Petroleum Science >2011,??Issue 1:??87-92 DOI: https://doi.org/10.1007/s12182-011-0119-z
An experimental study of fracture initiation mechanisms during hydraulic fracturing Open?Access
文章信息
作者：Yan Tie,Li Wei and Bi Xueliang
作者單位：
Key Laboratory of Enhanced Oil & Gas Recovery, Ministry of Education, Northeast Petroleum University, Daqing, Heilongjiang, 163318, China;Key Laboratory of Enhanced Oil & Gas Recovery, Ministry of Education, Northeast Petroleum University, Daqing, Heilongjiang, 163318, China;Key Laboratory of Enhanced Oil & Gas Recovery, Ministry of Education, Northeast Petroleum University, Daqing, Heilongjiang, 163318, China
投稿時(shí)間：2010-04-04
引用方式：Yan, T., Li, W. & Bi, X. Pet. Sci. (2011) 8: 87. https://doi.org/10.1007/s12182-011-0119-z
文章摘要
The mechanism of fracture initiation is the basic issue for hydraulic fracture technology. Because of the huge differences in fracture initiation mechanisms for different reservoirs, some successful fracturing techniques applied to porosity reservoirs are ineffectual for fractured reservoirs. Laboratory tests using a process simulation device were performed to confi rm the characteristics of fracture initiation and propagation in different reservoirs. The influences of crustal stress field, confining pressure, and natural fractures on the fracture initiation and propagation are discussed. Experimental results demonstrate
that stress concentration around the hole would signifi cantly increase the fracture pressure of the rock. At the same time, natural fractures in the borehole wall would eliminate the stress concentration, which leads to a decrease in the fracture initiation pressure.
that stress concentration around the hole would signifi cantly increase the fracture pressure of the rock. At the same time, natural fractures in the borehole wall would eliminate the stress concentration, which leads to a decrease in the fracture initiation pressure.
關(guān)鍵詞
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Hydraulic fracturing, porosity reservoir, fractured reservoir, fracture initiation, fracture propagation, simulation experiment