SY/T 6980-2024 Abandonment of offshore oil and gas production facilities English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
E
Professional standard of the People's Republic of China
SY/T 6980-2024
Abandonment of offshore oil and gas production facilities
海上油气生产设施的废弃处置
(English Translation)
Issue date: 2024-09-24 Implementation date: 2025-03-24
Issued by National Development and Reform Commission, P.R.C
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 General Provisions
5 Abandonment of Engineering Facilities
5.1 General Provisions
5.2 Cleaning of Offshore Facilities Prior to Abandonment
5.3 Methods for Abandonment of Engineering Facilities
5.4 Technical Requirements for Abandonment of Engineering Facilities
5.5 Site Clearance
6 Post-Abandonment Survey
7 Monitoring and Marking of Retained Items
8 Environmental Impact Assessment
8.1 Analysis of Main Environmental Impact Factors
8.2 Environmental Impact Assessment and Report Compilation
9 Safety Risk Analysis and Preventive Measures
9.1 Analysis of Main Hazardous and Harmful Factors
9.2 Safety Preventive Measures
Appendix A (Informative) Cutting Methods
Appendix B (Informative) Environmental Impact Assessment
Bibliography
Abandonment of Offshore Oil and Gas Production Facilities
1 Scope
This document establishes the principles for the abandonment of offshore oil and gas production facilities and their associated extensions.
This document applies to the abandonment of offshore oil and gas field production facilities located in internal waters, territorial seas, contiguous zones, exclusive economic zones, continental shelves, and other sea areas under jurisdiction.
This document does not apply to the abandonment of artificial islands.
Note: This document includes all types of offshore oil and gas production facilities, such as offshore oil wells, gas wells, water wells, fixed platforms, floating production systems, submarine pipelines, submarine cables, subsea production systems, and other associated auxiliary facilities above and below water related to oil and gas production.
2 Normative References
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 4914 Discharge limits for pollutants from offshore petroleum exploration and production
GB/T 25146 Specification for acceptance of chemical cleaning quality of industrial equipment
GB 30871 Safety specifications for special operations in hazardous chemical enterprises
GB 50194 Safety code of power supply and consumption for construction site
GB 50205 Standard for acceptance of construction quality of steel structures
GB 55006 General code for steel structures
HJ 25.4 Technical guidelines for site soil remediation
HJ 298 Technical specification for identification of hazardous waste
JGJ 147 Technical code for safety of building demolition engineering
SH/T 3515 Technical specification for construction of large equipment hoisting engineering in petrochemical industry
SY/T 6845 Specification for offshore well abandonment
SY/T 7413 Technical specification for disposal of abandoned long-distance oil and gas pipelines
TSG 21 Supervision regulation on safety technology for stationary pressure vessel
YD 5221 Temporary regulation for safety of communication facilities demolition
Technical requirements for the construction of hazardous waste safe landfill projects
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
abandonment
The disposal of offshore production facilities and onshore terminals of an oil and gas field after all production activities have ceased.
3.2
abandonment in situ
Disposal where the abandoned facility, after being dismantled and treated, remains in its original location.
3.3
abandonment not in situ
Disposal where the abandoned facility, after being dismantled and treated, is towed/transported away from its original location for disposal elsewhere.
3.4
serving a subsequent new use
Disposal where the abandoned facility is modified to continue being used for other purposes.
3.5
floating production system
A system comprising a floating unit, mooring system, and connected pipelines and cables.
3.6
floating unit
An offshore facility floating on the water surface and moored offshore, used for oil and gas processing, storage, and loading/unloading, or an offshore oil production facility possessing only some of these functions.
Note: Floating units include semi-submersible floating units, ship-shaped floating units, etc.
3.7
mooring system
A system used to moor offshore floating production units.
3.8
subsea production system
A subsea oil and gas production system consisting of subsea production equipment, such as subsea wellheads, and related auxiliary facilities, allowing production directly from subsea wellheads without the need for an above-water structure.
Note: The subsea production system includes subsea trees, subsea wellheads, subsea manifolds, connectors, jumpers, pipeline end terminations (PLETs), subsea processing facilities, subsea controls, and the master control station topside.
3.9
internal water
The sea area on the landward side of the baseline of the territorial sea.
Note: Internal waters include estuaries, ports, bays, and straits along the coast of a coastal state.
3.10
adjacent seas (Territorial Sea)
The sea area measured from the baseline of the territorial sea, extending outward to a maximum width not exceeding 12 nautical miles.
3.11
onshore terminal
A treatment plant constructed on land to receive and process oil, gas, water, or their mixtures extracted from offshore oil and gas fields or field clusters.
3.12
off station pipeline
The onshore section of a landfall pipeline and the export pipeline of an onshore terminal.
3.13
protective demolition
A demolition operation where the primary materials or equipment removed are intended for reuse or repurposing.
3.14
destructive demolition
A demolition operation where the primary materials or equipment removed are not intended for reuse or repurposing and are treated as scrap.
4 General Provisions
4.1 Abandonment operations shall ensure the safety of personnel, property, and the operation itself.
4.2 Abandonment operations shall meet the basic requirements for ensuring navigation safety.
