Texas Natural Resources Code - NAT RES § 91.551. Definitions

(1) “Well” means a well drilled for any purpose related to exploration for or production or storage of oil or gas or both oil and gas, including a well drilled for injection of fluids to enhance hydrocarbon recovery, disposal of produced fluids, disposal of waste from exploration or production activity, or brine mining.

(2) “Electric log” means a wireline survey, except dipmeter surveys and seismic wireline surveys, run in an open hole or a cased hole of a well for purposes of obtaining geological information.

(3) “Drilling operation” means a continuous effort to drill or deepen a well bore for which the commission has issued a permit.

(4) “Operator” means a person who assumes responsibility for the regulatory compliance of a well as shown by a form the person files with the commission and the commission approves.