Proppant flow back is a problem for ESPs
Many types of artificial lifts are utilized in oil fields
across North America to increase the flow of production liquids to the surface.
One of the most effective types of systems commonly used is an electric
submersible pump (ESP). ESPs are used in wells with low gas/oil ratios,
bubblepoint, or bottomhole ratios in addition to wells with a high water cut or
low API gravity fluids. Many improvements over the years have led to an
increased use of ESPs, which are considered economical and efficient on a
cost-per-barrel basis.
Over the life of the well, the ESP is exposed to many different factors that can
impact the pump’s performance. One very common issue is abrasion caused from
solids production, specifically from proppant flowback. In the early stages of
production, especially when an ESP is just installed, proppant flowback is
typically at its highest rate of occurrence.
In order to achieve a good ESP run life, it is important to control the exposure
of the ESP to proppant flowback. One of the most common ways to achieve this is
through the use of curable resin coated sand (CRCS). Under temperature and
closure pressure, the CRCS will bond to form a pack which controls sand
production in addition to maintaining frac width and enhancing permeability.
http://www.hexionfracline.com/flowback-causes-serious-issues-for-esps