Oil and Gas Industry Trends in 2019. The top oil and gas industry trends of 2019, were identified by GlobalData researchers, and in their research they use data on online engagement, the number of mentions on Twitter, and different expert analysis. The main trend in the Oil and Gas Industry to watch for in 2019, is the Oil and Gas supply. In the oil industry, some underground crude contains natural gas that is entrained in the oil at high reservoir pressures. When oil is removed from the reservoir, associated natural gas is produced. The diagram below displays the segments of the oil and natural gas industry and presents the top methane emission sources for each sector. Oil and gas professionals contend with a turbulent industry that is impacted by many factors including global economies, environmental concerns, and production abilities. While some may be concerned about the future of oil and gas, many have confidence in its continuing need throughout the world for many years to come.