L-19 THE DEFINITION OF TRANSMISSIVE- DOMINATED HYDRAULIC UNITS (THU) AND STORAGE-DOMINATED HYDRAULIC UNITS (SHU) AND THEIR ROLE IN THE UNDERSTANDING OF RESERVOIR DYNAMICS Abstract 1 Two techniques in petrophysics have been combined for the first time to produce a description of the rock that links primary texture through to well test response. The method is proposed as a new approach to dynamic reservoir characterisation and is illustrated for two North African clastic reservoir examples. Introduction PATRICK CORBETT 1 YASIN ELLABAD 1 2 and KHALIFA MOHAMMED 1 3 1 Department of Petroleum Engineering Heriot-Watt University Edinburgh EH14 4AS UK 2 Wintershall