POROSITY ANALYSIS OF WELL LOGGING ON CORE TO UNDERSTAND Sw AND RESERVOIR CHARACTERISTICS IN THE KUJUNG FORMATION OF WELL Y NORTH EAST JAVA
DOI:
https://doi.org/10.11113/aej.v15.22841Keywords:
effective porosity, reservoir, core data, water saturation, fluid.Abstract
Porosity is the ratio of the volume of porous rock to the total volume of rock multiplied by 100%. Reservoir rocks that have good porosity will affect the volume of oil and gas. The volume of oil, gas and water depends directly on porosity. The study was conducted in the North East Java Basin in the X field, Y well in the Kujung Formation. The objectives are: First, to determine the effective porosity value using porosity calculations with neutron, density, neutron-density models; Second, to determine the comparison of effective porosity values between the results of porosity calculations of neutron models, density models, neutron-density models with core data. The method used is the Well Logging method, using Interactive PetroPhysics software. The results of the calculation of effective porosity in the Kujung Formation from the three models obtained an average effective porosity value between 16.58%-19.95%. Calculation of effective porosity with neutron, density and neutron-density models compared to core data showed a correlation of more than 0.8 so that the calculation results were considered accurate, and could be used for reservoir characteristics and water saturation (Sw). In this area, the determination of porosity is in accordance with the neutron, density, neutron-density model.
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