The extended elastic impedance (EEI) inversion method is a seismic inversion technique that can optimally predict the character of a hydrocarbon reservoir using expansion of the incident angle from -90° to +90°. In the study of Field "Q" Sub-Basin Jambi, EEI was used to characterize a sandstone reservoir and predict the existence of gas or oil using the parameters Vp/Vs ratio, lambda-rho, and mu-rho. EEI was performed to determine the maximum correlation value at the optimum chi (χ) angle for each parameter specified by the correlation between the target logs and the EEI logs. The optimum chi (χ) angle was used to create a scaled volume reflectivity that was then used to make an initial model, which was required in the inversion process. Inversion was performed using a post-stack inversion-based model. The inversion results were then used to determine the spread of the reservoir, with the results indicating the possibility of a reservoir containing gas and oil. In this study, the Vp/Vs ratio ranged between 16 and 18, the mu-rho values ranged between 25 and 35 GPa∗(g/cc), and the lambda-rho values ranged between 20 and 22 GPa∗(g/cc) for gas and between 25 and 27 GPa∗(g/cc) for oil.
|Journal||IOP Conference Series: Earth and Environmental Science|
|Publication status||Published - 27 Apr 2020|
|Event||Life and Environmental Sciences Academics Forum 2018, LEAF 2018 - Depok, West Java, Indonesia|
Duration: 1 Nov 2018 → …
- Extended elastic impedance
- subbasin Jambi
- Vp/Vs ratio