鄂尔多斯盆地吴起地区长7油层组沉积相研究

Study on Sedimentary Facies of Chang 7 Reservoir in Wuqi Area,Ordos Basin

根据岩石类型、颜色、粒度、沉积构造、测井相等标志对长7油层组沉积相进行了研究。结果表明,该区块发育沉积相主要为三角洲前缘沉积环境,从北向南发育5条水下分流河道。明确有利砂体层位及发育区,可为长7油层组勘探提供依据。

The sedimentary facies of Chang 7 oil formation are studied according to rock type,color,grain size,sedimentary structure and logging equality.The results show that the sedimentary facies in this block are mainly delta front sedimentary environment,and five underwater distributary channels are developed from north to south.The identification of favorable sand body horizons and development areas can provide a basis for the exploration of Chang 7 oil formation.