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Present-day stress control on fluid migration pathways: Case study of the Zechstein fractured carbonates, NW-Germany

Becker, Ivy 1; Müller, Birgit 1; Koehrer, Bastian; Jelinek, Wolfgang; Hilgers, Christoph ORCID iD icon 1
1 Karlsruher Institut für Technologie (KIT)


Understanding the orientation and connectivity of fracture systems in tight reservoirs is essential to reduce uncertainties in reservoir development and production. However, the actual flow potential of the fractures can be controlled by the present-day stress field. Dilation- and slip tendency analyses can improve fracture permeability evaluations and thus, aid in estimating the hydrocarbon recovery of a field.

This study focuses on a naturally-fractured, relatively tight (matrix permeabilities of 0.01–1 mD) and gas-producing Late Permian (Zechstein) reservoir in the Southern Permian Basin, northern Germany. Fracture data are obtained from resistivity image log data of a 775 m long horizontal well, and show principal NE – SW orientation with main dip angles steeper than 70°. To quantify the potential of those fractures that contribute to the flow within the reservoir, dilation (Td)- and slip (Ts) tendencies are calculated. Two different stress scenarios are defined based on known variations in the orientation of the horizontal stresses between formations below and above the Zechstein salt in an offset field approximately 5 km away.
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DOI: 10.1016/j.marpetgeo.2019.03.002
Zitationen: 5
Zitationen: 7
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 05.2019
Sprache Englisch
Identifikator ISSN: 0264-8172
KITopen-ID: 1000092074
Erschienen in Marine and petroleum geology
Verlag Elsevier
Band 103
Seiten 320–330
Nachgewiesen in Dimensions
Web of Science
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