RE:Re Article about the Statoil selected wells@ozgood: I was encouraged by that as well. I did a bit of research on vuggy porosity as well, and here is an interesting article I found: (pay particular attention to the last line) https://www.beg.utexas.edu/indassoc/rcrl/rckfabpublic/vps01.htm Vuggy Pore Space Vuggy porosity is pore space that is within grains or crystals or that is significantly larger than grains or crystals; that is, pore space that is not interparticle. This definition deviates from the restrictive definition of vugs used by Choquette and Pray (1970) as nondescript, nonfabric-selective pores, but it is consistent with the Archie terminology and with the widespread and less restrictive use in the oil industry of the term "vuggy porosity" in referring to visible pore space in carbonate rocks. Vuggy porosity is divided into two classes based on the manner in which the vugs are connected. Separate vugs are interconnected only through the interparticle porosity. Common examples are as leached grains and fossil chambers. Touching vugs form a interconected pore system of significant extent. Common examples are solution enlarged fractures and large, irregular cavities. Fracture porosity is included as a type of touching-vug porosity to be inclusive. So, what I get from that is this: For oil to flow you want the vugs to be connected by little veins, you don't want them to be isolated within the rock. They're full of oil, you want to get it out of the isolated space. Vug-to-vug connections are good for oil flow. Now, say the vugs are isolated, but fracturing the rock would make hairline connections between them, for the purpose of oil recovery that is as good as vug-to-vug connection. You can make oil flow with that. And, as your last post highlighted, in the PFC recovered cores there is oil-filled vugs, and Statoil thinks there is high potential for fracturability, i.e. connecting the vugs via fractures (fracking). 'So.....what you're telling me is there's a chance?" (line from Dumb and Dumber) It still looks good. High risk, but the more info we get it seems to be getting de-risked more and more. All of this is my understanding of what I've read and my understanding of rock mechanics, I could be wrong, I'm in hard-rock mining, not unconventional oil, I don't understand oil as much as I'd like to. Take it as my opinion only, and continue to all do your own due diligence.