Jan. 12, 2022


The observations from recent core-through experiments in Unconventional shales show existence of hundreds sub-parallel fractures. While core analysis suggests that many of these fractures were created during or after hydraulic fracturing process, their genesis and structure remain unclear. A hypothesis that the observed fractures are connected to the main hydraulic fractures and result from complex fracture propagation process has been suggested earlier.


In this presentation we describe a very different mechanism for generating multiple extension fractures adjacent, sub-parallel but isolated from the main hydraulic fracture by the rock matrix. A leak-off into heterogeneous layers with sufficiently high hydraulic diffusivity results in the area of tensile effective stresses adjacent to the propagating hydraulic fractures. A simple solution is presented. The effect of the key subsurface parameters on the extent of the potential failure zone is discussed and further research directions are suggested.


Featured Speakers

Speaker: Alexei Savitski
Speaker Alexei Savitski

Shell - Geomechanics Subject Matter Expert


Bio: 19 years with Shell focused on geomechanics.

Date and Time

Wed, Jan. 12, 2022

noon - 1 p.m.
(GMT-0500) US/Central

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VIRTUAL (Webinar)

United States of America


 - Online pre-registration for in-person will end  01/11/2021 at midnight.

-  This event was originally in-person but has been changed to VIRTUAL ONLY because of COVID concerns. 

-  For those who paid in-person pricing, a refund will be provided.