California Code of Regulations
Title 14 - Natural Resources
Division 2 - Department of Conservation
Chapter 4 - Development, Regulation, and Conservation of Oil and Gas Resources
Subchapter 1.1 - Offshore Well Regulations
Article 2 - Definitions
Section 1741 - Definitions

(a) "District" means oil and gas district as provided for in Section 3105 of Division 3 of the Public Resources Code.

(b) "Division," in reference to the government of this state, means the Division of Oil, Gas, and Geothermal Resources in the Department of Conservation.

(c) "Drilling fluid" means the fluid used in the hole during drilling or other proposed operations.

(d) "Field" means the same general surface area which is underlaid or reasonably appears to be underlaid by one or more pools.

(e) "Field rules" means unique requirements or procedures which may be established by the Supervisor for a producing field.

(f) "Gas" means any natural hydrocarbon gas coming from the earth.

(g) (Reserved)

(h) "Oil" includes petroleum, and "petroleum" includes oil.

(i) "Operations" means any one or all of the activities of an operator covered by Division 3 of the Public Resources Code.

(j) "Operator" means any person drilling, maintaining, operating, pumping, or in control of any well.

(k) "Pool" means an underground reservoir containing, or appearing at the time of determination to contain, a common accumulation of crude petroleum oil or natural gas or both. Each zone of a general structure which is separated from any other zone in the structure is a separate pool.

(l) "Rework" means any operation subsequent to drilling that involves deepening, redrilling, plugging, or permanently altering in any manner the casing of a well or its function.

(m) "String" means a continuous length of connected joints of casing, liner, drill pipe or tubing run into the well, including all attached drilling, cementing, testing, producing, safety, and gravel-pack equipment.

(n) "Supervisor" means the State Oil and Gas Supervisor.

(o) "Well" means any oil or gas well or well for the discovery of oil or gas, or any well on lands producing or reasonably presumed to contain oil or gas or any well drilled for the purpose of injecting fluids or gas for stimulating oil or gas recovery, repressuring or pressure maintenance of oil or gas reservoirs, or disposing of oil field waste fluids or any well drilled within or adjacent to an oil or gas pool for the purpose of obtaining water to be used in production stimulation or repressuring operations.