This paper presents the importance of the gases accumulations, how these gases could be accumulated in surface deposits, the concentration of the gases compounds and the goal of these aureoles is to evaluate the size of extension of these gases accumulations.
Several years ago, at Gherăieşti, this location being situated in the west part of Bârlad?s Depression, took place significant gas manefesatations at the basements and the first floors of some dwelling-houses from that residential quarter.
In 2003 were made studies for knowing the source of these gas emanations and this source is represented by many Sarmaţian gas complexes, situated in deep and these gases reached at surface deposits due to poor cimented column of many wells.
Along the time, were made different studies of the affected area by these emanations, the article referring at the study of these gases with geochemical aureoles of disperssion.
For the gases compounds from Gherăieşti (methane, ethane, propane, iso-butane and normal-butane) it?ll build geochemical aureoles on differet intervals of time. Following these aureoles we?ll see which are the zones with higher concentrations of gases and it will indicate the measures which must taken for the diminish the gaze influxes.