Average Carbon Intensity of crude to California refineries in 2012 down very slightly from 2010 baseline
Staff of the California Air Resources Board (ARB) has posted its calculation of the average 2012 annual carbon intensity of crudes supplied to California refineries. The average value is 11.36 gCO2/MJ, calculated by weighting the carbon intensity value for each crude by the volume supplied to California refineries during 2012. The 2010 baseline Crude Average CI value is 11.39 g/MJ.
The Board approved revisions to the Low Carbon Fuel Standard in 2011, which became effective on 26 November 2012, and were implemented by ARB on 1 January 2013. One of the revisions requires the Executive Officer to post the Annual Crude Average carbon intensity calculation for public comment no later than 15 days after receiving the Annual Compliance Reports, which are due on 30 April of each year. The first such required posting will be in May 2014 for the 2013 Annual Crude Average carbon intensity calculation.
Staff posted the 2012 Annual Crude Average carbon intensity in the same manner for public comment.
All crude oil produced in and offshore of California is assumed to be refined in California. The volume contributions for California crudes are based on oil production data obtained from the California Department of Conservation. The volume contributions of imported crudes are based on oil supply data obtained from California refineries in response to a survey issued in November 2012.
Volume. The greatest volume of crude in 2012 came from Alaska (75,026,823 barrels, with a carbon intensity of 12.81), followed by 57,829,491 barrels of Basra Light from Iraq (CI 12.08) and 49,600,000 barrels from Saudi Arabia (Arab Light, with a CI of 6.75). Ecuador’s Oriente was in fourth place with 34,975,946 barrels and a CI of 9.34.
Carbon Intensity. The highest carbon intensity crude was from California itself, with Placerita crude at the top (CI of 31.66, 954,361 barrels), then Lompoc crude (CI 31.05, 308,222 barrels); San Ardo (CI 28.82, 7,262,337 barrels); Round Mountain ( CI 28.73, 3,848,124 barrels); Poso Creek (CI 28.41, 2,735,209 barrels); Arroyo Grande (CI 27.81, 360,676 barrels); Ant Hill (CI 26.37, 37,336 barrels); and Coalinga (CI 25.36, 5,544,989 barrels) as the highest CI crudes of the 152 different crude from California listed.
Crude from the oil sands in Canada was headed by a carbon intensity of 24.49 g/MJ from Suncor Synthetic, ￼2,925,958 barrels. The lowest CI crude from Canada was Koch Alberta at 7.61 g/MJ.
Venezuelan crude ranged from Petrozuata (all grades) at a CI of 23.58 (1,969,774 barrels) down to Hamaca DCO and Mesa 30 (CI of 11.39, volume of 340,000 and 357,753 barrels, respectively).