RESERVOIR CHARACTERISTICS AND 2D-CONNECTIVITY MODELING OF NEOGENE SILICICLASTIC SHALLOW-MARINE SUCCESSIONS OF SARA W AK AND SABAH. MALAYSIA

Sedimentological characteristics and pnmary depositional architecture of
siliciclastic shallow-marine reservoirs in terms of reservoir heterogeneities and
connectivity can improve the understanding of subsurface reservoir quality. Traditional
datasets used in reservoir modeling (i.e. seismic and well data) cater a detenninistic
architectural framework with detailed facies and petrophysical description only at
discrete locations. There exists uncertainty associated with heterogeneities pertinent to
the sandstone facies distribution. The ability of outcrop exposure to study the
sedimentary architecture (e.g. stacking patterns, lateral continuation, facies proportions
and distribution) at a wide range of scales and type of reservoir heterogeneities (field/
outcrop scale to micro scale) for reservoir connectivity and 20 modeling make them
ideal analogues for reservoir studies.