准噶尔盆地车排子地区新近系沙湾组油气突破的一些启示

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

车排子地区新近系沙湾组相继在排2井、车89井、车95井获得工业油流,展示了该区良好的含油气前景。车89井油气藏的储层为一套三角洲前缘水下分流河道砂,油气来源于二叠系和侏罗系的次生混源油气源,为一构造-岩性型复合圈闭。与车89井沙湾组出油气特征相比较,其下伏白垩系与其有相似的沉积、储层和油气成藏条件,并且该区在白垩系车64井、车38井、车56井等井见油气显示,只是并未获得储量,因此该区白垩系有很大的勘探潜力。

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.