Occidental Petroleum's recent jaunt to Omaha aboard a corporate jet presaged a $10 billion investment from Warren Buffett, and now the plane has traveled to the hometown of oil major Royal Dutch Shell.

This comes as Occidental is trying to finalize a deal to buy Anadarko Petroleum, which has a joint venture with Shell in the Permian Basin, the engine of the U.S. shale oil boom. On Monday, Anadarko said it intends to cancel a $33 billion deal to sell its business to Chevron and instead sell its business to Occidental for $38 billion.

Occidental's Gulfstream V has traveled to Rotterdam The Hague Airport in the Netherlands and was on the tarmac on Wednesday, a source told CNBC.