Experimental modeling of abandoned shallow oil wells convergence

The paper discusses issues related to inappropriately abandoned production wells in depleted oil field near Hodonín (South Moravia, Czech Republic). The characteristic effects of the well deformation, depending on whether there was a possibility of fluid displacement from the well space were defined on the basis of model experiments. It was proven that in the analyzed conditions, convergence of abandoned wells is not equivalent to their proper liquidation, because the communication of media is still possible, creating a risk of pollution of groundwater and land surface.

► By physical modeling we simulated convergence of abandoned shallow oil wells in clays
► With liquid trapped in well partial deformation and hydraulic rock fracturing occur.
► If liquid escaped a narrow channel and cracks were formed allowing for fluid flow
► Despite convergence poor abandoned wells enable oil flux from collector to surface.