I. Yousef, V.P. Morozov, M. El-Kadi
 
Diagenetic clay minerals in Upper Triassic sand reservoirs of the Euphrates Graben (Syria)
DOI 10.31087/0016-7894-2018-6-137-147

Sandstone of the Upper Triassic oil reservoir (Mulussa F bed) is one of the main oil production targets. Tectonically, it is confined to the Euphrates Graben. Lithofacies analysis is carried out, and morphology of clay minerals making a part of the sandstone is investigated. We used radiography analysis, scanning electron microscopy, including microanalysis. The different roles of minerals in filling a sandstone pore space are shown. Among clay minerals, the following are predominating: kaolinite, illite, chlorite and mixed-layered clay mineral having illite-smectite composition. Kaolinite is a basic phase of clay minerals; it makes up to 81 % of total volume of clay mass. Morphologically, kaolinite forms hexagonal and pseudohexagonal blades and aggregates composed of crystals ranging in size from 10 to 15 µm. The latter form fan-like intergrowths 20 to 69 µm in size, which completely or partially fill pore space. Chlorites are usually found as granular overgrowths on the clastic grains; they make almost 13 % of clay mass in sandstone.

 

Key words: diagenetic, clay minerals; sandstone; Upper Triassic formations; Euphrates Graben; Syria.

For citation: Yousef I., Morozov V.P., El-Kadi M. Diagenetic clay minerals in Upper Triassic sand reservoirs of the Euphrates Graben (Syria). Geologiya nefti i gaza. 2018;(6):137–147. DOI: 10.31087/0016-7894-2018-6-137-147

References

1.  Litak R.K., Barazangi M., Beauchamp W., Seber D., Sawaf T., Al-Youssef W. Mesozoic-Cenozoic evolution of the intraplate Euphrates fault system, Syria: Implications for regional tectonics // Journal of the Geological Society. – 1997. – № 3. – C. 653–666. DOI: 10.1144/gsjgs.154.4.0653

2. De Ruiter R.S.C., Lovelock P., Nabulsi N. The Euphrates graben of eastern Syria: A new petroleum province in the northern Middle East. Geo. 1995;1(1):357–368.

3. Barazangi M., Seber D., Chaimov J., Best J., Litak R., Al-Saad D., Sawaf T. Tectonic evolution of the northern Arabian plate in Western Syria. In: E. Boschi, E. Mantovani, A. Morelli, eds. Recent evolution and seismicity of the Mediterranean region. Springer, 1993. N. 15. pp. 117–140.

4. Sawaf T., Zaza T., Syrriyah O. The distribution and lithostratigraphic base for the sedimentary formations in the Syria Arab Republic, Special published report. Syria Petroleum Company Report. N. 13. Damascus, 1993. pp. 173–190.

5. Sharland P.R., Archer R., Casey D.M., Davies S.H., Hall S.H., Heward A.P., Horbury A.D., Simmons M.D. Arabian plate sequence stratigraphy. GeoArabia Special publication. 2001;(2):371–377.

6. Koopmans M.P., Van B. Regional Paleozoic correlation, central and east of Syria. Al Furat Petroleum Company AFPC. 1992;(30):1089–1104.

7. Ponikarov V.P., Kazmin V.G., Mikhailov I.A., Razvaliayev A.V., Krasheninnikov V.A., Kozlov V.V., Soulidi-Kondratiyew E.D., Faradzhev V.A. The geological map of Syria. Scale 1 : 1 000 000. Syrian Arab Republic. Ministry of Industry, Map and Explanatory Notes. 1966. 111 p.

8. Shmyrina V.A., Morozov V.P. Effects of Secondary Alterations of Reservoir Rocks on the Porosity and Permeability of Productive Formations Bs111 and Us11 at the Cluster Deposit. Uchenye Zapiski Kazanskogo Universiteta. Seriya Estestvennye Nauki. 2013;155(1):95–100.

9. Ferrell R.E., Hart G.F., Murthy B. X-ray mineralogical discrimination of depositional environments of the Krishna Delta. Journal of Sedimentary Research. 1998;(68):148–154.

10.  Gier S., Worden R.H., Johns W.D., Kurzweil H. Diagenesis and reservoir quality of Miocene sandstones in the Vienna Basin, Austria // Marine Petroleum Geology. – 2008. – № 25. – С. 675–690 DOI: 10.1016/j.marpetgeo.2008.06.001

11. Ali S.A., Clark J.W., Moore R.W., Dribus R.J. Diagenesis and reservoir quality. Oilfield Review Summers. 2010;(2):14–24.

12. Schmid S., Worden R.H., Fisher Q.J. Diagenesis and reservoir quality of the Sherwood Sandstone (Triassic), Corrib Field, Slyne Basin, west of Ireland // Marine Petroleum Geology. – 2004. – № 21. – С. 299–315. DOI: 10.1016/j.marpetgeo.2003.11.015

13. Zhang J.L., Qin L.J., Zhang Z.J. Depositional facies, diagenesis and their impact on the reservoir quality of Silurian sandstones from Tazhong area in central Tarim Basin, western China. Journal Asian Earth Science. 2008;(33):42–60.

14.  Hakimi M.H., Shalaby M.R., Abdullah W.H. Diagenetic characteristics and reservoir quality of the Lower Cretaceous Biyadh sandstones at Kharir oilfield in the western central Masila Basin, Yemen // Journal Asian Earth Science. – 2012. – № 51. – С. 109–120. DOI: 10.1016/j.jseaes.2012.03.004

15. Brigatti M.F., Galan E., Theng B.K.G. Structure and mineralogy of clay minerals. – Elsevier, 2006. – № 2. – P. 29–35. DOI: 10.1016/S1572-4352(05)01002-0

16. Philip J.A., James L.B., Daniel R.P. Fluvial-Tidal Sedimentology. Developments in Sedimentology. 2015;(68):620–634.

17. Worden R.H., Morad. S. Clay minerals in sandstones: A review of the detrital and diagenetic sources and evolution during burial. International Association of Sedimentologists, Special Publication. 2003;(34):3–41.

I. Yousef

Institute of Geology and Petroleum Technologies, Kazan Federal University, Kazan, Russia;

ibrahem.youseef@mail.ru

V.P. Morozov   Scopus   iD 

Institute of Geology and Petroleum Technologies, Kazan Federal University, Kazan, Russia;

vladimir.morozov@kpfu.ru

M. El-Kadi

University of Damascus, Damascus, Syria;

elkadimohamed@yahoo.fr