Research Interests

​General interest in engineering geology, drilling, and wellbore geomechanics. My research interest is mainly focused on drilling hydraulics. For my Ph.D., I am working on the experimental setup of a flow loop for testing hole cleaning and cuttings transport in horizontal wells.

Education Profile

  • ​M.Sc., Hydrogeology and Engineering Geology, University of Zagreb, Zagreb, Croatia, 2018.

  • B.Sc., Geology, University of Zagreb, Faculty of Science, Zagreb, Croatia, 2015.

Professional Profile

  • ​2018., PhD student, KAUST, Thuwal, Saudi Arabia


  • Drilling Data Quality and Reliability: A Novel Algorithm for Data Correction and Validation
    Koulidis, A., Ooi, G., Skenderija, J., Ahmed, S.
    Paper published from 2022 International Petroleum Technology Conference and Exhibition, IPTC-22139-MS, Riyadh, Saudi Arabia, (2022) 
  • Application of a Drilling Simulator for Real-Time Drilling Hydraulics Training and Research
    Skenderija, J., Koulidis, A., Kelessidis, V.C., Ahmed, S.
    Paper published from 2021 SPE Middle East Oil & Gas Show & Conf., Bahrain, SPE-204579-MS, Bahrain, (2021)

Awards and Distinctions

  • Dean's Award for Academic Year 2021/2022 In recognition of outstanding academic performance and contributions