It isn't easy at all. At least not to do it profitably. If it was everybody would be doing it. Every pink sheet company would be doing it. But they aren't, because there is little chance of profit.
Especially when a Company like GDSM has to sell stock at a massive discount to raise the capital to "invest" in such a venture. If you sell stock at a 50% discount to market to raise the capital to invest in these oil wells, you will have to show a 100% return on your "investment" just to break even.