The Sensex opened with a positive gap of 25 points at 13,049, and is now up 11 points at 13,035.ONGC has added Rs 7 to Rs 812. Reliance has gained Rs 3 to Rs 1,236. Infosys is up Rs 6 at Rs 2,130. TCS is up Rs 11 at Rs 1,090.ICICI Bank is down Rs 5 at Rs 780.