Abstract
The Mauddud reservoir, Khabaz oil field which is considered one of the main carbonate reservoirs in the north of Iraq. Recognizing carbonate reservoirs represents challenges to engineers because reservoirs almost tend to be tight and overall heterogeneous. The current study concerns with geological modeling of the reservoir is an oil-bearing with the original gas cap. The geological model is establishing for the reservoir by identifying the facies and evaluating the petrophysical properties of this complex reservoir, and calculate the amount of hydrocarbon. When completed the processing of data by IP interactive petrophysics software, and the permeability of a reservoir was calculated using the concept of hydraulic units then, there are three basic steps to construct the geological model, starts with creating a structural, facies and property models. The reservoirs were divided into four zones depending on the variation of petrophysical properties (porosity and permeability). Nine wells that penetrate the Cretaceous Formation (Mauddud reservoir) are included to construct the geological model. Zone number three characterized as the most important due to it Is large thickness which is about 108 m and good petrophysical properties are about 13%, 55 md, 41% and 38% for porosity, permeability, water saturation and net to gross respectively. The initial oil and gas in place are evaluated to be about 981Ă—106 STB and 400Ă—109 SCF.
Highlights
Khabaz field is located in Kirkuk, which is located 23 Km to the southwest of Kirkuk City, the dimensions of the Khabaz field are nearly 18 km long and 4 km width
Khabaz oil field represents a asymmetrical subsurface anticline that is affected by faults
The reservoir properties average values shown in Table number 3, based on these results, the petrophysical properties of the Mauddud reservoir are good
Summary
Khabaz field is located in Kirkuk, which is located 23 Km to the southwest of Kirkuk City, the dimensions of the Khabaz field are nearly 18 km long and 4 km width. Khabaz oil field is described as a subsurface asymmetrical anticline, and the northeast limb dipper than the southwest limb, Khabaz oil field has more than one formation (reservoir). The Upper Qamchuqa (Mauddud) Formation with a thickness of about 172 m is one of the reservoirs of the khabaz oil field (Qadir, 2008), which is a goal of this study. The reservoirs may be heterogeneous with limited information; describing and evaluating their petrophysical characteristics might need exceptional approaches and techniques (Al-Beyati et al, 2021). The aims of the study are to establish a geological model for the reservoir by identifying the facies and evaluating the petrophysical properties of this heterogeneous reservoir due to depositional and diagenetic processes, calculate the amount of hydrocarbon. A geological model is known as an applied knowledge that
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