The link below contains the data you requested in a comma-delimited, ASCII file that should be readable by normal spreadsheet or database software.
Hold your right mouse button down when you click on the link and select "Save Link to Disk" from the pop-up menu or the data file will be displayed as a web page. On Macintosh computers, hold your mouse button down and a pop-up menu should appear.
The file shows production, acreage, and wells for each field in the county. However, it DOES NOT restrict the values to just wells or production attributed to Johnson County.
To explore the wells in this county, use the Master List of Oil and Gas Wells.
To limit production to leases in this county, use the Production by Lease search.