Base on core and well log comprehensive analysis and the sensitivity of the slope of reflection strength of seismic attributes to depositional sequence,the sedimentary facies in sand-shale member of Bachu formation of Lower Carboniferous in Tahe oilfield of Tarim basin is studied,identifying flood tidal delta,coastal shoreface sand,lagoon and barrier island etc.

The Dagu-Yanghe tidal delta,a facies system,is formed on the west side of Jiaozhou bay,where the river mouth bar and interdistributory bay are the major sub-facies.

Applying a numerical model of combined wave refraction diffraction with bottom friction,the wave transformation processes in the ebb delta of Shuidong Bay,western Guangdong Province are simulated in this paper.