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