WIT Press


Secondary Cracking And Dispersion Of Rocks At The Contact With Fluids

Price

Free (open access)

Paper DOI

10.2495/SURF030271

Volume

39

Pages

8

Published

2003

Size

362.24 kb

Author(s)

V. M. Kornev & Yu. V. Kornev

Abstract

Secondary cracking and dispersion of rocks at the contact with fluids V.M. ~ o m e v ' & Yu.V. Kornev 1 Lavrent 'ev Institute of Hydrodynamics, Siberian Division, Russian Academy of Sciences, Novosibirsk, Russia 2 MDM Group, Moscow, Russia Abstract An attempt is made to assess the possibility of generation of secondary microcracks when rock is under the action of fluids in the earth's crust. Recrystallization processes at grain boundaries followed by cracking are associated with the Rehbinder process. The model of wedging a semi-infinite crack by the constant-thickness wedge is chosen as a mechanical model. Secondary craclang can be described in terms of the Neuber-Novozhilov type of brittle strength criterion. Instability regions of the crack-wedge system that are defined by the wedge thickness and depth of crack location have been constructed. 1 Introduction Filtration of oil from deep horizons into reservoirs is facilitated by rock fracturing [I]. Macrocracks (sometimes microcracks) are i

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