The appraisal well encountered a 175-meters (574-feet) hydrocarbon column and produced around 16 million standard cubic feet of gas and 4,000 barrels per day of oil, Statoil said.
The Halini-Deep-1 discovery is the third discovery in the block following Halini-X-1 in 2011 and Kalabagh-1A in 2015.
The discovery could signal another basin opening in East Africa. The Cheptuket-1 well was the first to test oil potential in the Kerio Valley Basin.
Kosmos Energy said on March 16 it had made a fourth significant gas find in an offshore structure spanning Mauritania and Senegal.
The Maligan well was drilled by the Swedish company's subsidiary, Lundin Malaysia BV, with the West Prospero jack-up rig in Block SB307/SB308. Total depth was about 1,380 m (4,528 ft) and encountered significant gas shows.
Eni’s continued exploration success in Egypt comes amid a downturn that has caused some companies to reduce exploration spending.
The state-owned offshore oil and gas explorer started to drill the Lingshui 18-1-1 exploration well last October in water depths of 1,688 meters (5,538 ft) and a test of the well in December was a success.
The discovery is believed to hold between an estimated 1 and 2 million standard cubic meters of recoverable oil equivalents, according to a news release. The discovery will be considered for development as part of the Oseberg Future Phase 2 project.
Most of the gas discoveries in Tanzania were made in deep-sea offshore blocks south of the country near the site of a planned LNG plant.
The three new fields—Boicobo, Ipaguazu and Boyuy—in the Caipipendi block in southern Bolivia contain enough gas to meet the demands of neighboring Brazil over 10 years, said Diego Diaz, the head of Repsol's Bolivian unit.
The Thalin-1A exploration well in the Rakhine Basin has intersected a gross gas column of about 64 m (210 ft), Woodside said in a news release.
The Al Amir SE 23 (AASE-23) development well in North West Gemsa in Egypt has encountered oil-bearing reservoir sections in the Kareem Rahmi and Shagar formations and will be completed as a producer in the Shagar, according to SDX Energy Inc.