On Oil and Gas Breakthrough of Neocene Shawan Formation in Chepaizi Area of Junggar Basin

Commercial oil and gas flow in Neocene Shawan Formation of Well Pai 2,Che 89 and Che 95 in Chepaizi Area was obtained respectively.It showed the there existed good oil and gas prospects of the area.Reservoir type of Well Che 89 was of underwater distributary channel of delta front,and the hydrocarbon came from Permian and Jurassic.Trap type was of structural-lithological one.Sedimentation,reservoir and hydrocarbon accumulation characteristics of Cretaceous reservoir were very similar to that of Neocene Shawan Formation that was indicated through the analysis of oil and gas characteristics in Well Che 89.There exist some oil and gas indications in Cretaceous of Well Che 64,Che 38 and Che 56,but reserves are not showed here,thus Cretaceous of Chepaizi Area has large exploration potential.