Our family had seismic work conducted on our farm by TGS / Cougar Land Services in 2012. They were reasonable with the agreement, worked professionally and abided by the terms of our agreement.
You still see seismic work in the area now because it can be conducted in different levels of detail. It can provide data useful to the operation and continuing development of existing wellfields. A drilled well gives you information about a small volume of the rock surrounding the wellbore. Seismic data can provide more information about the area between wellbores. It can be acquired and interpreted for large areas for less cost than drilling more infill wells. It can point to better location of future wells among other things.
My woodlot of 45 ac. and the thumper trucks went by on the road, couple of years later they came through with ground crew , helicopters , then later back drilled a few holes set off charges , after they left i found a few shovels of fine gravel. and two ribbons they missed. was not there when they set of the charges. after that they drilled a well a few hundred yards away. ....... have been getting a few hundred bucks a month for a corner of the leased wood lot, gosh that was easy, check in bank every month and i haven't even talked to any one sense they done the seismic.
Life is Good as they say..........
Ps. i don't remember signing any papers for the test just told them to take there lunch and enjoy over the phone.