Al-Dujaili Ahmed N, Asad Maaly S, Saeed Najah, Tileuberdi Nurbol
Petroleum Engineering Department, Amirkabir University of Technology, No. 350, Hafez Ave, Valiasr Square, Tehran, 1591634311, Iran.
College of Engineering/ Petroleum Engineering Department, Kerbala University, Kerbala, Iraq.
Sci Rep. 2025 Jan 25;15(1):3178. doi: 10.1038/s41598-025-87484-9.
Several mechanisms were postulated to reduce drilling problems, improve hole cleaning characteristics, and keep the bit in good condition for the second usage. This study was conducted on Majnoon Field in southeastern Iraq to optimize the bit and drilling parameters. The results indicated that the 16" SFD75D bit proved the preferred bit for both vertical and deviated wells due to its directional capabilities. MMD and MME were the best bit types for 12.25" and 8.5" sections and proved more successful than the FX and EQ types. The maximum weight on bit (WOB), Round per Minute (RPM), mud weight, and flow rate must be 25.45-73 klbs, 50-179.22, 10.5-10.8 ppg, and 662-940 gpm respectively, according to the drilling section. The wells with the J-shape showed a better penetration rate (increased 50-100%) and steadier torque than those with the S-shape for all drilling sections, with some deviations in the Shiranish, Sadi, and Tanuma Formations. The wells in the south have a sliding percentage of drilling hours more than in the north of the Field, and the inclination of the wells in the south was generally more stable and had lower hydraulics requirements than in the north of the Field.
人们提出了几种机制来减少钻进问题、改善井眼清洁特性，并使钻头在二次使用时保持良好状态。本研究在伊拉克东南部的迈季努恩油田进行，以优化钻头和钻进参数。结果表明，16英寸的SFD75D钻头因其定向能力，被证明是垂直井和斜井的首选钻头。MMD和MME是12.25英寸和8.5英寸井段的最佳钻头类型，且被证明比FX和EQ类型更成功。根据钻进井段，最大钻压（WOB）、每分钟转数（RPM）、泥浆比重和流速必须分别为25.45 - 73千磅、50 - 179.22、10.5 - 10.8磅/加仑和662 - 940加仑/分钟。在所有钻进井段中，J形井比S形井显示出更好的钻进速度（提高了50 - 100%）和更稳定的扭矩，不过在希拉尼什、萨迪和塔努马地层存在一些偏差。该油田南部的井滑动钻进时间百分比高于北部，并且南部井的倾斜度总体上更稳定，水力需求也低于北部。
