Blackstone, in a statement today, said that its stake in the assets is valued at $1.54 billion — the private equity giant put up some $1 billion to fund GeoSouthern’s drilling efforts in the region. That means the rest of the cash — about $4.5 billion — will flow to GeoSouthern. This is the first time that most have heard of GeoSouthern. The closely held company, based in The Woodlands, Tex. has managed to stay out of the limelight for more than 25 years now. But a deal like this will attract attention, and not just to the company, but to its founder and CEO George H. Bishop.