Comprehensive Evaluation of Trap Petroliferous Nature Using Geochemical-Seismic Prospecting Method-An example of South Songliao basin

Geochemical-seisraic trap evaluation is a comprehensive method of applying 2D and 3D seismic observation systems to get geophysical information, through seismic data processing to properly describe in-situ structural trap's spatial morphology and related faulting distribution in order to define the reliability of structural traps. It can directly detect hydrocarbons within traps, pick-up oil-gas leakage information near surface soil from traps under process of stress field, delineating the location of oil-gas accumulation in traps, help recognition of fluid attribute in traps and conduct classification, evaluation and selection of explorative targets. Applying this method to Songnan oil-gas field, several structural traps have been evaluated and selected, which also passed an verification from drilling, achieving good results.