“…Most of the production fields in Malaysia basin and around the globe are from conventional reservoir associated with heterolithic thin bedded (HTB) [1][2][3][4][5][6]. Heterolithic Reservoir description depending on scale of thin bedded, heterogeneous, or laminated pay, which refer to the formation with two or more sand members that non-communicating, each probably with distinct relative and specific permeability characteristics as explain by Henderson et al, [7], Kantaatmadja et al., [9], Nayagawa et al, [12], Stromberg et al, [15]. The HTB is refer to permeable beds interbedded with impermeable shales bedded with millimeter (mm) to centimeter (cm) thickness, which is below standard log resolution and commonly associated with conventional reservoirs.…”