Thailand has been an oil and gas producer for many decades, with falling reserves amid rising domestic petroleum consumption. Proven oil reserves in Thailand is estimated at around 453 million barrels, while proven natural gas reserves stood at about 10.1 Tcf. PTT Exploration and Production (PTTEP), the upstream subsidiary of state-owned PTT Public Company Limited (PTT), is the dominant player in the Thai petroleum industry. Chevron, Total, Mitsui and BG Group are some of the bigger foreign companies with a presence in Thailand's petroleum sector.
Mechanical engineering is a discipline that deals with the design, analysis, manufacturing, installation, operation and maintenance of engines, machinery and tools. It involves the application of principles such as materials science, physics, thermodynamics and more. In an industry such as oil and gas, mechanical engineering can work with a wide variety of machines, tools and mechanical systems.