| 摘要 |
THIS INVENTION IS A PROCESS FOR MINIMISING THE SQUEEZING AND SHUT-IN OPERATIONS NEEDED TO INHIBIT SCALE IN A PRODUCTION WELL USING THE PRECIPITATION SQUEEZE METHOD BY INJECTING INTO AN OIL-BEARING ROCK FORMATION A WATER-MISCIBLE FORMULATION COMPRISING: (A) A WATER-MISCIBLE SURFACTANT WHICH IS IN LIQUID FORM, (B) A SOLUTION OF A WATER-SOLUBLE METAL SALT COMPRISING A MULTIVALENT CATION AND (C) A SOLUTION OF A WATER-MISCIBLE SCALE-INHIBITING COMPOUND COMPRISING AN ANIONIC COMPONENT CAPABLE OF FORMING A SCALE INHIBITING PRECIPITATE IN SITU IN THE PRESENCE OF THE CATIONS IN (B) UPON INJECTION INTO IN THE ROCK FORMATION, WHEREIN THE SURFACTANT IS A GLYCOL ETHER AND THE MINIMUM ION CONCENTRATION OF THE SCALE INHIBITING COMPOUND (C) IS 5000 PPM BASED ON THE TOTAL WEIGHT OF THE FORMULATION.
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