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