The 9000 refers to leases. Leases can be large tracts or small tracts. They are nominated in part by the companies wanting to explore. Others are simply placed there by the agency (such as the BLM) You can bid on them starting at $2 an acre. But the nominated ones tend to lease for $50-5,000 or more per acre. You pay the money and (normally) have to drill within 10 years and pay a "rental" annually of $1.50 or more per acre if you don't drill. If sued by a third party over the lease the lease is tolled until the suit is finished. Then to drill you have a whole bunch of steps to go thru, procure a drilling rig, etc.
SANTA FE, N.M. —The Bureau of Land Management (BLM) New Mexico raised $4,076,273 in its quarterly oil and gas lease sale held Jan. 14, 2021. Nearly 50 percent of the revenue from the sale will go to the states where the oil and gas activity occurs–in this case New Mexico, Texas, Oklahoma and Kansas–while the rest will go to the U.S. Treasury.
For this sale, the BLM offered leases on 37 parcels totaling 6,850.72 acres. The highest bid per acre was $15,101, which sold to PBEX, LLC for 80 acres in Lea County. The same parcel also received the highest bid per parcel with a total of $1,208,080.
The BLM awards oil and gas leases for a term of 10 years and as long thereafter as there is production of oil and gas in paying quantities. If the leases result in producing oil or gas wells, revenue from royalties based on production is also shared with the state.