Sequential Poisson impedance (PI) result. (a) XZ cross-section of the original acoustic impedance model. (b) The acoustic impedance section remaining after performing a lithology impedance (LI). The shale-dominated area was eliminated based on the LI result. (c) The acoustic impedance remaining section after performing a porosity impedance (⁠|$\phi {\rm{I}}$|⁠). The tight-porous area was eliminated based on the PI result. (d) The acoustic impedance section remaining after performing a fluid impedance (FI). Only the promising target reservoir area remained in the acoustic impedance model. (e) The final target distribution identified using a sequential Poisson impedance (PI) using a target correlation coefficient analysis.