Wally, if I understand correctly, the pond water will communicate with the well water. It will not likely help to fill it the pond. Let's hope the well doesn't drain the pond instead. If it does, you will probably have to pack it with clay.
If you have a dug well beside the pond, it's very possible that it can help. If the well is no less than 20 feet deep, you can pump water from it from above. You have 3 choices. A sucking electric pump, a sumerged well pump, or a centrifugal gasoline pump. The electric pumps are slow, but they quietly and reliably do their job. Gasoline powered centrifugal pumps have very high output. If the gasoline pump doesn't suck the well dry, you can fill your pond in a day or so of pumping, and top it off in a few hours.
If the well depth is 20' or more, you can not suck water from it. The water will have to be "pushed" up with a submersible electric well pump.
Good luck, and let us know how you make out.
