The effect of regulation of well capacity on formation of sand plugs

The sand production still remains complicated problem in the wells of Absheron peninsula operated in “Azneft” PU. It is noted that the annual average height of sand plugs in the casing of mentioned wells reaches up to 665500 m. To prevent sand production, the hydrodynamic surveys were carried out and the following results were obtained: a) a mathematical model of plug formation in oil production, which combines the hydrodynamic parameters of reservoir and well has been developed; b) the rate of particle collection of solid substances remained in suspended state in the oil depends either on the viscosity and density of the oil, or on the hydrodynamic parameters of oil bearing reservoir; c) a hydrodynamic condition when the particle collection of solid substances in the oil does not occur is offered; d) within the offered hydrodynamic model of plug formation in the well, the aspects of regulation of well capacity providing the prevention of plug formation have been developed.