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The creation of an asymmetric hydraulic fracture as a result of driving stress gradients
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SYSNO ASEP 0330206 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The creation of an asymmetric hydraulic fracture as a result of driving stress gradients Author(s) Fischer, Tomáš (GFU-E) ORCID, RID
Hainzl, S. (DE)
Dahm, T. (DE)Source Title Geophysical Journal International - ISSN 0956-540X
Roč. 179, č. 1 (2009), s. 634-639Number of pages 6 s. Language eng - English Country GB - United Kingdom Keywords downhole methods ; fracture and flow ; earthquake source observations ; geomechanics Subject RIV DC - Siesmology, Volcanology, Earth Structure CEZ AV0Z30120515 - GFU-E (2005-2011) UT WOS 000269736600045 DOI 10.1111/j.1365-246X.2009.04316.x Annotation Hydraulic fracture stimulation is frequently performed in hydrocarbon reservoirs and geothermal systems to increase the permeability of the rock formation. These hydraulic fractures are often mapped by hypocentres of induced microearthquakes. In some cases microseismicity exhibits asymmetry relative to the injection well, which can be interpreted by unequal conditions for fracture growth at opposite sides of the well or by observation effects. Here we investigate the role of the lateral change of the minimum compressive stress. We use a simple model to describe the relation among the lateral stress gradient, the mean viscous pressure gradients in the fracture wings, the fracture geometry, and the net pressure in the fracture. Workplace Geophysical Institute Contact Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Year of Publishing 2010
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