Petrophysical Properties of the Upper Qamchuqa Carbonate Reservoir through Well Log Evaluation in the Khabbaz Oilfield

Authors

  • Ala A. Ghafur Department of Natural Resources Engineering & Management, School of Science and Engineering, University of Kurdistan Hewler, Erbil, Kurdistan Region - F.R. Iraq http://orcid.org/0000-0002-8535-2472
  • Dana A. Hasan Department of Natural Resources Engineering & Management, School of Science and Engineering, University of Kurdistan Hewler, Erbil, Kurdistan Region - F.R. Iraq http://orcid.org/0000-0002-7054-3436

DOI:

https://doi.org/10.25079/ukhjse.v1n1y2017.pp72-88

Keywords:

Carbonates, Cretaceous, Petrophysics, Qamchuqa, Tertiary, Well log

Abstract

Khabbaz oilfield has a symmetrical subsurface anticline with a length of 20 km and a width of 4 km. Despite the fact that Khabbaz oilfield has a small size structure, it is known as one of the massive Oilfields in Iraq. The reservoirs of Khabbaz oilfield are produced by both Cretaceous and Tertiary rocks. The Upper Qamchuqa reservoir is the most productive reservoir of the Khabbaz oilfield with thickness ranges between 138 to 170 m. This formation is subdivided into two units, from the top is Unit A with a thickness of 67 m and from the bottom is Unit B with a thickness of 84.5 m. From a full set of log data of three wells (Kz-1, Kz-13 and Kz-14), the petrophysical properties of Khabbaz oilfield has been evaluated. The wireline log data includes gamma-ray log, sonic log, neutron log, density log and resistivity logs, both Rxo and Rt logs. This study revealed that Unit A represents the best reservoir characteristics where Unit A is subdivided into six reservoir subunits named (1-A, 2-A, 3-A, 4-A, 5-A and 6-A). They are separated by five non-reservoir subunits named 1-N, 2-N, 3-N, 4-N and 5-N. In addition to a less porous reservoir unit that is called Unit B, which has been divided into four reservoir subunits named 1-B, 2-B, 3-B and 4-B. These are separated by five non-reservoir units named 1-N, 2-N, 3-N, 4-N and 5-N. It has been recognized that both reservoir units A and B are clean formations and have minimum shale volume with high porosity in limestone and dolomite to dolomitic limestone lithology with high oil saturation and low water saturation. Based on the above reservoir characteristics it can be concluded that the reservoir units of the Khabbaz oilfield contain a massive commercial hydrocarbon accumulation.

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Author Biographies

  • Ala A. Ghafur, Department of Natural Resources Engineering & Management, School of Science and Engineering, University of Kurdistan Hewler, Erbil, Kurdistan Region - F.R. Iraq

    Ala A. Ghafur, Assistant professor of Petroleum Engineering-Natural Resources Engineering and Management joined UKH in September 2013 having different positions in the Natural Resources Engineering and Management department. She received her MPhil-PhD degree in Petroleum Geoscience specialized in Carbonate Reservoir Characterization and Sedimentology from Cardiff University, Cardiff City, United Kingdom. BSc Degree in Geology in the University of Sulaimani, Sulaimani City, Kurdistan region of Iraq. Major: Petroleum Geology.

  • Dana A. Hasan, Department of Natural Resources Engineering & Management, School of Science and Engineering, University of Kurdistan Hewler, Erbil, Kurdistan Region - F.R. Iraq

    Dana Abdulkareem holds a B.Sc. in Petroleum Engineering at the University of Kurdistan-Hewlêr. In 2016 he joined UKH as a teaching assistant (TA) in the Reservoir Simulation lab. Previously he was the head of a department and a lecturer at a Private Oil and Gas Institute.  Furthermore, at the Reservoir Simulation laboratory, Dana is guiding and training research students (both at undergraduate and post-graduate levels) on software related to Reservoir Simulation. He gives training for required groups of students/researchers from different institutes and companies, coordinates with other module leaders who might need to use some applications of petroleum simulators available in the laboratory, and assists students with their individual projects.

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Published

2017-12-27

Issue

Vol. 1 No. 1 (2017): ISSUE ONE

Section

Research Articles

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How to Cite

Petrophysical Properties of the Upper Qamchuqa Carbonate Reservoir through Well Log Evaluation in the Khabbaz Oilfield. (2017). UKH Journal of Science and Engineering, 1(1), 72-88. https://doi.org/10.25079/ukhjse.v1n1y2017.pp72-88