MEXICO CITY, June 20 (Reuters) - Mexico's state energy company Pemex will start processing crude oil in its new Olmeca refinery in the port of Dos Bocas in the second half of the year, its Chief Executive Officer Octavio Romero said on Thursday.

At the end of the year, Romero added, Pemex would process 1.44 million barrels per day at its domestic refineries, including 163,000 in the new Olmeca in Tabasco state. (Reporting by Ana Isabel Martinez)