Reducing methane emissions

According to the inventory results, in 2018–2020 the share of methane in the total GHG emissions (Scope 1) is less than 3 percent. The volume of emissions is mainly due to methane emissions from APG flares during production.

The amount of permissible dispersion of methane, including as part of APG, is regulated by legal requirements Regulations, federal policies and procedures of the oil and gas sector, such as FZ-116 of July 21, 1997 on the Industrial Safety of Hazardous Production Facilities, FZ-22 of March 4, 2013 on Making Amendments to the Federal Law on the Industrial Safety of Hazardous Production Facilities, STO LUKOIL 1.19.1-2012, Federal Policies and Procedures on the Rules for the Safe Operation of In-Field Pipelines. and corporate standards. For all entities of oil and gas production in Russia, standards for losses during APG production at fields are developed annually Calculations are carried out by specialized institutes and approved by the Russian Ministry of Energy. . Considering the high level of APG utilization at LUKOIL’s fields, the share of methane dispersion is much lower than the established standards.

The Group’s entities regularly take measures to reduce gas leaks into the atmosphere caused by scheduled repairs and equipment failures. The technical condition of main and interfield gas pipelines is monitored once a year during a helicopter inspection using lasers to locate gas leaks. Gas pipelines are inspected and examined on a monthly basis to ensure maintenance of equipment and prevent depressurization. As part of the inspection, the corrosion rate and residual life, service life, specific failure rate and other parameters are assessed. In 2020, gas pipelines in the Perm Territory and the Volgograd Region of a total length of 45 km, were diagnosed. Based on the results of inspections and diagnostics, the action plans of the Program of Industrial Safety, Improvement of Labor Conditions and Occupational Safety, and Emergency Prevention and Liquidation of LUKOIL Group entities will include necessary repairs of gas pipelines and gas collection and compression facilities.

Industrial safety expert evaluation and technical inspection of gas equipment and pipelines are carried out annually by independent certified organizations. Based on the results, judgements are made concerning future operations. The results of expert evaluations are used to make decisions on the timely upgrading (replacement) of equipment.

An important tool for maintaining a high level of safety in connection with gas leaks is control of the work of service organizations. Their responsibilities include monitoring emissions using gas analyzers installed at the wellhead of each well. If the sensor gives a signal of an approaching explosive concentration, the contractor must immediately close the wellhead and inform representatives of the LUKOIL entity.

Engineering solutions to prevent methane leaks

The possibility of gas migration during well construction is one of the problems in the development and operation of gas fields. Gas in a formation under pressure can penetrate through cracks and clearances in the equipment into the annular space. As a result, a buildup of pressure building at the wellhead can threaten its safe operation.

LUKOIL-Engineering has developed a solution to ensure the airtightness of the annular space using special grouting slurries prepared on the basis of “self-healing” cements with the addition of gas blockers. Additional airtightness is provided by filling the annular space with gel-polymer compounds. The use of these substances allows for a quick restoration of an annular space and prevention of gas migration. This approach has already been applied at the Pyakyakhinskoye field and has proven its effectiveness, since the occurrences of annular pressures have been significantly reduced. LUKOIL-Engineering is carrying out further research and development work, as a result of which it will be possible to completely eliminate the likelihood of behind-the-casing gas migration.