Journal of Petroleum & Environmental Biotechnology

Generation of H2S, CO2 and organosulfured compounds present in thermal recovery processes in oil sands, Orinoco Belt Venezuela

World Congress on Oil, Gas and Petroleum Refinery

December 17-18, 2018 Abu Dhabi, UAE

Casalins Andres, JingKui Mi, Zhang Bin, Frank Cabrera

Univerdad Central of Venezuela, Venezula

Scientific Tracks Abstracts: J Pet Environ Biotechnol

Abstract:

The processes of thermal recovery (IAV, ICV, SAGD, among others) lead to aquatermolysis reactions occurring predominantly between 200 ° C and the range of 300-350 ° C, (Clark and Hyne ,1984). In the present investigation the experimental simulations were carried out in reactors in lines with parameters of pressure and temperature of (750 Psi, 1200Psi, 200 ° C and 300 ° C) where the Voil:Vwater is 1: 2 and sands of (95.5% SiO2, 1.2% FeS2 and 3.3% clay minerals, these reactions were generated in gold tubes at time intervals of 1 to 21 days. The results obtained in the present investigation show a proportional relationship between the increase of the temperature and the time of reaction in the generation of H2S reaching concentrations of 3870 ppm related to 2.55 mL of H2S / g.oil sand, for the generation of CO2 as the reaction time increases decreasing the concentration until a minimum of 1.70 mL of CO2 / g.oil sand is reached, it is important to mention that at 200 ° C the concentrations of H2S are significantly lower (Maximum generation 0.13 mL of H2S / g.oil sand equivalent to 212 ppm H2S) compared to 300 ° C, which suggests possibly thermal cracking of organosulfur compounds identified (more 144 organosulfured compounds using a GCxGC TOF gas chromatograph) among them Dibenzothiophenes present in the aromatic fraction of the crude. However, the amount of H2S generated during the vaporization process is also correlated with the amount of polysulphides (R-Sx-R) thiophenes and Tiols (R-S-H) present.

Biography :

Andres Casalins is a geochemical graduate in the faculty Sciences of the Univerdad Central of Venezuela, has mas of 10 years of experience in the petroleum industry, with mas of 7 national publications and internments in the area of recovery improved of hydrocarbons specifically in studies of mechanisms of generation of acid gases, hidrogeoquimica; Actually he is a manager of the pilot scheme of alternate injection of steam (IAV) of PDVSA Sinovensa.

E-mail: casalinsandres@gmail.com