http://www.oil-gas-leases.com/oil-gas-royalties.html
Whenever oil or gas production begins, the landowner is entitled to part of the total production. A royalty is agreed upon as a percentage of the lease, minus what was reasonably used in the Lessee's production costs. The royalty is paid by the Lessee to the owner of the mineral rights, the Lessor in the Lease. It is based on a percentage of the gross production from the property and is free and clear of all costs, except for taxes.

În funcție de natura textului, poți folosi și drilling rights leasing, lease from drilling rights.