Process for recovering oil from an oil-bearing formation and treating produced water containing anti-scaling additives

摘要

#$%^&*AU2013205109B220170406.pdf#####C&B Ref. No.: 6900-006 ABSTRACT A method of recovering oil from an oil-bearing formation including recovering an oilwater mixture from the oil-bearing formation and separating produced water from the oil-water mixture. The produced water includes phosphonate anti-scalant compounds. An oxidant is mixed with the produced water to deactivate the phosphonate anti-scalant compounds, thereby permitting dissolved solids in the produced water to precipitate. After deactivating the phosphonate anti-scalant compounds, the produced water is directed into a ceramic membrane which filters the produced water, producing a permeate stream and a retentate stream having suspended solids and precipitants therein. 13FIGURE 1. WATER + ANTISCALANT CHEMICAL INJECTION INTO OIL-BEARING FORMATION (OPTIONAL) OIL-WATER ANTI-SCALANT MIXTURE CHEMICAL PRODUCTION ADDITION TO & MIXTURE AT COLLECTION PRODUCING WELL PRIMARY OIL-WATER OIL SEPARATION MIXED REACTOR - OXIDANT DE-ACTIVATION OF ADDITION ANTI-SCALANTS CLARIFICATION UNIT - MEMBRANE OPTIONAL SEPARATION UNIT SLUDGE DEOILED, TSSFREE WATER