东海W气田主力砂体分布规律研究

Study on the main sand distribution of the W gas field in the East China Sea

结合区域沉积背景,依据岩性、沉积构造、沉积韵律、粒度分布等特征判断W气田主力砂体为河道沉积。应用地层倾角测井资料和古地磁磁组构特征分析等方法识别古水流自西北流向东南。并进一步利用地震相特征和井点砂体分布证实该主力砂体的分布规律为北西-南东向展布的带状叠加河道砂体,为后续调整井部署提供指导。

The combination of regional depositional setting,according to lithology,sedimentary structures,sedimentary rhythm,particle size distribution and other characteristics,the main sand of the W gas field is determined as channel deposits.Application diplog data and paleomagnetic fabric analysis methods to identify characteristics Paleocurrent flows southeast from the northwest.And further seismic facies and drilled sands distribution confirmed that the main sand distribution for the North West-South East trending belt superimposed channel sand,providing guidance for subsequent adjustment well deployment.