Environmental Protection

CNOOC Limited supports green production by strictly controlling pollutant emissions, conducting pollutant and waste management and monitoring throughout the operation processes, thereby reducing waste.

In 2021, we issued the Implementation Plan for Comprehensively Strengthening Solid Waste Management, which clarifies the requirements for the management and control of compliance in major processes concerning the solid waste, including generation, transportation, storage and disposal, so as to promote the systematic and standard management of the solid waste throughout the whole process. The Company realised intelligent, digital and real-time closed-loop management of offshore solid waste through promoting the construction of a whole-process informatisation platform and creating a data chain covering the whole life cycle of solid waste.

In 2021, by multiple means like environment monitoring, special supervision and research, CNOOC Limited continuously strengthen environmental protection management during the operation period to ensure that environmental protection management complies with laws and regulations, and the discharge of pollutants is up to the standard. All branches regularly submit domestic sewage samples for testing to ensure stable and satisfactory discharge of domestic sewage.

Emission and Waste Reduction Targets:

•   Waste gas emission from onshore terminals is organised up to standard: The emission of air pollutants like SO2 and NOx is mainly subject to the Integrated Emission Standard of Air Pollutants (GB 16297-1996), and stricter requirements for environmental protection from local authorities, if any, shall prevail;

•   100% of hazardous waste is entrusted to a qualified third party for compliant disposal: Hazardous waste management is mainly subject to the National Hazardous Waste List (2021) and the Standard for Pollution Control on Hazardous Waste Storage (GB 18597-2001);

•   100% of non-hazardous waste is entrusted to a licensed third party for compliant disposal.

Emission of the Company's Main Pollutants

IndicatorUnit201920202021
Oil Content in Discharged Water(Platform + Terminal)Tons3,9193,4243,491
Chemical Oxygen Demand (COD)(Platform + Terminal)Tons110.4117.1131.2
Sulfur Dioxide(SO₂) (Terminal)Tons12.028.521.6
Nitrogen Oxides (NOx) (Terminal)Tons330.7417.8317.8
Non-hazardous Waste(Platform + Terminal)Tons16,10430,70351,495
Hazardous Waste(Platform + Terminal)Tons45,77228,01140,918

1 We strictly follow the requirements of China’s laws and regulations and always adhere to the principle of minimising and recycling solid/hazardous waste, and realising the harmless disposal of solid/hazardous waste. The solid waste/hazardous waste or the production intensity of solid waste/hazardous waste is not disclosed for the time being as no relevant description has been found in domestic industry regulatory requirements and it is not a key performance indicator for the daily management of enterprises.

2 The Company’s sulfur dioxide and nitrogen oxide emissions are collected and calculated based on the measured data of pollutants’ concentration.