Abstract:

Extensively developed Jurassic coal-meassures in the eastern Junggar Basin have considerable influence on seismic velosity and seismic amplitudes,and this might even impose restriction to some extent on the study of laminnae through seismic factes.But the planar distribution pattern and extension tendency of complex amplitude anomaly in dense 2-dimensional seismic netwotk may be efficient in the prediction of some depositional bodies of suitable thickness.According to Jurassic reflective markers,eight seismic factes have been generalized in this paper,and they in turn could be interpreted as allavialfan,fluvial channel,delta,lake and marsh land.It is proposed by the authors that lake-marsh land facies are the main hydrocarbon-generation factes zones of the region,and the fluvial channels are themain reservoir factes.