Abstract
Plio‐Pleistocene submarine canyon systems in the southwestern Taiwan plain area were established through regional seismic sequence analysis. Seismic attributes such as amplitude, inverted impedance and AVO anomaly of the target horizon (the Base Eurchungchi formation) were integrated with the submarine systems and the structure of the target horizon to analyze the entrapment style of the Hsinying gas field. The consistency between the northeastern trends of seismic attributes anomalies and those of the canyon systems and inconsistency between the distribution of AVO anomaly and that of the structural closure, strongly indicated that the stratigraphic trap should be the hydrocarbon entrapment style. Based on the time‐lapse between well drillings and time‐lapse between seismic surveys, dynamic changes of gas reserve in production history were analyzed. By understanding the hydrocarbon trapping mechanism of the Hsinying gas field, a hydrocarbon high potential zone two kilometers east of the Hsinying gas field was located based on seismic attributes anomalies.
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