Jacobs thread, page-62

29^th Feb 2016 report 88e writes....
http://hotcopper.com.au/threads/ann-icewine-1-evaluation-update.2714204/
Outstanding Effective Porosity of 11%
“Shale Plays Typically in 4 – 7% Porosity Range”

Warnie response... Eagle Ford ended up at 8-12% porosity with ave 12%, so actually higher than this  “outstanding” porosity level and by no means the average.

http://www.aoga.org/wp-content/uploads/2011/03/HB-110-NAK-Shale-Resource-Plays_HFIN_2011-03-231.pdf


Speaking of the Shale play average quoted by 88e, shale plays are not typically 4-7% porosity, and certainly not in US shales.

Below link states....

Porosity: Shale shale oil plays 5-10%. variations of 11-12% for tight oil sands. Porosities in conventional oil and gas reservoirs are 10-15% and up to 35% for unconsolidated sands.

http://www.ogj.com/articles/print/v...data-provide-us-shale-potential-insights.html


17^th march 2016 report 88e writes

http://hotcopper.com.au/threads/ann-project-icewine-phase-i-successfully-completed.2729101/

So where is the porosity %?
Making comparisons with Eagle Ford yet inferior?

88e the writes:

Haynesville shale plays are successful plays in their own right, achieving flow rates over 30 million cubic feet of gas per day with comparatively low decline rates, largely due to excellent permeability.

Haynesville has the worst early decline rates of about 86% a year. The net result is the lowest recovery efficiency-roughly 1.7%-of all major US shale gas plays.
http://www.ogj.com/articles/print/v...data-provide-us-shale-potential-insights.html

Haynesville (direct comparison) as per 88e
In both wells, porosity decreases significantly with depth from a surface porosity greater than 60% to less than 20% at 5000 ft (1.5 km) depth, which is around where the 88e sweet spot lies from memory?
http://www.gcags.org/Journal/2012.gcags.journal/GCAGS.Journal.2012.vol1.p81-96.Nunn.pdf

The porosity levels ave at Haynesville is just 4% on page 6 so must be similar for 88e if comapring themselves to be similar?

http://www.gcags.org/Journal/2012.gcags.journal/GCAGS.Journal.2012.vol1.p81-96.Nunn.pdf

The permeability is not the real issue as this can be increased flow through artificial induced fractures, porosity is.

low-permeability shale reservoirs more permeable, by artificially introducing small fractures into the formation.  Hydrocarbons will readily flow through these artificially-induced fractures, vastly increasing the production from shale wells.

http://www.geomore.com/porosity-and-permeability-2/

What is the calcite and clay level for 88e?
Does anyone know?

This needs to known, especially  the calcite level from the outset as the higher the % the more brittle the shale becomes when hydraulic fracturing.