If you are not logged in, you will receive a confirmation email that you will need to click on to start receiving the newsletter. In the shale oil business, cash flow is a life or death issue. For smaller players, money from investors and lenders is getting harder to find. Ghawar vs. Permian Basin: Is There Even a Comparison? While some try to put the two enormous oil producers toe-to-toe, the best thing to do might be to understand why they are different.