关键词: 频谱成像, 分频切片, 河道, 储层预测, 朝阳沟油田, 松辽盆地北部

Abstract:

The accurate understanding and rational application of the geologic implications of seismic spectrum imaging are helpful to precise description of reservoir distribution patterns and sedimentary features.On the basis of summarizing geological implications of seismic spectrum imaging,we validated the geological imformation reflected by the frequency division slice of amplitude tuning cube of the Chao-86 wellblock in the Chaoyanggou oilfield with well data,estimated thickness of sandstone and seismic attributes.The Fu-I oil layer in the study area has different sedimentary features in the east and west sides.In the east side,although the single channel sandbody is thick,the total thickness of sandstones is small due to the small number of superimposed channel sands.The sediments are sourced from the provenance in the northeast.In contrast,in the west side,although the single channel sandbody is thin,the total thickness of sandstones is relatively large,thanks to the large number of superimposed channel sands.The sediments came from the provenance in the southwest.Frequency division slices not only can accurately reflect the areal distribution and vertical thickness of the channel sandbodies,but also can indicate the provenance,vertical variation and areal distribution of thin reservoirs.

Key words: spectrum imaging, frequency division slice, reservoir prediction, channel, Chaoyaogou oilfield, North Songliao Basin