Pooling of land

If a person owns partial land and is leased to a company, and a couple of 40 acres belong to another person and the same company that leased your land and added the other two land owners to the lease, is that considered "pooling"?

How would you calculate your interest at 25% royalty? Would it be considered one Unit or another amount of units?

Just curious...thanks for any and all information.

Louise