Wells – Processes – Placing fluid into the formation
Patent
1990-12-28
1992-12-08
Suchfield, George A.
Wells
Processes
Placing fluid into the formation
166312, 166902, 252 8551, 252 8553, E21B 4327, E21B 4102
Patent
active
051689308
ABSTRACT:
A method of stimulating production from an oil or gas well comprising the steps of (a) injecting a desiccant through the well bore to dehydrate the well bore and a production zone within several feet around the well bore, (b) injecting an anhydrous acid into the production strata, the anhydrous acid being formulated to be gaseous at bottom hole temperature and pressure so that the gaseous anhydrous acid permeates through the dehydrated production strata and dissolves in connate water to form an acidic solution, and (c) shutting in the well for a period to allow the acidic solution formed in situ to react with the materials of the formation thereby increasing the permeability of the production strata and stimulating production from the well. A alcohol/polyglycol desiccant with exceptional lubricating, heat stability, and corrosion inhibiting characteristics is used to dehydrate the well and to form a corrosion resistant film on surfaces of the production string and casing.
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Carney Leroy L.
Wiseman Ben W.
Suchfield George A.
Wiseman Ben W.
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