Water treatment
First Claim
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5. IN A CLOSED SYSTEM WATER REPRESSURING METHOD FOR SECONDARY RECOVERY OF OIL FROM AN OIL-BEARING FORMATION, WHICH METHOD COMPRISES, SEPARATION OF OIL AND WATER PRODUCED FROM AN OIL-BEARING FORMATION, FILTRATION OF SAID WATER AND INJECTION OF SAID WATER INTO AN OIL-BEARING FORMATION, AND WHEREIN SAID WATER CONTAINS SULFIDE IONS AND FERROUS IONS, THE IMPROVEMENT WHICH COMPRISES;
- ADDING AN OXIDIZING AGENT TO SAID WATER PRIOR TO SAID FILTRATION, SAID OXIDIZING AGENT BEING ADDED IN AN AMOUNT SUFFICIENT TO MAINTAIN THE CONCENTRATION OF SAID SULFIDE IONS AT LESS THAN 2.5 PARTS PER MILLION, BUT INSUFFICIENT TO OXIDIZE SAID FERROUS IONS.
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5 Claims
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5. IN A CLOSED SYSTEM WATER REPRESSURING METHOD FOR SECONDARY RECOVERY OF OIL FROM AN OIL-BEARING FORMATION, WHICH METHOD COMPRISES, SEPARATION OF OIL AND WATER PRODUCED FROM AN OIL-BEARING FORMATION, FILTRATION OF SAID WATER AND INJECTION OF SAID WATER INTO AN OIL-BEARING FORMATION, AND WHEREIN SAID WATER CONTAINS SULFIDE IONS AND FERROUS IONS, THE IMPROVEMENT WHICH COMPRISES;
- ADDING AN OXIDIZING AGENT TO SAID WATER PRIOR TO SAID FILTRATION, SAID OXIDIZING AGENT BEING ADDED IN AN AMOUNT SUFFICIENT TO MAINTAIN THE CONCENTRATION OF SAID SULFIDE IONS AT LESS THAN 2.5 PARTS PER MILLION, BUT INSUFFICIENT TO OXIDIZE SAID FERROUS IONS.
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Current AssigneeEdwin D. Parsons
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Original AssigneeEdwin D. Parsons
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InventorsParsons, Edwin D.
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Application NumberUS03/375,105Time in Patent Office1,315 DaysField of SearchUS Class Current166/266CPC Class CodesC02F 1/76 with halogens or compounds ...
