Essar Oil and Gas Exploration and Production Ltd (EOGEPL) on Monday announced an investment in microbial eCBM technology to boost coal-bed methane (CBM) production from its CBM block in West Bengal. The company, which has so far invested Rs 5,000 crore in finding and producing gas from coal seams, called CBM, plans to invest an additional Rs 2,000 crore to enhance its reserve base and ramp up CBM production to contribute at least 5 per cent to India’s total gas production, EOGEPL said in a statement.