mexico city may 2 reuters  mexicos oil regulator said on tuesday the countrys total proven oil and gas reserves rose nearly 2 to reach 8162 billion barrels of crude oil equivalent up from 8014 billion barrels a year ago the national hydrocarbons commission or cnh also reported crude oil reserves up slightly at 6155 billion barrels from 6059 billion boe reported last year while gas reserves rose to 11029 trillion cubic feet bcf from 10781 trillion bcf a year earlier the oil regulators annual reserves data show the amount of reserves added though new certified oil and gas discoveries while also accounting for ongoing production that counts against the countrys remaining hydrocarbons the data brings together the reserves of stateowned oil company pemex pemxul the largest mexican oil and gas producer along with both domestic and foreign producers that entered the market after a decadeold energy opening that allowed them to operate their own fields prior to the 2013 constitutional reform only pemex could explore for and produce oil and gas