Wronski v. Sun Oil Company

Sun Oil (defendant) extracted oil in excess of the limits set by a state proration order governing the shared oil pool beneath multiple properties, including Wronski's (plaintiff) land. The trial court found Sun Oil had exceeded its allowed production by 150,000 barrels total, with 50,000 of those barrels illegally drawn from beneath Wronski's property specifically.

Whether, under Michigan law, the extractor of subsurface oil or gas is liable for conversion of oil or gas from beneath the surface of another's property when the extraction violates regulations intended to preserve equitable ownership of subsurface resources.