Clay stabilizing method for oil and gas well treatment
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United States of America Patent
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Mar 31, 1992
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N/A
app pub date -
Feb 25, 1991
filing date -
Feb 25, 1991
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Abstract
A clay swelling inhibitor additive for oil and gas well treatment is disclosed. The additive comprises an aqueous solution of tetraalkylammonium chloride, preferably tetramethylammonium chloride and a quaternary amine-based cationic polyelectrolyte, such as methyl chloride quaternary salt of ethylene-ammonia condensation polymer. The additive composition synergistically retards water absorption by the down-hole clay formation.
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