Innovative sand failure analysis and prediction modeling restore lost production in North Sea field ///

Sand production is a major problem in many clastic reservoirs worldwide, costing producers billions of dollars every year in lost or restricted production, and expensive well interventions. When stresses acting on a consolidated sandstone formation become sufficiently high, they can cause the rock matrix to break through compressive failure, releasing fragments and individual particles. As hydrocarbons flow through perforations out of the formation and into the wellbore, if fluid velocity is high enough, sand grains may be carried all the way to the surface. If, however, fluid velocity is low, sand will begin to deposit inside the wellbore, impeding the free flow of oil or gas.

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