Oklahoma County records can be researched below. If this involves a Medicaid Application, DHS reviews the value of the minerals to determine whether they would cause your mother to have excess resources. Excess resources would prevent her from becoming eligible for Medicaid. Generally speaking minerals valued at $6k or less would not be a problem. DHS uses formulas for producing minerals and other methods to value non-producing minerals.
https://www.okcc.online/# This post is no legal, investment or tax advice. This is legal information but does not create an attorney-client relationship by virtue of this post.