The company said that the test in the Lower Nayfa section of the well confirmed the presence of a working petroleum system within the licence area and made the section a prospective exploration target.
It said preparations were under way to start a second drill stem test in the lower section of the Nayfa formation.
Al Magrabah-1 is located in Block 35 about 55 kilometres northeast of the Nabrajah field.
Participants in Block 35 are operator Oil Search (Yemen) (34.2105%), Virgin Resources (39.4737%), Arc Energy (15.7895%), and MND Exploration and Production (10.5263%).
Oil Search has drilled its Juha-4 sidetrack well in Papua New Guinea to a depth of 3170m and is now running casing prior to drilling into the target Toro reservoir at a depth of 3200m.
Oil Search is operator with a 31.5% stake in Juha-4, while ExxonMobil holds a 56% interest and Merlin Petroleum has 12.5%.
In other news, Oil Search's partner Sipetrol International has drilled the Rana-1 well in Egypt to a total depth of 3739m and is preparing to log the prospective Bahariya and Kharita formations.
The well, which was drilled to test the Cretaceous Abu Roash, Bahariya and Kharita formations, is the third well of an extended drilling program at the East Ras Qatara block.
Oil Search holds a 49.5% interest in Rana-1 while Sipetrol, the operator, has 50.5%.
