Okla. Stat. tit. 12, § 12-132: Realty located in two or more counties - Specific

performance.

If real property, the subject of an action, be an entire tract,

and situated in two or more counties, or if it consists of separate

tracts, situated in two or more counties, the action may be brought

in any county in which any tract, or part thereof, is situated,

unless it be an action to recover possession thereof, and if the

property be an entire tract situated in two or more counties, an

action to recover possession thereof may be brought in either of

such counties; but if it consists of separate tracts, in different

counties, the possession of such tracts must be recovered by

separate actions brought in the counties where such tracts are

situated. An action to compel the specific performance of a

contract to sell real estate may be brought in the county where the

land lies or where the defendants, or any of them reside or may be

summoned.