Shell is working on new supply sources and that could influence prices in the longer term. The oil major has bought a marine terminal on Canada's Pacific Coast as a possible site to export LNG to Asia.
Voser also said that new refining capacity coming online next year would cap margins.
"Refining is a cyclical business and there is significant capacity coming onstream," he added. "It also depends on demand. I would say refining margins will be under pressure next year."
Voser said he was optimistic that the global economy would continue to grow and did not expect a hard landing for China's economy.
"I am confident that the economy of China will grow in line with the aspirations of the Chinese people," he added.