Consistency Test Calculation Porosity of Logging Resistivity Through the Measurement of Common Resistant in Artificial Core Sample

Research has been done about petrophysics of reservoir as an accumulated hydrocarbon. Every rocks have unequal of resistivity, from this resistivity the porosity () quantifiable with using Archie equation. Core sample are made for consistency test calculation porosity of logging resistivity data through the measurement of common resistant in artificial core samples with variation of composite. The result measurement resistivity of shaly sands core samples is 1,19 Ωm consist of clean formation to sandstone 1,29 Ωm, shale 2,58 Ωm and fresh water 0,734 Ωm with measurable porosity is 39,38 % (shaly sands), 19,09 % (sandstone), 42,51 % (shale) and formation factor (F) of shaly sands core samples is 1,62 (shaly sands), 1,75 (sandstone), 3,51 (shale) with this results indicated that decrease in formation factor of shaly sands core samples comparable with increase of porosity of shaly sands core samples. So the data can be used to analyze oil deposit on a reservoir having specific characteristics, so as to increase productivity oil ans natural gas.