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