Evaluation of reservoir potentiality of the Sinjar formation within the Taq-Taq oil field, Kurdistan region, Iraq

Abstract EN

The carbonate rocks of Sinjar Formation in the Taq Taq oil field are analysed in three wells (TT-04, TT-05, and TT-06) to indicate reservoir potentiality using wireline well logs, cutting samples and the structural seismic section of the field.

The lithology of the Sinjar Formation consists of limestone with an interlayer of sandstone at the lower part which only appeared in well TT-05.

Porosity is calculated from three porosity logs and the results show very good magnitudes of porosity with high secondary porosity as revealed from bulk porosity with sonic porosity plot.

Two porosity units are recognized in the Sinjar Formation; 0.18 in the upper unit and 0.07 in the lower unit.

High shale contents are calculated in the studied interval of the Sinjar Formation, which destroyed pore connectivity and acted as barriers to fluid flow.

From petrophysical analyses, it can be illustrated that the Sinjar Formation holds a good secondary porosity but without reserving any hydrocarbons and the formation is not recognized as a potential carbonate oil reservoir in the studied wells.