Methodical approach to determining the maximum permissible velocity of the gas flow with mechanical impurities using numerical modeling of erosion processes of the main technological elements of wellhead equipment

Abstract

Long-term operation of gas fields is accompanied by changes in the stress-strain state of the productive reservoir, including irreversible processes of its destruction. The destruction of a productive reservoir is one of the reasons for the removal of mechanical impurities at the wellhead, abrasive wear, metal degradation, the appearance of defects in pipelines, equipment and wellhead binding. In order to avoid serious consequences from the development of defects due to the removal of impurities, various examinations are carried out using non-destructive testing methods. The need to monitor the actual condition of pipelines and wellhead equipment of wells operating the Cenomanian and Valanginian formations is due to the fact that during operation significant damage and destruction of the main elements of technological equipment may occur due to the removal of mechanical impurities, water, as well as the formation of hydrates, sand jams, etc., this can lead to serious economic losses, as well as the negative impact on the environment as a result of leaky connections and assemblies. Thus, in order to ensure reliable operation of producing gas wells in conditions of destruction of the bottom-hole zone of the well, it is necessary to choose a reasonable technological mode of operation, in which the risk of formation of sand and liquid plugs is reduced, and the negative impact of the removal of impurities on the condition of the equipment is minimized. Keywords: gas well; numerical modeling; bottom-hole zone; technological mode.