关键词: 大庆油田, 井震联合, 窄小河道, 预测精度

Abstract: Seismic prediction technologies for narrow channel sand body are analyzed such as waveform clustering，coherence
cube，frequency division and attribute analysis in order to produce remaining oil of narrow channel sand body，taking Beierxi
area of Daqing oilfield as an example，on the basis of isochronous stratigraphic framework. It is found that different prediction
technologies have different results to narrow channel sand bodies. Waveform clustering can approximately determine direction
of narrow channel，but it can not distinguish narrow channel boundary obviously. Coherence cube is more superior than waveform
clustering in narrow channel boundary recognition. Frequency division can clearly show narrow channel boundary subtle
change. The relationship between the predicted sand body thickness and the actual sand body thickness is established through
the analysis of RMS attribute，and it is verified that prediction accuracy of sand body is different. The prediction accuracy
is high when sand body thickness is more than 2 m and the prediction accuracy can reach 60% on the condition that relative
prediction error is less than 35% when thickness of sand body is between 12 m. The prediction accuracy of attribute is not
reliable when thickness of sand body is less than 1 m. This prediction method has important significance in the production of
remaining oil of narrow channel sand body.

Key words: Daqing Oilfield, well-to-seismic integration, narrow channel, prediction accuracy