He attended the NAA /1918-1920/ under professors Petko Klisurov and Ivan Angelov. He obtained a degree in painting from the Art Academy in Dresden /1926/ under professors Oscar Kokoschka and Otto Dix. Obreshkov stretched across various genres with a predilection for landscapes and still lifes. His works exhibited ingenuity, reflecting the modern Bulgarian painting tradition of the 1930s as characterized by complex scenes and an innovative treatment of form and colour.