Make sure you get SOMETHING in writing, and filed as county record, that states that YOU keep half the minerals; even if it is just an affidavit from your husband - get it now while you can because Oil-Co's are gonna go on what is filed at the courthouse, not on what so-and-so says. You don't want to have to 'depend' on ex to 'do' anything on your behalf, let alone remain in the chain of royalty $'s from Oil-Co to you. Half goes to home maintance? - who keeps the house? Looks like you've already been talked out of half of your 50%. You need to be in a position to re-lease your half of mineral interest (if it is not drilled/HBP) independantly, in the future.
Like r.w. said, severed minerals SOLELY in your name (for your half) would be best, but in some circumstances may be impossible (upside down mortgage?). 8 acres won't make for a dependable income at all; I've seen folks with 1000 acres go bankrupt when oil/gas values plummet. Oil could go to $30/bbl and gas $0.25/M - it's happened before - always goes up and down. For just 8 acres, it should be treated as windfall income, and squirreled away for a rainy day.