Sand control - Sand control Sand always produced from...

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Sand control : Sand always produced from tertiary unconsolidated sandstone reservoir . Why to control sand production? 1- Sand movement from around well bore causes collapse to formation, reduced reservoir permeability . 2- Sand causes problems wear to tubing, casing and separators, pump and surface facilities. 3- Sand plugs perforation. Causes of sand production : 1- Drag force. a- Increase in velocity in the well bore due to increase in production rate. b- Velocity increase turbulence which increase in pressure loss( p) in the well bore. c - Reduction in formation strength . 2- Reducion in formation strength due to increase in water saturation around well bore. 3- Declining reservoir pressure. P ob = P m + P F
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Sand control mechanisms : Natural control by:- 1-Decrease production flow rate (q) by: a- change in chock size b- reduced tubing size c- decrease perforation number 2- Decrease pressure loss If well is open the pressure loss decrease by chock size.
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