Wellbore sand control method

Details Wellbore sand control method Wellbore sand control method

E - Fixed Constructions

21

B

E21B 33/138 (2006.01)

Patent

CA 2180758

A slug of solution, comprising a linear polymer such as polysulfone, polyethylene terephthalate or polyimide dissolved in a "good" solvent, such as morpholine, m-cresol or dimethylsulfoxide, respectively is emplaced in the near- wellbore region of an unconsolidated sand reservoir. A second slug comprising a poor solvent for the polymer, such as water or water + 2-methanol is pumped into the region to contact the first slug. The linear polymer is precipitated and forms a three-dimensional network of interconnected strands extending through the fluid flow channels between the sand grains. The network functions to consolidate the sand without significantly damaging permeability.

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