The Rajasthan Basin is a sedimentary basin located in the north west part of India. This sedimentary basin is one of India's major sources of petroleum and natural gas and has a geographical extent of about 126000sqkm. The Rajasthan Basin unconfirmably lies over Precambrian basement rocks.[1]
Huge reserves of naturally occurring hydrocarbons are expected in clastic and carbonate reservoirs in Cambrian to Paleocene sequences like limestone and shales capped by intra formational shales and tight limestones. Oil and Natural Gas Corporation (ONGC), Oil India Limited and Focus energy are some of major petroleum companies in this basin.
The Rajasthan Basin has been further divided into three sub-basins.
Bikaner nagaur sub basin is separated from Jaisalmer basin by pokaran high while DEvikot Nachna uplift separates Barmer Sanchor sub basin from Jaislmer sub basin.