In ND, you can get paid on wells that you have no lease on! It is tied to the mineral deed net mineral acres and your percentage of the spacing unit. If you are not leased, then the state has set a mandatory percentage rate for the royalty-usually close to 16%. There are also some penalty risk payments which come out of the working interest portion (until the well is paid out) but not the mineral interest royalties . If you know your net mineral acres, then you can usually back out the correct Division Order payment. Sometimes, it is actually better to not be leased than leased in an exceptionally sweet area.
The expenses are another issue. The Taxes are legitimate. The post-production expenses are usually the contentious item. If you had an older lease, then you probably do not have a no-deductions clause. If you are not leased, then there is no clause at all. If you have a newer lease, you were lucky to get a no-deductions clause.