Evaluation of Petrophysical Properties Interpretations from Log Interpretation for Tertiary Reservoir /Ajeel Field
Iraqi Journal of Oil and Gas Research (IJOGR),
2021, Volume 1, Issue 1, Pages 28-44
AbstractTertiary Formation is divided into three main reservoir units. They are designated from top to bottom designated as Jeribe, Dhiban, and Euphrates. Jeribe unit is the main producing layer in the Tertiary Formation. Formation evaluation has been carried out for the Tertiary Formation of the Ajeel Field by analyzing various log and core data giving a full description of the properties in this Formation. Didger software package 3 was used to digitize the available log data, with the log interpretation by Interactive Petrophysics (IP V3.5) software which was used to correct the environmental parameters and produce the results of CPI. The logs studied were (caliper, deep resistivity, shallow resistivity, gamma ray, sonic porosity, neutron porosity and bulk density). Pickett method was used to determine of the Archie's parameters (the tortuosity factor (a), cementation exponent (m) and the saturation exponent (n)). Total porosity was also calculated using neutron-density porosity logs. The effective porosity was obtained from the total one after extracting the shale percentages from the formation. classical method were used to predicate permeability with the core permeability shows the method correlations. These correlations were used to estimate permeability in uncored wells. According to these work, Tertiary Formation was divided into seven zones (Jeribe in to J1, J2, J3 and Dhiban in to D1, D2 and Euphrates in to E1, E2).
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