Seismic Permits allow the seismic company - who is not necessarily an operator or is subcontracted to an operator, to conduct geophysical operations over lands owned by the mineral owner.
It varies from state to state what minimum percentage of mineral and surface owners of a particular tract must consent to such an operation. I believe in Louisiana it is 80% for both the mineral estate and the surface estate on a tract of land. In Texas, any undivided interest owner in the minerals can grant authority to shoot the seismic.
Pundits will say that "Do not ever grant a Seismic Permit! Get a lease instead!" This can be incredibly short sighted if the 3D shoot was not done by contract to an oil company. These are called "spec shoots" and the seismic company will shoot the land, much like a land developer building spec homes and hope to get them sold for a profit.
In a spec shoot, if enough people say NO (for whatever reason - no lease, etc), the exploration event does not occur and WORSE to the "holdout" is that the shoot goes forward without them and their acreage is shot around and no data collected, therefore their acreage is not evaluated and no opportunity in the foreseeable future to lease. You NEVER want to be left out of a shoot.
Geophysical Options are Seismic Permits with the ability to acquire an Oil Lease in the future at a time and price and lease form certain.
\What about the case of misuse of a Seismic Option? A speculator can tie up thousands of acres for a "proposed 3D shoot" with minimal down payment with no intention of ever conducting a shoot. In that case, for perhaps $25-$50 per acre, you have optioned your land for 18-24 months. This tactic is becoming more and more common.
Your recourse is to include language in permit itself that the actual collection of the data is a moving force of consideration without which the permit would not have been granted and if the lands are not shot, penalties and liquidated damages are due.
One other thing, make all the permit language, single use language. This means that they have one chance to do the operation and do not make it exclusive rights to shoot. Perhaps your lands will be overlain by more than one competing shoot.
Other items for your protection could be minimum selection, minimum required selection,etc.
If you are not entirely confident in your actions, consult a qualified professional for advice.