Oil & Natural Gas Corporation (ONGC) has reported a 103.27% increase in net profit at Rs 3,493.32 crore for the third quarter ended December 31, 2004 as against Rs 1,718.53 crore in Q3FY04.According to a release issued to the BSE today, total income has increased to Rs 12,565.13 crore from Rs 7,575.73 crore in Q3FY04.