JARR (Jurassic Analogues: Resources to Reserves)
A new academic-industry research partnership examining the Jurassic shales of the UK.
The project aims to connect a multi-disciplinary team of NERC- and industry-funded researchers at Durham and Newcastle universities with industrial geoscientists. JARR will conduct a scoping study of existing datasets from black shales of the Lower and Upper Jurassic of the UK and Northwest Europe, to evaluate their potential for further in-depth research into shale sweet spot characterisation and resource to reserve estimation.
Click Here for an article addressing the recent BGS/DECC report on the shale prospectivity of the Weald Basin, summarizing some of the work JARR is doing.
New paper by JARR team
(6 May 2015)
How shales fracture is a topic of great significance to any understanding of the viability of fracking. Research on the geomechanics of Jurassic shales, led by Dr Jonny Imber and the JARR team, has been published in the AAPG Bulletin, as part of a thematic issue on the fracturing and faulting of shale reservoirs (http://aapgbull.geoscienceworld.org/content/98/11.toc). Jonny’s paper examines the inter-relationship between shale composition and shale behaviour, and demonstrates that there are numerous variables to consider.
Differences in clay content between individual bed-sets affect their pore fluid pressures and principal stress directions, and thus their geomechanical behaviour. Variations in fracture density are therefore observed in beds of different composition; high clay content tends to be linked with the development of bed-parallel natural fractures. Jonny’s research shows that natural fractures in shales are heterogeneous over distances <15 km, a scale smaller than that of many UK licence blocks. These findings have significant implications to the understanding of variability in shale successions, and of how they will fracture when they are hydraulically stimulated.
An electronic version of the paper – Natural fractures in a United Kingdom shale reservoir analog, Cleveland Basin, northeast England – can be viewed online here: http://dro.dur.ac.uk/13154/