Abstract: The lower cretaceous strata of Xidingjia Area，Songliao Basin is dominated by deep-water deposits. Through the
correlation and interpretation of seismic profiles in the researched area，we found that there are many kinds and amounts of
seismic anomaly bodies in different layer series，such as Sha 1 Member and Ying 3 Member. The majority of these anomaly
bodies are formed by turbidity current deposit and biogenic deposit，and they display external reflection characteristics of
banding，downward cut and lenticular. Based on the study of feature classification of seismic anomaly bodies，we found that
there are close correlations between seismic anomaly bodies and lithological subtle reservoir in this area and most of them have
not been drilled. Therefore，it means good oil and gas prospects. Identification and distribution research with seismic trace and
interpretation of anomaly bodies，can provide new ideas for further exploration and development of lithological subtle reservoir
in Xidingjia Area.

Key words: seismic anomaly body, reflection characteristics, turbidity current deposit, lithological reservoirs, distribution investigation