Refining velocity model within the salt section in Santos Basin: An innovative workflow to include the existing stratification and its considerations

Results of Incorporating the Stratigraphy Within the Evaporitic Sequence Into the Velocity Field for Reservoir Characterization

“…Regarding depth migration Gobatto et al (2016) have presented better gather alignment using stratification salts only, with few effort of tomography for the salt section (Fig. 9).…”

“…According to the demonstrated results, interval velocity model built for salt section have a strong influence for amplitude response to be mapped and interpreted below this section, the pre-salt reservoir section. Therefore, the observed geology must be represented as much as possible including the observed (Meneguim et al, 2015(Meneguim et al, , 2016Maul et al, 2016;González et al, 2016;Gobatto et al, 2016).…”

“…Figure 9 -Gather panels showing the move-out effect when using the stratified salt within the evaporitic section, for different "salt domains" like homogeneous, stratified, miscellaneous (Gobatto et al, 2016). stratifications within this evaporitic sequence.…”

“…The method takes into account seismic response (interface reflectors) derived from the presence of lithologic stratification within the evaporitic section, characterized by the presence/alternance of Halite, Anhydrite, Tachydrite, Carnallite, Sylvite and other evaporites (Oliveira et al, 2015;Amaral et al, 2015;Meneguim et al, 2015Meneguim et al, , 2016Gobatto et al, 2016), as well as possible presence of igneous rocks as described in Oliveira et al (2015).…”

“…The proposed method can be adapted according to any available seismic attribute: amplitude, pseudo-impedance, relative acoustic impedance, absolute impedance, seismic facies. The results will provide velocity models that use any seismic attribute as a weight factor for modeling the evaporitic section, achieving a better representation of the lithologic heterogeneities (Maul et al, 2015;Jardim et al, 2015;Oliveira et al, 2015;Meneguim et al, 2015Meneguim et al, , 2016González et al, 2016;Gobatto et al, 2016;Yamamoto et al, 2016). Maul et al, 2016;González et al, 2016;Gobatto et al, 2016;Yamamoto et al, 2016).…”