Jurassic oil-bearing sandbodies in the south of Huanghua Depression are typical braided channel sediments. They are chiefly composed of lithic arkose and feldspathic litharenite and are good reservoir rocks with great thickness

wide distribution

coarse grains and good physical property. The Huanghua Depression was a multi-center synclinal basin during the Jurassic

the Yenshan fold belt located in the north of the depression was the main source area. Thebraided channel sandbodies extended from north to south were an important factor to control the distribution of oil and gas.