APPLICATION OF WELL LOG ANALYSIS TO ESTIMATE THE PETROPHYSICAL PARAMETERS OF THE LOWER RUDEIS FORMATION IN JULY OILFIELD, GULF OF SUEZ, EGYPT

Barakat, Moataz Kh.; El-Gendy, Nader H.; EL-Shishtawy, Ahmed M.; Shawaf, Fouad M.

doi:10.21608/absb.2022.135621.1180

APPLICATION OF WELL LOG ANALYSIS TO ESTIMATE THE PETROPHYSICAL PARAMETERS OF THE LOWER RUDEIS FORMATION IN JULY OILFIELD, GULF OF SUEZ, EGYPT

Document Type : Original Article

Authors

¹ Geology Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt.

² Exploration Department, Geological Operations and Petrophysics Division, GUPCO, Egypt.

10.21608/absb.2022.135621.1180

Abstract

The Gulf of Suez is considered as a multi-reservoir’s basin, containing several reservoirs. It is located at the northeast end of the African plate, along the African-Arab plates. One of the main reservoirs in the Gulf of Suez is the Lower Rudeis (July Member), especially in July Oilfield, and was deposited during the Early Miocene. Comprehensive studies were performed to illustrate the relationships between the different reservoir parameters measured through the well log analysis. The July member reservoir was divided into three zones based on geophysical log responses: denominate zones (A), (B) and zone (C). Petrophysical parameters were calculated, together with lithology and porosity identification cross-plots, for each zone individually to evaluate the July member sandstones. The obtained data indicated that the July member appears to be a good quality reservoir with relatively high storage capacity, with average shale volume of 8 to 42%, average effective porosity of 9.2 to 15.9 %, average calculated permeability of 16.2 to 71 mD, and average hydrocarbon saturation of 10.3 to 73.3 %. The reservoir parameters when mapped at the three levels of the reservoir zones have provided a clear figure about the horizontal distribution of these parameters in the study area and helped in tracing these parameters vertically.

Keywords

Main Subjects

Geology

References

[1] Said R, The Geology of Egypt, Elsevier, New York;1962. 377 pp.

[2] EGPC, Egyptian General Petroleum Corporation, Nile Delta north Sinai fields, discoveries and hydrocarbon potentialities (as comprehensive overview). EGPC-Cairo, Egypt; 1994.387 pp.

[3] Al-sharhan A S, Salah M G. Geology and hydrocarbon habitat in rift setting: northern and central Gulf of Suez, Egypt. Bulletin of Canadian Petroleum Geology; 1995. 43(2), 156– 176.

[4] Said R, The Geology of Egypt A. Balkema Publishers, USA; 1990. 734 pp.

[5] Darwish M, El Araby A. Petrography and diagenetic aspects of some siliclastic hydrocarbon reservoir in relation to the rifting of the Gulf of Suez, Egypt, Geol. Soc. Egypt Spec. Publ. No1; 1993.p. 155-187.

[6] Wescott WA, Attia M, Dolson JC. A brief history of the exploration history of the Gulf of Suez, Egypt. In: AAPG International Convention and Exhibition, Cancun, Mexico; 6-9 Sept 2016. Search and Discovery Article #30473.

[7] Barakat M Kh. Modern geophysical techniques for constructing a 3D geological model on the Nile Delta, Egypt. PhD Dissertation: Technische Universität Berlin; 2010, p.158.

[8] El-Gendy N, Barakat M, Abdallah H. Reservoir assessment of the Nubian sandstone reservoir in South Central Gulf of Suez, Egypt. Journal of African Earth Sciences, 129; 2017a, pp. 596-609.

[9] Shawaf F, Facies analysis and hydrocarbon evaluation of the Lower Miocene (Rudeis Formation) in July Oilfield, Gulf of Suez, Egypt, Msc. Tanta University; 2017, pp. 295.

[10] Jackson JA, White NJ, Garfunkel Z, Anderson H. Relations between normal-fault geometry, tilting and vertical motions in extensional terrains: an example from the southern Gulf of Suez. J. Struct. Geol. 10; 1988.155–170.

[11] Richardson M, Arthur M A. The Gulf of Suez-northern Red Sea Neogene rift: a quantitative basin analysis. Marine and Petroleum Geology, 5(3);1988. 247-270.

[12] McClay K, Nichols G, Khalil S, Darwish M, Bosworth W. Extensional tectonics and sedimentation, eastern Gulf of Suez, Egypt. In B. H. Purser & D. W. J. Bosence (Eds.), Sedimentation and tectonics of rift basins, Red Sea- Gulf of Aden ;1998. pp. 223–238. Chapman and Hall.

[13] EGPC, Egyptian General Petroleum Corporation, Gulf of Suez oil fields (A comprehensive overview) Cairo, Egypt ;1996. pp. 484-495.

[14] Gaafar G, Attia G, Khaled A, Ibrahim S. pertrophysical Evaluation of Rudeis Reservoir in July Oil Field, Gulf of Suez, Egypt, Second International Conference on the Role of Applied Geology in Environmental Development; 2009. P. 1-21.

[15] Khalil S, McClay K. Structural architecture of the Eastern Margin of the Gulf of Suez: field studies and analogue modelling results. 14^th EGPC Conference, Cairo;1998. pp. 201-211.

[16] Younes A I, McClay K. Development of accommodation zones in the Gulf of Suez-Red Sea rift, Egypt. American Association of Petroleum Geologists Bulletin 86; 2002.1003–1026.

[17] Day R A, Hoffman K S. more efficiently taps Suez oil using 3-D modeling. World oil, 218(9); 1997. 47–53.

[18] Abu-Hashish M F, Afify H M. Effect of petrography and diagenesis on the sandstone reservoir quality: a case study of the Middle Miocene Kareem Formation in the North Geisum oil field, Gulf of Suez, Egypt. Arabian Journal of Geosciences; 2022, 15:465. https://doi.org/10.1007/s12517-022-09686-z.

[19] Colletta B, Le Quellec P, Letouzey J, Moretti I. Longitudinal evolution of the Suez Rift Structure (Egypt). Tectonophysics, 153;1988. 221–233.

[20] Kassem A A, Sharaf L M, Baghdady A R, El-Naby A. Cenomanian/Turonian oceanic anoxic event in October oil field, central Gulf of Suez, Egypt. Journal of African Earth Sciences; 2020.165, 103817.

[21] Shehata A A, Kassem A A, Brooks H L, Zuchuat V, Radwan A E. Facies analysis and sequence-stratigraphic control on reservoir architecture: Example from mixed carbonate/siliciclastic sediments of Raha Formation, Gulf of Suez, Egypt. Marine and Petroleum Geology; 2021.131, 105160.

[22] Hosny W A, Gaafar I, Sabour A. Miocene stratigraphic nomenclature in the Gulf of Suez, 8^th EGPC Exploration Seminar, Cairo;1986. 10 p.

[23] Ouda K H, Masoud M Sedimentation history and geological evolution of the Gulf of Suez during the Late Oligocene-Miocene, Geol. Soc. Egypt, Spec. Publ. No.1;1993. p.47-88.

[24] Schlumberger, Log interpretation: v. 2 (application). Schlumberger Limited, New York; 1974. p.116.

[25] Dresser Atlas, Log interpretation charts. Houston, Dresser Industries, Inc; 1979. p. 107.

[26] Abdullah EA, Al-Areeq N M Al-Masgari A, Barakat M Kh. Petrophysical evaluation of the Upper Qishn clastic reservoir in Sharyoof oil Field, Sayun-Masilah Basin, Yemen. ARPN Journal of Engineering and Applied Sciences, 16(22); 2021. pp. 2375-2394.

[27] Barakat M Kh, Azab A A, Nabil M. Reservoir Characterization Using the Seismic Reflection Data: Bahariya Formation as a Case Study, Shushan Basin, North Western Desert, Egypt. Journal of Petroleum and Mining Engineering; 2022. 24 (1) p.1-11, 2021.DOI: 10.21608/jpme.2022.110315.1107.

[28] Rider M. The geological interpretation of well log (2nded.). London: Whittles Publishing; 1996. ISBN 9780954190606.

[29] Poupon A, Leveaux J. Evaluation of water saturation in shaly formations. In: Proceedings of the SPWLA 12th annual logging symposium;1971.

[30] Asquith GB, Gibson CR. Basic well log analysis for geologists. American Association of Petroleum Geologists, Tulsa;1997. 215 p.

[31] Asquith G, Krygowski D. Basic well log analysis, (2nded.) AAPG Methods in Exploration, 16: ; 2004.13–35.

[32] El-Gendy N, El-Shishtawy A, Barakat M Kh, Shawaf FM. Applying sedimentological and geophysical techniques for facies analysis and depositional history of July Member sandstones, the northern area of July oilfield, Gulf of Suez-Egypt. IOSR Journal of Applied Geology and Geophysics (IOSR-JAGG ;2017b. pp. 84-106.

[33] Barakat M Kh, Nooh A Z. Reservoir quality using the routine core analysis data of Abu Roash “C” in Badr El Din-15 oil field, Abu Gharadig basin, North Western Desert, Egypt. Journal of African Earth Sciences, 129; 2017. 683-691.

[34] Schlumberger, Log Interpretation Charts. Schlumberger Well Services, New York, USA;1986. pp. 44-45.

[35] Clavier C, Hoyle W R, Meunier D. Quantitative interpretation of TDT logs: parts I and II, J Pet. Tech;1971. pp.743–763.

[36] Dresser Atlas, Well logging and interpretation techniques, the course for home study. Dresser Industries Inc, Houston;1982.

[37] Schlumberger, Well evaluation conference of Egypt. Schlumberger, Middle East;1984. 201 p.

[38] Schlumberger, Log interpretation/charts: Huston, Schlumberger Well Services, Inc.;2006. p. 386.

[39] Simandoux P. Dielectric measurements on porous media: application to the measurement of the water saturations: study of the behaviour of argillaceous formations. Revue De I, institute francais Du Petrol 18, Supplementary Issue, 193–215 (translated text in Shaly Sand Reprint Volume, SPWLA, Houston;1963. pp. 97–124.

[40] Wyllie M R, Rose WD. Some theoretical considerations related to the quantitative evaluation of the physical characteristics of reservoir rocks from electrical log data: Petroleum Transaction of AIME, 189: ;1957.105-118