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Characteristics of Upper Triasic Sandstone Reservoirs in Syria using Analysis of Laboratory Methods

I.M. Yousef, V.P. Morozov

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The Upper Triassic sandstones of gas-oil reservoirs of Euphrates Graben in Syria are characterized by certain mineralogical characteristics, conditioned by the processes of sedimentogenesis and diagenesis. In the course of the analytical work, it was possible to establish the nature of minerals composing sandstones and their impact on the porosity of rocks. So, for example, a good sorting of detrital grains and their substantial quartz composition is an important factor determining the increased values of porosity. On the other hand, the increased content of clay and authigenic minerals (more than 10-15%) reduces the porosity of rocks studied. Methods of optical microscopy, X-ray diffraction, electron microscopy and chemical analysis were used when describing sandstone. It is shown that the studied sandstones are quartz. Clay minerals, authigenic quartz and carbonates with a small fraction of amorphous material serve as cementitious material of detrital grains. Studies with a scanning electron microscope in conjunction with dispersive X-ray spectroscopy have shown that quartz is clastic and amounts to an average of 70%, and up to 10% of authigenic quartz is also present in the samples. The same studies show differences in the morphology of quartz, which are found in all samples.

sandstone, research methods, Euphrates Graben, Upper Triassic, Syria

  • Bellon A.S., Mosser C., Roquin C., and Pardo E.S. Geochemical characterization of sedimentary basins by statistical analysis – the Mio – Pliocene sequences of the Vera Basin, SE Spain. Chemical Geology. 1994. V. 116. Pp. 229-243.
  • Burley S.D. Burial diagenesis. Blackwell Scientific Publications Oxford. 1993. V. 15. Pp. 72-76.
  • De Ruiter R. C., Lovelock P. R., Nabulsi, N. The Euphrates Graben of eastern Syria: A new petroleum province in the northern Middle East. The Middle East Petroleum Geosciences, Gulf PetroLink, Bahrain. 1995. V. 1. Pp. 357-368.
  • Ferrell R.E., Hart G.F., and Murthy B. X-ray mineralogical discrimination of depositional environments of the Krishna Delta. Journal of Sedimentary Research. 1998. Issue 68. Pp. 148-154.
  • Ketzer J.M., Morad S., & Amorosi A. Predictive diagenetic clay-mineral distribution in siliciclastic rocks within a sequence stratigraphic framework. Clay Mineral Cements in Sandstones, International Association of Sedimentologists Special Publication. 2003. V. 34. Pp. 43-61.
  • 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. V. 155. No. 1. Pp. 95-100 (In Russ.)
  • 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. 2003. V. 34. Pp. 3-41.
  • Yousef I., Morozov V.P. Structural and mineralogical characteristics of the clay minerals in upper Triassic sandstone reservoir, Euphrates graben, east Syria. Neftyanoe Khozyaistvo = Oil Industry. 2017. No. 8. Pp. 68-71 DOI: 10.24887/0028-2448-2017-8-68-71

Kazan (Volga region) Federal University, Kazan, Russia

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Yousef I.M., Morozov V.P. Characteristics of Upper Triasic Sandstone Reservoirs in Syria Using Analysis of Laboratory Methods. Georesursy = Georesources. 2017. V. 19. No. 4. Part 2. Pp. 356-363. DOI: