The Diyarbakır province is one of the most important Paleozoic and Mesozoic oil-producing areas in the Türkiye and is an increasingly important source of regional energy production. At recent years, through overall new seismic data processing and interpretation, the commercial Cretaceous oil production potential has been made revealed. According to cores, log, thin-section studies, porosity and permeability measurements, and production histories, three distinct reservoir intervals (Sabunsuyu, Derdere and Karababa-C), are present in the Upper Cretaceous Mardin Group carbonates. These three reservoirs, especially that in the Derdere Formation, are the main oil producers in Türkiye.

Petek Production Lease is located 10 km Northwest to the city of Diyarbakır. Petek-1 well was put on production 11 February 2014 as a producer from Upper Cretaceous reservoir in the Mardin Group carbonates. During testing period, the well started natural flow at 90 bbls per day light oil of 35.9-degree API gravity. Petek-2 well was spudded in August 2017 and drilling operations were completed at depth of 2274 m in Mardin Group carbonates (Derdere Formation) in October 2017. Petek-3 production well was spudded in March 2019 and completed at the depth of 2264 m in Mardin Group carbonates in April 2019. 47 bbl of oil were recovered in DST-1 run at 2234-2264 m interval and initial production rate of 14-15 bbl/hour was recorded as of November 2019.

depth of 1813 m on 31/07/2021 in Lower Germav Formation. Recently shot 2D seismic will inform the next steps on this license.