Modeling of CO2 storage in an oil reservoir

This study provides an overview for the carbon dioxide sequestration process in an oil reservoir by using the software CMG's GEM. Different scenarios are applied for the oil reservoir description. Firstly, a single layered reservoir is considered and simulation studies are performed, as this reservoir is homogeneous, heterogeneous and fractured. Secondly, a multi-layered reservoir is examined. In the second case, a heterogeneous system and a heterogeneous system composed of homogenous layers are selected. For these two arguments, it is assumed that injection perforation is in the bottom layer and production perforation is in the top layer. As a third argument of multi-layered reservoir, a heterogeneous system composed of homogenous layers is selected and it is assumed that all layers are perforated for both injection and production. Finally, the effects of those properties on CO2 injection capacity, cumulative oil and gas production are discussed. In the single layered reservoir cases, cumulative oil production and CO2 injection capacity increase by reason of heterogeneity. When the system is fractured, cumulative production, CO2 injection and storage capacity decrease due to rapid increase in pressure as a consequence of low porosity. For the multi-layered reservoir, the case of homogeneous layers with two perforation intervals produces higher hydrocarbon recovery, amount of CO2 injection and storage. When CO2 is injected to all layers, pressure increases more rapidly, resulting in abridged time of injection. Hence, cumulative oil and gas production and mass of CO2 injected are restricted

Spectroscopic studies, antimicrobial activities and crystal structures of N-(2-hydroxy-3-methoxybenzalidene) 1-aminonaphthalene

Dulger, Basaran/0000-0002-3184-2652; Dulger, Basaran/0000-0002-3184-2652; Unver, Huseyin/0000-0003-3968-4385WOS: 000227082800012Schiff base N-(2-hydroxy-3-methoxybenzalidene)1-aminonaphthalene has been synthesized from the reaction of 2-hydroxy-3-methoxybenzaldehyde with 1-aminonaphthalene. The compound were characterized by elemental analysis, FT-IR, H-1 NMR, C-13 NMR and UV-visible techniques. The UV-visible spectra of the Schiff base were studied in polar and nonpolar solvents in acidic and basic media. The structure of the compound has been examined cyrstallographically. There are two independent molecules in the asymmetric unit. It crystallizes in the monoclinic space group P2(l)/c, with unit cell parameters: a=14,602(2), b=5,800(1), c= 16,899(1) Angstrom, V= 1394.4(2) Angstrom(3) D-x=1.321 g cm(-3) and Z = 4. The crystal structure was solved by direct methods and refined by full-matrix least squares to a find R = 0.041 of for 1179 observed reflections. The title compound's antimicrobial activities also have been studied. The antimicrobial activities of the ligand has been screened in vitro against the organisms Escherichia coli ATCC 11230, Staphylococcus aureus ATCC 6538, Klebsiella pneumoniae UC57, Micrococcus luteus La 2971, Proteus vulgaris ATCC 8427, Pseudomonas aeruginosa ATCC 27853, Mycobacterium smegmatis CCM 2067, Bacillus cereus ATCC 7064 and Listeria monocytogenes ATCC 15313, the yeast cultures Candida albicans ATCC 1023 1, Kluyveromyces fragilis NRRL 2415, Rhodotorula rubra DSM 70403, Debaryomyces hansenii DSM 70238 and Hanseniaspora guilliemodii DSM 3432. (C) 2004 Elsevier B.V. All rights reserved

Orbital pain and headache secondary to overfilling of a root canal

A 35-yr-old woman was referred to the Istanbul University, Faculty of Dentistry, Oral Surgery Department with complaints of orbital pain and headache. Panoramic radiographs showed overfilling of a maxillary premolar, which caused a perforation in the maxillary sinus floor. The etiology, clinical manifestations, and treatment of this complication are discussed with emphasis on early surgical intervention to decrease the risk of a superimposed aspergillosis infection