The 2,440 km2 (cca 600,000 acres) Körös Exploration Area surrounds the city of Szolnok. In July 2013, Sand Hill Petroleum BV acquired the Körös exploration license and the Mezőtúr V., Tiszakécske I., Szolnok V. and Szolnok VI. production licenses from RAG Hungary Ltd via the acquisition of RAG Hungary Central Ltd, the holder of the licenses. Since then the company was renamed to O&GD Central Ltd.
OGD initiated an intensive exploration program since the acquisition of the Körös block, including drilling several exploration wells and also completed a ca. 500 km2 (ca. 130,000 acres) 3D seismic campaign around and in the city of Szolnok. In 2016 OGD acquired additional 3D seismic near Szarvas and 2D in the vicinity of Tiszakécske and Szolnok.
In 2015 the company also started to produce hydrocarbons from the first discoveries it has made on the Körös block. During 2016 additional 6 production licenses and a gas plant were acquired.