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Why Hydraulic Stimulation of Reservoirs at Large Depths is Shear Dominated
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 76th EAGE Conference and Exhibition 2014, Jun 2014, Volume 2014, p.1 - 5
Abstract
Summary
When stimulating a reservoir at depth, the existing fractures are propagated and coalesce. Whilst at low stresses Mode I (tensile) fracturing is mostly dominating, at large overburden stresses Mode II (shear) becomes the dominant mechanism for fracture extension. The contribution analyses the influence of fracture orientation and stress path during a stimulation at depth and discusses the implications for the fracture extension. It is shown that Mode II becomes the dominant mode during hydraulic stimulation at depth >3km.
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