Abstract：The seismic interpretation of normal fault isvery important because its obvious control roleover Tertiary or even Pre-Tertiary hydrocarbongathering and distribution.The normal fault hasmultiple features on seismic section,the people of-ten considered:①Thickness of strata in downthrow side must greater than or equal to that in uplifted side;②The younger strata should appear indownthrow side of normal fault and older stratashould appear in its uplifted side,which led to resuit in reluctant or mistaken interpretation.Combining with real examples,the paper explained thephenomenon why seismic two-way travel time in uplifted side of normal fault is great than that indownthrow side from several aspects such as cutting action of normal fault during different period,negative inverse of fault,strike-slip movement andintrusion of anomalous body as well as seismic velocity and differential compaction,and analyzedtwo types of fault that appear old strata in down-throw side.
董树政, 卢刚臣, 马军, 李振勇, 孔凡东. 对地震剖面中正断层几种特殊表现形式的认识[J]. 石油地球物理勘探, 2003, 38(1): 72-76.
Dong Shuzheng, Lu Gangchen, Ma Jun, Li Zhenyong, Kong Fandong. Knowledge of several special representative features of normal fault on seismic section. OGP, 2003, 38(1): 72-76.
