Multi-fluid geothermal energy production and storage in stratigraphic reservoirs

Thomas A. Buscheck, Mingjie Chen, Yue Hao, Jeffrey M. Bielicki, Jimmy B. Randolph, Yunwei Sun, Hyungjin Choi

نتاج البحث

5 اقتباسات (Scopus)

ملخص

Stratigraphic reservoirs (in sedimentary formations) are an under-explored play concept because they are typically associated with a conductive thermal regime, requiring greater depths to reach economic temperatures than hydrothermal upflows. On the other hand, stratigraphic reservoirs offer the advantages of higher permeability (and transmissivity), extending over much larger areas (> 100 km2) than typical upflows (< 3 km 2), and have lower, predictable drilling risk. These make an attractive target for geothermal development, but several challenges need to be addressed. The primary challenge is to maximize heat extraction, while minimizing drilling and extraction costs. To increase extraction efficiency, we propose injecting supplemental fluids (CO2 and/or N2) to augment reservoir pressure, thereby enhancing fluid production rates. Because N2 can be readily separated from air, pressure augmentation can occur during periods of low grid power demand, which will reduce costs and enable energy storage. A well pattern consisting of a minimum of four concentric rings of horizontal producers and injectors is proposed to conserve pressure from injection operations, minimize loss of supplemental fluids, generate large artesian flow rates that take advantage of the large productivity of horizontal wells, and segregate the supplemental fluid and brine production zones. We present simulations of this approach for an idealized reservoir model, consisting of a relatively permeable sedimentary formation, vertically confined by two impermeable seal units. More realistic (heterogeneous) geologic settings and wellbore flow effects will be considered in future studies to more rigorously evaluate the potential economic advantages of this approach.

اللغة الأصليةEnglish
عنوان منشور المضيفGeothermal Resources Council Annual Meeting, GRC 2013
العنوان الفرعي لمنشور المضيفA Global Resource, from Larderello to Las Vegas
الصفحات123-132
عدد الصفحات10
طبعةPART 1
حالة النشرPublished - 2013
منشور خارجيًانعم
الحدثGeothermal Resources Council Annual Meeting: A Global Resource, from Larderello to Las Vegas, GRC 2013 - Las Vegas, NV
المدة: سبتمبر ٢٩ ٢٠١٣أكتوبر ٢ ٢٠١٣

سلسلة المنشورات

الاسمTransactions - Geothermal Resources Council
الرقمPART 1
مستوى الصوت37
رقم المعيار الدولي للدوريات (المطبوع)0193-5933

Other

OtherGeothermal Resources Council Annual Meeting: A Global Resource, from Larderello to Las Vegas, GRC 2013
الدولة/الإقليمUnited States
المدينةLas Vegas, NV
المدة٩/٢٩/١٣١٠/٢/١٣

ASJC Scopus subject areas

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