This paper describes application of geostatistical techniques for detailed
characterization of a geologically complex oil reservoir. The reservoir is
mature and the characterization is aimed at facilitating its further develo
pment. A geological structure and stratigraphy model of the field has alrea
dy been developed. Stochastic distributions of important reservoir rock pro
perties were subsequently generated. Different techniques were applied to g
enerate these distributions. A variety of data sources were integrated for
each property. Multiple realizations were combined to assess uncertainty in
property distributions. These measures of uncertainty and the detailed pro
perty realizations will be helpful for the field operator for assessing fut
ure field development scenarios. Published by Elsevier Science B.V.