Mark, I have never seen the Ohio gas-to-house set up, but I am a petroleum geologist and am reasonably familiar with these operations. The guy who comes to service the wellhead is called the Pumper, and he knows near everything about all this equipment. He makes a daily trip to read the pressures and he probably is really friendly because he knows that landowners can be problems. By the way, that is all your oil down there, you just happened to have given someone a contract to produce it for you... and they take 7/8 for that right.
Gas pipelines typically operate at 800 psi, but this is well head gas and sounds like it might be collected to the central facility where it could be compressed before entering the sales line. The fluids coming out of the well bore goe into a seperator somewhere (often a vertically mounted vessel, about 4 feet diameter and 8-10 feet tall) where the gas, oil, and water are, er, seperated. If your gas is "wet", it doesn't matter, that refers to some light petroleum liquids and you just get a better btu value for your gas. Your gas is undoubtedly coming out of the oil (as opposed to a gas cap), and it might be important to note that as oil fields mature, the amount of this type of gas increases rather dramatically.
The pumper is the person with all the answers so make him your best friend. Also, he knows about how much gas is available from the well head.
Read your mineral rights lease. The acreage is held by production (hbp), and typically the lease is void if pumping stops for 181 days (if you push the matter with your lawyer). That is your opportunity to negotiate a new contract. Royalties used to be 1/8 everywhere, but nowadays they often get settled for 1/6 or 1/5. Is there a limit to how much gas you can use? Could be something interesting there...heated olympic sized pool, heated giant greenhouses, etc.
Hope this helps a little...)
Vince