Volume of flared and vented hydrocarbons
The increase for 2016 in comparison with the previous year is due to the inclusion of ROGCI assets from the month of January (the data for 2015 include ROGCI from the data of purchase in the month of May). The values for the rest of business activities remain similar to those of 2015.
Specifically, in 2016, 58% of flared gas was at assets in Malaysia. An energy audit was conducted on part of this facility in 2016 to identify opportunities for the reduction of energy consumption and emissions of CO2. The outcome of the audit was a course of action to potentially reduce up to 10% of energy consumption by minimizing flared hydrocarbons.
In the last 10 years we have implemented more than 40 courses of action to reduce flared emissions, thereby producing 372,000 tons less of CO2 per year. These were distributed in our value chain as follows:
|Total by business|
|t CO2/y||Nº actions|
Also in 2016 we identified operational improvements that significantly reduced flared gas emissions. One such measure was at the Petronor refinery (Muskiz, Vizcaya), where we identified and minimized discharge points and optimized operation of liquid ring compressors in order to recover the largest possible amount of gas to be reused at the refinery instead of burning it on flare. These measures enabled us to reduce CO2 emissions by 15,000 tons/year at the refinery.
|Vented gas (tons)|
In 2016, 99% of vented gas was accounted for by the Malaysian asset. This is an isolated platform 200 km from the coast, where the vented gas has a high concentration of CO2 (which is separated from the natural gas extracted), making energy recovery difficult. We are currently analyzing the best possible alternatives to minimize venting.
- Because of the updating of conversion factors used in ROGCI assets, Data modified in reference to Sustainability report 2015