The Upper Crétacé rocks of Krashok formation, Massive formation and Shiranish formation, are very important for petrol and gas reserve, where it is the importance petrol reserves in Syria. 25 samples of these two formations werestudied.The Massive formation had a good Petrological character as reserves rocks ,where it contain calc rocks, which have good reserving properties, and it cover the hole area , and it contain a petrol. Where the Shiranish formation is almost homogenies, and contain calc-marl-clay rocks with foraminifera, and it divide into three zones, depending on it is petro physical properties, the upper zone is the most absorb of petrol, by comparison whit others zones, which show there are many indicators reserve characteristicin these formation.