دانلود مقاله ISI انگلیسی شماره 146215
ترجمه فارسی عنوان مقاله

تجزیه و تحلیل حساسیت اثر پارامترهای پمپاژ بر شبکه های شکستگی هیدرولیک و تنش های محلی در حین عملیات گاز شیل

عنوان انگلیسی
A sensitivity analysis of the effect of pumping parameters on hydraulic fracture networks and local stresses during shale gas operations
کد مقاله سال انتشار تعداد صفحات مقاله انگلیسی
146215 2017 10 صفحه PDF
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Fuel, Volume 203, 1 September 2017, Pages 843-852

ترجمه کلمات کلیدی
شکستگی هیدرولیکی، مدل سازی عددی، پارامترهای پمپاژ، فشار، گاز شیل، گسستن
کلمات کلیدی انگلیسی
Hydraulic fracturing; Numerical modelling; Pumping parameters; Stress; Shale gas; Faulting;
پیش نمایش مقاله
پیش نمایش مقاله  تجزیه و تحلیل حساسیت اثر پارامترهای پمپاژ بر شبکه های شکستگی هیدرولیک و تنش های محلی در حین عملیات گاز شیل

چکیده انگلیسی

The shale gas industry has significant impact on economies around the world, however, it is not without risk. One of the primary concerns is felt seismicity and recent earthquakes, caused by fault reactivation related to hydraulic fracturing operations, have escalated uncertainty about hydraulic fracturing methods. Mitigating these risks is essential for restoring public confidence in this controversial industry. We investigate the effect that changing two operational parameters (flow rate and pumping time) and differential pressure have on the flow distance, fracture network area and the minimum lateral distance that hydraulic fracturing should occur from a pre-existing fault in order not to reactivate it (lateral respect distance); thus reducing the risk of felt seismicity. Sensitivity analyses are conducted using a Monte Carlo approach. The lateral respect distance is obtained from calculations of the Coulomb stress change of the rock surrounding the injection stage, for four stress threshold values obtained from the literature. Results show that the flow rate has the smallest rate of change for fracture area (3700 m2 per 0.01 m3/s) and flow distance (8.3 m per 0.01 m3/s). We find that differential pressure has the largest impact on stimulated fracture area, when less than 2 MPa, at 31,029 m2/MPa. The pumping time has the most significant effect on the flow distance (48 m/h) and the stress threshold value the most significant effect on the lateral respect distance. This study suggests that to reduce the lateral distance, a compromise is required between flow distance and fracture area. The results obtained by this research provide invaluable guidance for operational practice in determining the potential area of the induced fracture network and generated stress field under realistic hydraulic fracturing conditions, an important aspect for risk assessments.