In accordance with the process, {HEAD ~ an aqueous alkaline chemical solution} is introduced into or formed in {TAIL ~ the well bore} penetrating the formation 
In accordance with the process , { HEAD ~ an aqueous alkaline chemical solution } is introduced into or formed in { TAIL ~ the well bore } penetrating the formation
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH