sentences:  It has geological similarities to other hydrocarbon-rich basins in the Middle East.The first exploration in the basin was undertaken by Standard Oil in 1920 More recent exploration by Tenneco resulted in the discovery of an estimated 68 million cubic metres (2.4
  billion cubic feet) of gas in 1974.Development of the reserves in the basin's Jeexdin and Elale gas fields is being carried out by the Gazoil Ethiopia Project, a joint-venture partnership between the government of Ethiopia and Texas-based Sicor announced in December 1999.