Scales and Characteristics of Heterogeneity in Sandstone Reservoirs Miri Field, Miri, Sarawak (Miri-Pujut Road Outcrop)

This document discusses on the study of sandstone reservoir heterogeneity
characteristics of Miri field within different scale levels. The objective of this study
is to identify the characteristics of the reservoir units in terms of sedimentology
properties and petrophysical properties. The purpose of this study is also to identifY
the degree of heterogeneity in different scale (megascopic scale (lO's m),
macroscopic scale (10 -lOO's mm) and microscopic level (10-lOO's 11m)). The
outcrop is located at Miri- Pujut Road and belongs to Baram delta basin. It is
comprises of 20 layers but in this study, only 10 of the layers, including sand and
shale layers are considered. The layers are having four different facies; bioturbated,
cross bedded, laminated sandstone and interbedded sandstone and the best sand
layer, with highest quality of porosity and permeability is layer VII.