کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8125267 1522777 2018 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Case study of wellbore stability evaluation for the Mishrif Formation, Iraq
ترجمه فارسی عنوان
مطالعه موردی ارزیابی پایداری چاه برای سازند میشریف، عراق
کلمات کلیدی
تشکیل مسیحیت، ثبات چاه، چاه های افتاده، مدل سازی مکانیک زمین، لوله گیر کرده، چسبندگی دیفرانسیل،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
چکیده انگلیسی
During drilling operations for the E oilfield in the Mishrif formation in southern Iraq, stuck pipe has been identified as a significant geomechanical problem for several wells. In this study, a 1-D mechanical earth model (MEM) of the Mishrif formation is compiled based on its state of stress and rock strength parameters, and is utilized to assess the contribution of borehole collapse leading to the stuck pipe problems. The results of this study show that wells characterized by stuck pipe are drilled along azimuths which promote wellbore collapse. Three different failure criteria, the Mohr-Coulomb, Mogi-Coulomb, and Modified Lade rock failure criteria, are investigated in order to determine feasible drilling trajectories (i.e. azimuths and inclinations) and mud pressure conditions for many different wells in the Mishrif Formation. If a specific azimuth for a well cannot be altered, an optimum inclination is recommended to reduce the severity of the borehole collapse. However, as the intermediate principal in-situ stress increases the optimum drilling inclination progressively changes. The presented study shows that 1-D MEMs are an important tool to both assess and address existing wellbore stability problems and to provide guidance for future well plans for better drilling efficiency by reducing non-productive time.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Petroleum Science and Engineering - Volume 164, May 2018, Pages 663-674
نویسندگان
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