Northwest Quarter of Section 9, Township 15N, Range 1 West, I.M. Logan County, OK

We are looking for owner information regarding our great-great-grandmother, who homesteaded 160 acres in the Northwest Quarter of Section 9, Township 15N, Range 1 West, I.M. Logan County, OK, according to 1987 U.S. Land Records.

The only record we found was a 1926 mineral deed selling 50% of minerals and keeping the remaining 120 surface 1920, and an oil and gas lease, 1926. Where should we start to find out the current state of ownership?