Evaluating permeability anisotropy in the early Jurassic Tilje formation, offshore mid-Norway

Abstract

The problem of evaluating permeability anisotropy in the Tilje Formation, Heidrum field, offshore mid-Norway, has been investigated by the Statoil Research Centre by a detailed combination of the geological and petrophysical data. The large diversity and contrasting levels of heterogeneity within depositional facies observed in the Tilje Formation reflect complicated patterns of deposition along deltaic shorelines and the adjunct shelf of a tidally influenced, narrow seaway. Permeability anisotropy can alter the directionality of the fluid flow in the reservoir, and thereby affect the most important exploration procedures: perforation, water and gas injection, production, and estimation of the field resource. This thesis presents a simplified method of modeling permeability anisotropy in the Tilje Formation.