{TAIL ~ The method} 1, wherein about 0.005 to about 0.4 pore volumes of solution containing {HEAD ~ a sacrificial agent} is injected into the formation 
{ TAIL ~ The method } 1 , wherein about 0.005 to about 0.4 pore volumes of solution containing { HEAD ~ a sacrificial agent } is injected into the formation
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH