jingbei oilfield, China. Energies, 10(2), 183, ##
  13. [13]. Hosseinyar, G, R (2012). Seismic and Sequence Stratigraphy of Shurijeh Formation for Estimation of Reservoir Potential in the Sarakhs Area. Ph.D. thesis, Ferdowsi University of Mashhad, Mashhad. 253. ##
  14. [14]. Mortazavi Mehrizi, M (2013). Lithofacies Analysis, Depositional and Post Depositional History and Sequence Stratigraphy of the Shurijeh Formation (Late Jurassic-Early Cretaceous) in the Central and Western parts of the Kopet Dagh Basin. Ph.D. thesis, Ferdowsi University of Mashhad, Mashhad. 433. ##
  15. [15]. Moussavi-Harami, R., & Brenner, R. L. (1990). Lower Cretaceous (Neocomian) fluvial deposits in eastern Kopet-Dagh basin, northeastern Iran. Cretaceous Research, 11(2), 163-174, ##
  16. [16]. Moussavi-Harami, R., & Brenner, R. L. (1992). Geohistory analysis and petroleum reservoir characteristics of Lower Cretaceous (Neocomian) sandstones, eastern Kopet-Dagh Basin, northeastern Iran. AAPG bulletin, 76(8), 1200-1208, ##
  17. [17]. Moussavi‐Harami, R., & Brenner, R. L. (1993). Diagenesis of non‐marine petroleum reservoirs: The Neocomian (Lower Cretaceous) Shurijeh Formation, Kopet‐Dagh Basin, NE Iran. Journal of Petroleum Geology, 16(1), 55-72, ##
  18. [18]. Mortazavi, M., Moussavi‐Harami, R., & Mahboubi, A. (2013). Detrital mode and geochemistry of the Shurijeh Formation (Late Jurassic‐Early Cretaceous) in the central and western parts of the intracontinental Kopet‐Dagh Basin, NE Iran: Implications for provenance, tectonic setting and weathering processes. Acta Geologica Sinica‐English Edition, 87(4), 1058-1080, ##
  19. [19]. Mortazavi, M., Moussavi-Harami, R., Mahboubi, A., & Nadjafi, M. (2014). Geochemistry of the Late Jurassic–Early Cretaceous shales (Shurijeh Formation) in the intracontinental Kopet-Dagh Basin, northeastern Iran: implication for provenance, source weathering, and paleoenvironments. Arabian Journal of Geosciences, 7, 5353-5366, ##
  20. [20]. Hosseinyar, G, r, Mousavi Harami R, Abdolhi Fard A, Mahboubi A & Mosfi H R. "Identification of the FSST facies category in fluvial sequences with the example of Shurijeh Formation." Journal of Earth Sciences, 29, 113: 290-283, ##
  21. [21]. Hosseinyar, G., Moussavi‐Harami, R., Abdollahie Fard, I., Mahboubi, A., Noemani Rad, R., & Ebrahimi, M. H. (2019). Facies analyses and depositional setting of the L ower C cretaceous S hurried–S hatlyk formations in the K open D agh–A mu D Arya B asin (I ran and Turkmenistan). Geological Journal, 54(3), 1715-1729, ##
  22. [22]. Hosseinyar, G., Moussavi-Harami, R., Abdollahie Fard, I., Mahboubi, A., & Noemani Rad, R. (2019). Seismic geomorphology and stratigraphic trap analyses of the Lower Cretaceous siliciclastic reservoir in the Kopeh Dagh-Amu Darya Basin. Petroleum Science, 16, 776-793, ##
  23. [23]. Mahboubi, A., Moussavi-Harami, R., Carpenter, S. J., Aghaei, A., & Collins, L. B. (2010). Petrographical and geochemical evidences for paragenetic sequence interpretation of diagenesis in mixed siliciclastic–carbonate sediments: Mozduran Formation (Upper Jurassic), south of Agh-Darband, NE Iran. Carbonates and evaporites, 25, 231-246, ##
  24. [24] Moradi, M., Kadkhodaie, A., Rahimpour-Bonab, H. (2023). Controls of depositional facies and diagenetic processes on hydraulic flow units of the Shurijeh Formation in the one Gas field, Northeast of Iran. Journal Applied Sedimentology, 11(21), 267-284, ##
  25. [25]. Berberian, M., & King, G. C. P. (1981). Towards a paleogeography and tectonic evolution of Iran: Reply. Canadian Journal of Earth Sciences, 18(11), 1764-1766, ##
  26. [26]. Ramazani Oomali, R., Shahriari, S., Hafezi Moghaddas, N., Omidi. P., Eftrkharnejhad, J., 2008. A model for Active tectonics in Kopet Dagh (North-East Iran). World Applied Sciences Journal, 3, 312- 316. ##
  27. [27]. Nabavi, M.H (1355). An introduction to the geology of Iran, Geological Organization of Iran. 109. ##
  28. [28]. Aghajari, L., Alavi, S. A., Ghassemi, M. R., & Kavoosi, M. A. (2017). Structural and morphotectonic zonation of the Eastern Kopeh-Dagh. Scientific Quarterly Journal of Geosciences, 26(104), 125-134, ##
  29. [29]. Robert, A. M., Letouzey, J., Kavoosi, M. A., Sherkati, S., Müller, C., Vergés, J., & Aghababaei, A. (2014). Structural evolution of the Kopeh Dagh fold-and-thrust belt (NE Iran) and interactions with the South Caspian Sea Basin and Amu Darya Basin. Marine and Petroleum Geology, 57, 68-87, ##
  30. [30]. Yermolkin, V. I. (1986). Zonality of oil and gas accumulation on platforms [Zonalnost neftegazonakopleniya na platformennykh territoriyakh]: Moscow.
  31. [31]. Sheikholeslami, M. R., & Kouhpeyma, M. (2012). Structural analysis and tectonic evolution of the eastern Binalud Mountains, NE Iran. Journal of Geodynamics, 61, 23-46, ##
  32. [32] Folk, RL, (1974) "Petrology of sedimentary rocks: Hemphill Pub". Co., Austin-Texas, 182p. ##
  33. [33] Pettijohn, FPE PotterR Siever, Sandy depositional systems, in Sand and Sandstone. 1987, Springer. p. 341-423. ##
  34. [34] Miall, AD, The geology of fluvial deposits: sedimentary facies, basin analysis, and petroleum geology. 2013: Springer. ##
  35. [35]. Dunham, R. J (1962) Classification of carbonate rocks according to depositional texture: American Association of Petroleum Geologists Bulletin, 1: 108-121. ##
  36. [36]. Moradi, M., Rahimpour-Bonab, H., Kadkhodaie, A., & Chehrazi, A. (2022). Analysis and distribution of Hydraulic flow unit and Electrofacies in the framework of sedimentary sequences in one of the gas fields in northeastern Iran. Journal of Petroleum Research, 32(123), 3-18, ##
  37. [37] Aeshar-Harb A (1994) Geology of the Kopet-Dagh: Tehran, Geological Survey of Iran.
  38. [38]. Naftkav Report, Khangiran Gas Field Study Updating (Shurijeh-B Reservoir), Reservoir Characterization Report Basic Reservoir Engineering, May 2010. ##
  39. [39]. Jamali AM, Sadeghi A, Adabi M (2014). Stratigraphy and Sedimentary Environments of Shurijeh Formation in Barshai Baghek, Mozduran and Chah Najiran, East of Kopet-Dagh Basin, Iranian Geology Quarterly, 35, 93. ##
  40. [40]. Geological general report of the first and second parts of the fields of Khangiran and Gonbadli, Iran Central Regions Oil Company (Deep Drilling Oil Engineering Services Company) August 2019. ##
  41. [41]. Report of Kish Petroleum Engineering "Sedimentology of Shurijeh formation in Khangiran field" (2018). ##
  42. [42]. Aeshar-Harb A (1994) Geology of the Kopet-Dagh: Tehran, Geological Survey of Iran. ##
  43. [43]. Chopra, S., & Marfurt, K. (2006). Seismic Attributes–a promising aid for geologic prediction. CSEG Recorder, 31(5), 110-120. ##
  44. [44]. Chopra, S., & Marfurt, K. J. (2007). Seismic attributes for prospect identification and reservoir characterization. Society of Exploration Geophysicists and European Association of Geoscientists and Engineers. ##
  45. Brown, A. R. (2011). Interpretation of three-dimensional seismic data. Society of Exploration Geophysicists and American Association of Petroleum Geologists. ##
  46. Ismail, A., Ewida, H. F., Al-Ibiary, M. G., Grimaldi, S., & Zollo, A. (2020). Identification of gas zones and chimneys using seismic attributes analysis at the Scarab field, offshore, Nile Delta, Egypt. Petroleum Research, 5(1), 59-69, ##
  47. Koson, S., Chenrai, P., & Choowong, M. (2013). Seismic attributes and their applications in seismic geomorphology. Bulletin of Earth Sciences of Thailand, 6(1), 1-9. ##