Interpretación sísmica de anomalías de gas Clasificación de facies sísmicas y análisis avo para su caracterización
Arustizia, Ana Krenek, Daniel Pérez, Carlos
Interpretación sísmica de anomalías de gas Clasificación de facies sísmicas y análisis avo para su caracterización - 9 p. ; 477-486
From cross sectional seismic interpretation, some Lobe-shaped anomalies were interpreted. Those anomalies are related with gas-bearing, tertiary reservoirs, which is of great interest since they lie in shallow depths and those reservoirs have free gas only.The anomalies were characterized from the pre-and post-stack seismic record; different seismic attributes maps were made (spectral decomposition, sweetness, Hilbert Transform, etc.), in order to define their geometry. Then, a seismic facies classification PCA was made to obtain rock-type characterization supported by well-log data. Since the AVO analysis is useful for fluid characterization, a qualitative AVO analysis was performed in this case of study.From this analysis, a number of workovers were identified. Three wells were intervened in order to perforate the reservoirs associated with seismic anomalies in Salamanca Formation (Maastrichtiano-Daniano). The flow-in test proved gas in all of them, with low CO2 content and static pressure.
Gas somero
Facies sísmicas
068.82 553.28 C62 2018 0015644
Interpretación sísmica de anomalías de gas Clasificación de facies sísmicas y análisis avo para su caracterización - 9 p. ; 477-486
From cross sectional seismic interpretation, some Lobe-shaped anomalies were interpreted. Those anomalies are related with gas-bearing, tertiary reservoirs, which is of great interest since they lie in shallow depths and those reservoirs have free gas only.The anomalies were characterized from the pre-and post-stack seismic record; different seismic attributes maps were made (spectral decomposition, sweetness, Hilbert Transform, etc.), in order to define their geometry. Then, a seismic facies classification PCA was made to obtain rock-type characterization supported by well-log data. Since the AVO analysis is useful for fluid characterization, a qualitative AVO analysis was performed in this case of study.From this analysis, a number of workovers were identified. Three wells were intervened in order to perforate the reservoirs associated with seismic anomalies in Salamanca Formation (Maastrichtiano-Daniano). The flow-in test proved gas in all of them, with low CO2 content and static pressure.
Gas somero
Facies sísmicas
068.82 553.28 C62 2018 0015644
