Reliance Industries (RIL) shares ended Mondays trade 2.21 per cent down at Rs 754.90 a piece on the Bombay Stock Exchange after reports showed output from its KG-D6 block has hit an all-time low production as the firm shut six wells due to water and sand ingress. Indias most valuable company,which invested roughly $5.6 billion,had started pumping out 30 mmscmd of gas from Dhirubhai-1 and 3 gas fields from April 2009,but output declined over the years to 28.16 mmscmd gas,news agencies quoting RIL status report to the oil ministry said.Our partner BP. is conducting a technical study, said a company official. The study will be completed in a couple of quarters.