ISO 20815 is the

International Organization for Standardization The International Organization for Standardization (ISO ; ; ) is an independent, non-governmental, international standard development organization composed of representatives from the national standards organizations of member countries. M ...

(ISO) standard for production assurance and reliability management in the

petroleum Petroleum, also known as crude oil or simply oil, is a naturally occurring, yellowish-black liquid chemical mixture found in geological formations, consisting mainly of hydrocarbons. The term ''petroleum'' refers both to naturally occurring un ...

petrochemical Petrochemicals (sometimes abbreviated as petchems) are the chemical products obtained from petroleum by refining. Some chemical compounds made from petroleum are also obtained from other fossil fuels, such as coal or natural gas, or renewable s ...

and

natural gas Natural gas (also fossil gas, methane gas, and gas) is a naturally occurring compound of gaseous hydrocarbons, primarily methane (95%), small amounts of higher alkanes, and traces of carbon dioxide and nitrogen, hydrogen sulfide and helium ...

industries.ISO 20815:2008: Petroleum, petrochemical and natural gas industries - Production assurance and reliability management
accessed 11 March 2018 The 2008 version of the standard was last reviewed and confirmed in 2012. It has been replaced by ISO/DIS 20815:2018 in October 2018.
accessed 12 December 2018 The division of the

oil and gas industry The petroleum industry, also known as the oil industry, includes the global processes of exploration, extraction, refining, transportation (often by oil tankers and pipelines), and marketing of petroleum products. The largest volume products ...

into

upstream Upstream may refer to: * Upstream (hydrology), the direction towards the source of a stream (against the direction of flow) * Upstream (bioprocess), part of therapeutic cell manufacturing processes from early cell isolation and cultivation until ...

midstream The oil and gas industry is usually divided into three major components: upstream, midstream and downstream. The midstream sector involves the transportation (by pipeline, rail, barge, oil tanker or truck), storage, and wholesale marketing of cr ...

and downstream sectors is referred to in the standard.

References

Natural gas Oil refining Petroleum industry Petroleum production {{measurement-stub