Going by RIL's already-announced discoveries, the current estimated gas reserves from these two blocks stand at over 25t cuft. According to a plan submitted by RIL to the country's petroleum ministry, such a multi-source system will not only ensure continuity of supplies to consumers, but also enhance their reliability and security. RIL has planned a large network of pipelines to export gas from these two sources. With a huge investment, the three gas pipeline projects proposed by the company include the 1,500-km Kakinada-Uran (Maharashtra), 1,400-km Kakinada-Chennai-Coimbatore (Tamil Nadu), and the 1,100-km Kakinada-Basudebpur-Howrah (West Bengal) routes. The petroleum ministry has already floated expressions of interest for booking capacities from these three pipelines, which are to be built on a common-carrier basis. Besides covering Bangalore and Mangalore, RIL also proposes to extend its pipeline from Chennai to Tuticorin. Two more pipelines have been planned from Basudebpur to Cuttack in Orissa and Bhopal in Madhya Pradesh, and from Basudebpur to Howrah, Hooghly and Bardhaman in West Bengal. RIL has also written to the ministry to later extend them to cover Chattisgarh and Bihar. Following the boost in production from its KG basin D6 block, from 40m cum/d to 80m cum/d, Reliance has put on hold the plans to develop its NEC-25 offshore gas block in Orissa. As a consequence, the markets of West Bengal, Bihar, and Madhya Pradesh, to which Reliance had earlier proposed to supply gas from its offshore block, will now be fuelled by supplies from its D6 blocks from 2008-09.