شناخت و بررسی عوامل تأثیرگذار بر حفاری در مخازن هیدرات گازی

نوع مقاله : مقاله ترویجی

نویسندگان
احمد قضاتلو 1
آفرین زارع 2
1 عضو هیئت علمی پژوهشگاه صنعت نفت، پژوهشگاه صنعت نفت، تهران، ایران، کدپستی ۱۳۷-۱۴۶۶۵
2 گروه مهندسی شیمی، دانشگاه آزاد اسلامی واحد تهران شمال، تهران، ایران
چکیده
با افزایش برداشت از مخازن نفت و گاز و تقاضای انرژی جهان که توسعۀ تعداد حفاری‌ها و تکنولوژی‌ها‌ی مرتبط به آن را نیز به دنبال داشته بسیاری از کشورها را بر آن داشته است که به اکتشاف و حفاری از مخازن هیدرات گازی متمرکز شوند؛ در نتیجه در سال‌های اخیر چندین حفاری موفق از این مخازن در نقاط مختلفی از جهان گزارش شده که اغلب در بستر دریاها بوده است و این تفکر که حفاری از مخازن هیدرات گاز طبیعی فرایندی خطرناک است را منسوخ کرده و شرکت‌های بزرگ خدمات نفتی ترغیب به توسعۀ آن شده‌اند؛ چراکه حفاری‌های موفق این نتیجه را می‌رسانند که برداشت از مخازن هیدرات گازی به‌سرعت موجب ناپایداری آن نمی‌شود و در نتیجه بسیاری از مشکلات تئوری مطرح‌شده در حفاری از این مخازن منتفی می‌گردد. نکتۀ باقی‌مانده در طراحی سیال حفاری و دوغاب سیمان مورد استفاده است که وظیفۀ حفظ پایداری هیدرات را در طول فرایند حفاری و بهره‌برداری از مخزن بر عهده دارند. این مقاله نگاهی جامع به نتایج به‌دست‌آمده از فعالیت‌های حفاری در مخازن هیدرات گازی دارد.

کلیدواژه‌ها

موضوعات

عنوان مقاله English

Identifying & Examining the Factors Affecting Drilling in Gas Hydrate Reservoirs

نویسندگان English

Ahmad Ghozatloo 1
Afarin Zarei 2
1 Faculty member of Research Institute of Petroleum Industry (RIPI), Tehran, Iran
2 Chemical Engineering Department, Tehran-North Branch, Islamic Azad University, Tehran. Iran
چکیده English

The increase of gas production from conventional gas reservoirs which has led to the development of drilling, logging and coring technology, has moved many countries and scientists to focus on the gas hydrate explorations. Resultantly, many successful gas hydrate wells have recently been drilled in the world, which are mainly on the marine environment. Almost one decade ago, it was considered that drilling in gas hydrate reservoirs was quite risky. However, recent drilling expeditions in marine environment show that producing gas from gas hydrate reservoirs is not risky and has led oil and gas companies are encouraged to develop these kinds of drillings. These successful drillings reveal that production from gas hydrate reservoirs does not dissociate the reservoir immediately and consequently many considered theoretical problems of drilling in these reservoirs will not happen. It is obvious that special cares should be taken to maintain gas hydrate reservoirs as stable as possible, with selecting the right drilling fluid and cement composition. This paper presents a comprehensive view on the results of drilling activities in gas hydrate reservoirs.

کلیدواژه‌ها English

Gas Hydrate
Drilling
Logging
Coring
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  • تاریخ دریافت 11 آذر 1396
  • تاریخ بازنگری 19 اسفند 1396
  • تاریخ پذیرش 24 تیر 1397