Supplies of Canadian oil sands heavy crude are increasingly being refined on the US Gulf Coast (USGC) and could top 1.2 million b/d—a full one third of the region’s heavy oil refining market—by 2020, according to an IHS Markit report. Current runs of Canadian crude in the USGC market are estimated to already be more than 800,000 b/d, the information services firm said.