Abstract：Long eroded Diandong uplift is a source area of multiple Tertiary depressions that developed upon the uplift，surroundings of the depression has deposited sedimentary rock having a good accumulation condition，Dazuizi anticline in Luliang basin attached himself to the depositional body. Sonic velocity of reservoir decreased by 900-950m/s as a result of oil and gas accumulation，formed seismic information on oil and gas pool like "flat spot"，"bright spot” and "low-frequency" which are noted for numerous and obvious character. The most unique character is two "flat spot" (reflected event) formed in a fluid interface of different property and their dip attitude. These seismic information and their reseached results revealed key attitude elements of gas accumulation and bottom water dynamic character which is still in active now，and predicted the possibility that "oil ring" may be existed in Dazuizi gas accumulation.
