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This is to certify that your paper entitled «Determining Safe-Stable Mud Weight Window in One of Iranian HPHT Oil Wells» was indexed with 7 pages, in the CIVILICA citation database, code COI:NPGC04_022, after evaluation and approval of the referees of the "The 4th National Conference on Petroleum Geomechanics, Innovation and Technology held in Tehran 2023.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.