ABSTRACT
Seismic method is usually used for imaging of underground level as image
geology level and reservoir rock characteristic. Seismic attribute is often used in
exploration analysis with seismic data. Actually, there is no seismic attribute
which explain all lithology of a layer. So, it is needed to get good combination
between seismic attribute data and other hydrocarbon data such as geology data.
One of seismic attribute which can be used to image hydrocarbon reservoir
lithology is acoustic impedance. Inversion which is performed to acoustic
impedance will get cross section result of acoustic impedance spreading which
explain the reservoir lithology. Multi-attribute method can be used to predict and
model of rock porosity from seismic attribute. Apply of this method is used to map
the acoustic impedance and porosity (neutron porosity) from multi-attribute
method. Result of mapping which is obtained from both, then performed overlay.
Results of the research are acoustic impedance inversion and multi-attribute
seismic method which apply to far-offset seismic data produce map of reservoir
lihology and rock porosity spreading. The value of acoustic impedance where
explain a reservoir is between 32500 (ft/s)*(g/cm3) to 42500 (ft/s)*(g/cm3) and
neutron porosity value is between 0,05 to 0,2 in fraction scale.
Key words: seismic, acoustic impedance, multi-attribute..Rad More
geology level and reservoir rock characteristic. Seismic attribute is often used in
exploration analysis with seismic data. Actually, there is no seismic attribute
which explain all lithology of a layer. So, it is needed to get good combination
between seismic attribute data and other hydrocarbon data such as geology data.
One of seismic attribute which can be used to image hydrocarbon reservoir
lithology is acoustic impedance. Inversion which is performed to acoustic
impedance will get cross section result of acoustic impedance spreading which
explain the reservoir lithology. Multi-attribute method can be used to predict and
model of rock porosity from seismic attribute. Apply of this method is used to map
the acoustic impedance and porosity (neutron porosity) from multi-attribute
method. Result of mapping which is obtained from both, then performed overlay.
Results of the research are acoustic impedance inversion and multi-attribute
seismic method which apply to far-offset seismic data produce map of reservoir
lihology and rock porosity spreading. The value of acoustic impedance where
explain a reservoir is between 32500 (ft/s)*(g/cm3) to 42500 (ft/s)*(g/cm3) and
neutron porosity value is between 0,05 to 0,2 in fraction scale.
Key words: seismic, acoustic impedance, multi-attribute..Rad More
