TransAtlantic Petroleum Ltd reported in November 2018 that the Cavuslu 1 NFW on Block 4845 in the SE Turkish province of Siirt (District X, Molla Area) was placed onstream, with an initial production rate of 31 boe/d from the Cretaceous Mardin Formation. During Q2 the company had completed a zone within the Mardin Formation, which after acid stimulation flowed at 25-40 bo/d. Additional oil that was tested in the Ordovician Bedinan and Silurian Dadas Formations is expected to be added after a long-term test period.<P />Cavuslu 1, which was spudded on 22 May 2017, reached a TD of 3,460m the following month and encountered several prospective pay intervals. Two sands were discovered in the main objective, the Bedinan Formation. The lower Bedinan sand is 3.7m thick and upon test flowed 60deg API oil at a rate of 80 bo/d without stimulation. The upper sand is 12m thick and is believed to correlate to the main producing sand in the company's Bahar Field (Southeast Turkey Foldbelt), located around 6 km to the NW. In this interval, the well also tested high API gravity oil. In another target, the Silurian Dadas shale, TransAtlantic tested a cumulative 184 bo. <P />The company also reported that it had encountered three prospective sands in the Hazro Formation as well as oil shows in two intervals of the Mardin Formation. The latter is the main producing interval for some of the larger fields in the area, like Kastel, Molla and Goksu.<P />The Cavuslu prospect, a sizeable four-way closure, had been identified on 3D seismic which the company acquired in 2013/2014. Based on internal, pre-drill estimates, TransAtlantic believed the structure could hold recoverable reserves of 12MMbo. TransAtlantic Petroleum Ltd operates Block 4845 with a 100% interest.
Turkey, 4845