کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
1757867 1523020 2014 7 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Temporary sealing technology to control formation damage induced by drill-in fluid loss in fractured tight gas reservoir
ترجمه فارسی عنوان
فن آوری موقت برای کنترل آسیب شکل گیری ناشی از دست دادن مایع مته در مخزن گاز تنگ شکسته
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کلمات کلیدی
مخزن گاز تنگ شده، فن آوری موقت موقت، آسیب سازنده، از دست دادن مایع دریل مواد تبدیلی از دست رفته اثر همکاری
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی


• We develop temporary sealing technology to prevent drill-in fluid loss and control formation damage in fractured tight gas reservoir.
• We propose maximum plugging pressure, total loss volume before sealing and permeability recovery rate as the three key technology indexes.
• The reasonable combination of rigid granule, fiber and elastic particle can create a synergy effect and meet the index requirements.
• Sized calcium carbonate, cellulosic fiber and graphite carbon are respectively used as rigid granule, fiber and elastic particle.

Western Sichuan tight gas reservoir is characteristic of developed natural fractures and ultra low matrix permeability. Developed fractures are beneficial for the economic and efficient development of tight gas reservoir. But they will lead to lost circulation of drill-in fluid and induce serious formation damage. Moreover, the dynamic fracture width which can reach several hundred microns or millimeter level resulting from drill-in fluid invasion increases the difficulty to solve the problem. To our best knowledge, few papers have been published on the technology that gives a synthetic consideration to both lost circulation control and formation damage prevention in fractured tight gas reservoir. In this paper, we develop the temporary sealing technology and propose its key indexes to control drill-in loss in fractured reservoir. Laboratory experiments are conducted to determine the optimal material size, type and concentration to meet the index requirements. Maximum plugging pressure, total loss volume before sealing and permeability recovery rate are the three key indexes for the temporary sealing technology. Results of laboratory experiment considering the three indexes show that the D90 of the bridging particle size distribution should be equal to the maximum dynamic fracture width. The reasonable combination of rigid granule, fiber and elastic particle can create a synergy effect. The optimal concentration for rigid granule, fiber and elastic particle is 5.0%, 3.0% and 2.5% respectively. Based on the temporary sealing technology, the maximum plugging pressure and permeability recovery rate can be improved to 15.0 MPa and 88.6% respectively, and the total loss volume before sealing can be reduced to only 49 mL.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Natural Gas Science and Engineering - Volume 20, September 2014, Pages 67–73
نویسندگان
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