Atlas Log Responses.pdf.pdf

Atlas of Log Responses Atlas of Log Responses mationevaluation@ mationevaluation@ The Changing Face of Formation Evaluation The Changing Face of Formation Evaluation ? 2002 Baker Hughes Incorporated All rights reserved Lithology Gamma Ray & SP Resistivity Oil Based Mud Resistivity Water Based Mud Bulk Density & Neutron Porosity Acoustic ic Resonance T2 Distribution General Log Matrix Responses General Log Matrix Responses Clay Bound Capillary Bound Shale Sandstone RA Mineral Fractures Conductive Fractures Loss of Secondary Porosity Shaly Sand Laminated Pay Oil Salt Water Tuff Marine Shale Limestone Marl Dolomite Fractured Anhydrite NaCI Salt KCI Salt Gypsum Anisotropic (Aeolian) Sand Coal Sandstone Anisotropic Shale Granite Oil Gas Fresh Water 30 API Oil Gas Rh Rv Rh Rv Rh Rv Gas Borehole Image Low <= Amplitude/ Resistivity => High Low ~1000 10-50 - 0 Gas Low 210-240 (api) 70-100 - 0 Oil 0 -infinite 180-190 100 1- 0 Water 67 -3 Low Salt 50 -1 Anhydrite High 43 +4 Low Dolomite 1-5 low 50-150 High - High Shale High 0 Low Limestone High 53 -4 Low Sandstone PE Resistivity Acous