Small MT Holder, I think you have a good grasp of the regulations. Yes your half section would with penalty be subject to the cost of 100% of the well. Sounds scary doesn't it?
Once you get past the shock value of that and take stock, they can only recover from production..... say it again, nothing out of pocket and they can only recover from production, then consider your 12.5% from the first barrel, if the well is really poor and never paid out, you could make alot more money off it than the operator did right there.
Then there is the matter that the operator does not drill wells if he thinks he might double his money before it goes dry. He could be mistaken or get a poor well through mechanical failure, but he hopes to make 3 times the cost of the well back at least on a well that I would call barely comercially profitable because of the time frame involved, could be 30 years.
If the well does only recover 3 times what it cost, that's after the penalty you wind up with 1/6 of the production and half ownership in the well equipment not to mention you will have been able to take at least some deductions that a lessor wouldn't, depreciation on the equipment, that you would be paying for the use of as lessor anyway.
Practically speaking, no operator in his right mind is going to want to carry your 50% of the spacing. If he gets a decent well, your part could be as much as a 33% lease, a good well equal to a 50% lease.
There is seldom gain without risk. How much percent are they offering you on the front end to make you give up the potential for larger earning on the back end? I would gladly give up a few percent royalty in the front end to possibly double or more my money. If the well is poor, really a skunk of a well, you will have missed out on the bonus and if the well is that bad, the royalty probably wouldn't make that much difference.
You have to do your research, get the best idea you can of the possible productive nature of your minerals and make the choice that best suits your needs.
When it comes to pooling, you still have your rights as in a lease you probably wouldn't. With an acreage as large as yours 50% of the spacing I think the operator would do better at respecting your rights because he will probably need something from you in the future.