This article is a bit feisty. More than a bit, actually. Pretty sure quite a few readers here will disagree. And that's perfectly OK.
Give it a read, consider what the author says, and go ahead and disagree by all means, but please be helpful to others and provide counter-evidence to refute the evidence presented in the article.
Side note, @shaleprofile aka Enno Peters' site is referenced in the article.
THE SHALE OIL PONZI SCHEME EXPLAINED: How Lousy Shale Economics Will Pull