Important petroleum areas in Rajasthan are Bikaner, Jaisalmer, and western Jodhpur. Barmer, Sanchor – basin are also other areas of petroleum. The Cairn Energy India Limited, Great Britain based company, has the permit of mining petroleum in all areas of Gudamalani. The name of this petroleum mineral well is Rageshwari.
In the basin of Barmer-Sanchor, there are 31 wells, which have been dug for petroleum. In Jaisalmer, Tanot, Ghotaru, Dandewala, Sadewala, Manihari – Tibba and Longewala are the main petroleum areas. Recently, new reserves of petroleun have been found in the Mayajalar area of Jodhpur.