油田开发后期井间砂体识别

大庆长垣油田历经五十多年的勘探与开发，目前处于高密井网、细分单层开采阶段。为了确定砂体的连通关系和井间窄小河道的边界位置，在高密度三维地震资料和开发井信息基础上，综合钻井的纵向信息和地震横向高密度信息的优势，采用井震结合反演技术建立砂体预测模型。通过地质统计学反演，识别了复合砂体单一河道边界及井间窄小河道砂体。该方法适用于类似油田开发后期井间砂体的识别。

Cross-well sand-body identification in the oilfield development late stage

After more than 50 years of the exploration and development,Daqing Changyuan Oilfield is now in the stage of dense well pattern and single-bed production.The development geological task is to identify the connectivity of sand bodies and the narrow channel boundary between wells.Based on high-density 3D seismic data and well development information,a sand body prediction model for typical Changyuan Block is established with integrated well-seismic data inversion.Single-channel boundary of composite sands and narrow channel sandbodies between wells are identified by the geologic statistics inversion.It is concluded that the integrated well-seismic data inversion synthesizes the advantages of vertical and lateral high density information,and it is suitable for cross-well sand body identification in the oilfield development late stage.