Physicochemical impacts associated with natural gas development on methanogenesis in deep sand aquifers.

ABSTRACT: The Minami-Kanto gas field, where gases are dissolved in formation water, is a potential analogue for a marine gas hydrate area because both areas are characterized by the accumulation of microbial methane in marine turbidite sand layers interbedded with mud layers. This study examined the physicochemical impacts associated with natural gas production and well drilling on the methanogenic activity and composition in this gas field. Twenty-four gas-associated formation water samples were collected from confined sand aquifers through production wells. The stable isotopic compositions of methane in the gases indicated their origin to be biogenic via the carbonate reduction pathway. Consistent with this classification, methanogenic activity measurements using radiotracers, culturing experiment

SUBMITTER: Katayama T 

PROVIDER: S-EPMC4303636 | biostudies-literature | 2015 Feb

REPOSITORIES: biostudies-literature