Reliance Natural Resources (RNRL) has posted a 171% increase in net profit at Rs 19 crore for the quarter ended September 30, 2007, (Q2FY08) when compared with Rs 7 crore in Q2FY07.According to an official release issued by the company to the BSE today, total income for the company grew 154% to Rs 61 crore from Rs 24 crore in Q2FY07.