Rock physics interpolation used for velocity modeling of Chalks: Ontong Java plateau example

Abstract

Pore geometries of carbonates are more complex than that of siliciclastics. This complexity makes their velocity interpretation and consequently their reservoir characterization more difficult than for sandstones. In this paper, we try to reduce this complexity by combing geological information and rock physics modeling. This strategy leads to a predictive model for pore aspect ratio changes within the whole area. Well and core data from Ontong Java plateau, which has been drilled by DSDP/ODP project are used to examine this approach. The pore texture seems to follow a predictive pattern in chalks of Ontong Java plateau and it can be predicted and modeled by geology information.