On Seismic Sedimentology of Lacustrine Deltaic Depositional Systems

Key words: 
• seismic sedimentology

Abstract: Seismic sedimentology is the use of seismic data to study sedimentary rocks and the processes by which they are formed．It is a new traverse subject which is superior in mapping highfrequency sequences and depositional systems and has got the obvious results in oilgas exploration and development
．We use the techology of the frequency spectrum decomposition and stratal slicing, the key wells＇constraints to facies types, as well as the use of geomorphic features of different sand shapes to start seismic sedimentological studies in a certain basin of Central Asia．By analysising a series of typical stratal slices, we could find that the target zone is mainly subaqueous distributary channel of braided delta, the delta lobes override in vertical profile, thin layer lacustrine mudstone deposit between underwater distributary of braided delta．