Об одном факторе, снижающем продуктивность скважин на поздней стадии разработки месторождений

Abstract

The paper presents a study of the influence of the displacement factor of perforation channels in the bottomhole zones of wells relative to the perforations in the casing pipes at a late stage of oil and gas field development, characterized by a decrease in reservoir pressure. It is shown that in most cases this displacement leads to deterioration or complete disappearance of the hydrodynamic connection of the bottomhole zone with the wellbore. It was found that the processes of creep of rocks, increasing the magnitude of the displacement of the seam top, enhance the effectof this factor. It is shown that in order to reduce the negative effects of displacement of perforation channels, it is advisable to use slotted perforation of wells or the technology of forming vertically close pairs of perforationchannels during the secondary opening of productive formations. The results of the study can be used for a reasonable choice of technologies for influencing the bottomhole zones of wells at a late stage of oil and gas field development.