On behalf of the organizing committee, we are pleased to announce that the 6th World Congress & Expo on Oil, Gas & Petroleum Engineering (Oil-Gas-Petroleum-2020), which will be held during February 13-14, 2020 at Lisbon, Portugal. Oil-Gas-Petroleum-2020 provides an ideal academic platform for researchers to present the latest research findings and describe emerging technologies, and directions in Engineering and Oil, Gas & Petroleum issues. The conference seeks to contribute to presenting novel research results in all aspects of Engineering and Petroleum Engineering.