Thank you for the charts! In perfecting the title to the properties, I came across documents indicating that there had been leases paying royalties for decades, starting perhaps (from memory) in the 1960s or 70s and ending in the 1990s. I have no information on whether the wells were shallow, but I gather from the posts here that they were likely relatively shallow and extended into the Marcellus layer.
What is the URL of the website where you find the well information?