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Well Logging For Earth Scientists

The Shuaiba Formation (Aptian) of Kirkuk area is an extensive shelf carbonate extends over most of central and southern Iraq, and far beyond onto the Arabian Gulf region forming one of the most important Cretaceous reservoir of the Middle East region. The first oil well (Kz-1) was drilled in August of 1976 which was penetrated the Shuaiba Formation section and reveals oil accumulation of 32 API type with considerable reserves.

Reservoir Characterization of Shuaiba Formation (Aptian), Khabaz Oil Field, Kirkuk Area, NE Iraq

This study is developed to predict the permeability of Tertiary reservoir in Khabaz oil field northern of Iraq. Two methods are used , which are classical methods and FZI methods, the results show that the permeability estimated by core and classical method which depending on just the porosity are not close enough for the real values because it’s not toke in the considerations all effects parameters . The FZI method is show more real values and provides best correlation coefficient in comparing with the classical methods.

Comparing between permeability prediction by using classical and FZI methods/Tertiary Reservoir in Khabaz Oil Field / Northern Iraq

This paper discusses the method for determining the permeability values of Tertiary Reservoir in Ajeel field (Jeribe, dhiban, Euphrates) units and this study is very important to determine the permeability values that it is needed to detect the economic value of oil in Tertiary Formation This study based on core data from nine wells and log data from twelve wells The wells are AJ-1, AJ-4, AJ-6, AJ-7, AJ-10, AJ-12, AJ-13, AJ-14, AJ-15, AJ-22, AJ-25, and AJ-54, but we have chosen three wells (AJ4, AJ6, and AJ10) to study in this paper Three methods are used for this work and this study indicates that one of the best way of obtaining permeability is the Neural network method because the values of permeability obtained being much closer to the values of K-core than the other methods From this study we obtained many values of permeability for all depths from top to bottom for three wells in Ajeel Field as explained by figures below

/pdf/permeability-determination-of-tertiary-reservoir-ajeel-oil-1tm8663v9p.pdf

Permeability Determination of Tertiary Reservoir/Ajeel Oil Field

Different methods for lithology and mineralogy recognition

The aim of this study is interpretation well logs to determine Petrophysical properties of tertiary reservoir in Khabaz oil field using IP software (V.3.5). The study consisted of seven wells which distributed in Khabaz oilfield. Tertiary reservoir composed from mainly several reservoir units. These units are : Jeribe, Unit (A), Unit (A'), Unit (B), Unit (BE), Unit (E),the Unit (B) considers best reservoir unit because it has good Petrophysical properties (low water saturation and high porous media ) with high existence of hydrocarbon in this unit. Several well logging tools such as Neutron, Density, and Sonic log were used to identify total porosity, secondary porosity, and effective porosity in tertiary reservoir. For Lithological identification for tertiary reservoir units using (NPHI-RHOB) cross plot composed of dolomitic-limestone and mineralogical identification using (M/N) cross plot consist of calcite and dolomite. Shale content was estimated less than (8%) for all wells in Khabaz field. CPI results were applied for all wells in Khabaz field which be clarified movable oil concentration in specific units are: Unit (B), Unit (A') , small interval of Jeribe formation , and upper part of Unit (EB).

/pdf/petrophysical-properties-and-well-log-interpretations-of-442qw4qmqn.pdf

Ahmed Jubiar Mahmood

Papers

Petrophysical Properties and Well Log Interpretations of Tertiary Reservoir in Khabaz Oil Field / Northern Iraq