Comprehensive analysis of hydrocarbon entrapment of the Hsinying gas field and its application to hydrocarbon exploration

The biogenic gas potential of the submarine canyon systems of Plio-Peistocene foreland Basin, southwestern Taiwan

“…15. These minimum inverted impedance anomalies also posses the same character of a NE-SW linear distribution (Fuh et al, 2004b). The same linear geometry can be observed on the seismic amplitude anomaly with A/B > 5, which was interpreted as an unresolved incised valley head on the seismic section (Fuh et al, 2006).…”

“…Based on these phenomena and the results of sequence stratigraphic interpretation discussed above, we concluded that the reservoir of the Hsinying gas field at the base of the Eurchungchi formation is the infill of an incised valley head (Dalla et al, 1997). A stratigraphic trap rather than structural trap was also concluded to be the original entrapment style of the Hsinying gas field (Fuh et al, 2004b). After the biogenic gas was first trapped in the original stratigrahic trap, the trapped gas migrated to the present-day Fig.…”

“…Based on the results of the AVO analysis of seismic lines covering the Hsinying and the Kuantian gas fields, Class III AVO anomaly was identified as a direct hydrocarbon indicator for theses two gas fields (Fuh et al, 2004b). The depth of the production zones of these gas fields is shallower than 1050 m. Logs of the KTN3 well of the Kuantian gas field, such as P-Sonic, S-Sonic and density, were integrated to perform AVO modeling.…”

“…Seismic inversion was performed to 21 reprocessed seismic lines, distributed in the area where the Hsinying gas field, the Kuantian gas field and the YK prospect located (Fuh et al, 2004b). The technique applied to the inversion process is constrain sparse spike inversion (Debeye and van Reil, 1990;Helgesen et al, 2000).…”

“…A/B is the ratio between the target horizon amplitude and the RMS amplitude from the background strata. Resulted seismic attributes extracted along the target horizons together with well based high-resolution sequence stratigraphy analysis were integrated to identify the biogas entrapment style of the Hsinying gas field (Fuh et al, 2004b(Fuh et al, , 2006. Learning from the comprehensive interpretation of the hydrocarbon entrapment style of the Hsinying gas field, the same entrapment style was recognized for the Kuantian gas fields.…”