Let me answer the question you didn’t ask.
It appears that all four sections have oil & gas production. 11-4-15, 30 & 31-4n-15E are being operated by Scout Energy out of Dallas.
Section 29 has a producing well operated by Foundation Energy in Addison, TX.
Contact both companies via their owner relations email address online and include the transfer of ownership. They will tell you whether your grandmother owned something, if they require further documentation, or what they need. You could even be proactive and send them both a w-9. They will need that.
You should also check unclaimed property in the state where your grandmother lived and Oklahoma to see if there are any funds that have been transferred to the state.