CPC C09K 8/44 (2013.01) [C09K 8/035 (2013.01); E21B 21/003 (2013.01)] | 27 Claims |
1. A method for stopping fluid loss from a well into a formation penetrated by the well, comprising:
pumping a selected volume of a composition into the well until the selected volume is adjacent to the formation, wherein the composition comprises:
particles of a hydrated superabsorbent polymer (SAP) mixed with an aqueous solution of a salt tolerant osmotic barrier polymer to form a suspension;
wherein the salt tolerant osmotic barrier polymer comprises one or more of linear polyacrylamide, branched polyacrylamide, polyacrylamide-acrylamide tertiary butyl sulfonic acid co-polymer, xanthan gum, guar gum, derivatized guar gum, cellulose polymer, or derivatized cellulose polymers; and
mixing a colloidal gas aphron (CGA) with the composition to reduce a density of the composition.
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