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.
Financial audit includes examining the relevance and reliability of financial records and reporting activities. Different audits may include those completed for taxation, legal, disclosure, or compliance purposes. Audits may be done internally or externally by third parties that deliver an opinion on whether the financial records are in accordance with specified criteria.