Portal de Periódicos da CAPES

Artigo Produção Nacional Revisado por pares

BIBTEX RIS

Biogenic gas production from major Amazon reservoirs, Brazil

2003; Wiley; Volume: 17; Issue: 7 Linguagem: Inglês

10.1002/hyp.1295

1099-1085

Luiz Pinguelli Rosa, Marco Aurélio dos Santos, Bohdan Matvienko, Elisabeth Sikar, Ronaldo Sérgio M. Lourenço, Carlos Frederico Menezes,

Hydrocarbon exploration and reservoir analysis

Abstract Methane (CH 4 ) and carbon dioxide (CO 2 ) emissions from Brazilian reservoirs were assessed. Point measurements were made during 1998 and 1999 (using inverted funnels for bubbles and air and water concentration gradients for diffusion) in the 559 km 2 Samuel reservoir, which was initially flooded in 1988, and the 2430 km 2 Tucuruí reservoir, which was flooded in 1984, and the data were evaluated with respect to historical measurements in other Brazilian reservoirs. Bubble emissions of CH 4 were higher in Samuel (ranging from 2 to 70 mgCH 4 m −2 day −1 ) than in Tucuruí (ranging from 0·5 to 30 mgCH 4 m −2 day −1 ), with the highest values occurring the shallowest regions in each reservoir. CH 4 from diffusion for the Tucuruí reservoir ranged from 5 to 30 mgCH 4 m −2 day −1 , which is lower than that for the Samuel reservoir, which ranged from 10 to 80 mgCH 4 m −2 day −1 . The smaller emissions in Tucuruí compared with Samuel are attributed to a larger depletion in the source organic material that was present when the reservoir was filled. The CO 2 concentration was similar for each reservoir, and ranged from 1000 to 10 000 mgCO 2 m −2 day −1 . Copyright © 2003 John Wiley & Sons, Ltd.