72 Pa. Stat. § 1609-E
Notwithstanding section 3(b) of the act of July 25, 1961 ( P.L. 825, No.359), known as the oil and gas conservation law, the oil and gas conservation law shall not apply to or affect any well or wells which do not penetrate the onondaga horizon, or in those areas in which the onondaga horizon is nearer to the surface than 3,800 feet, any well or wells which do not exceed a depth of 3,800 feet beneath the surface or any well or wells that unintentionally penetrate the onondaga horizon and do not intentionally produce oil or gas from the onondaga horizon. For the purposes of the oil and gas conservation law, the question whether a pool is covered by that law shall be determined by the depth of the producing interval in the discovery well in such pool, and if such producing interval is covered by that law, all wells drilled to such pool shall be covered by that law, even though some of the wells in the pool, if considered alone, would not be covered by that law.
72 P.S. § 1609-E