Illustration of the petroleum industry,
namely an offshore petroleum plant, and the PTT (ปตท) logo, i.e. the logo of
the Thai state-owned oil and gas company, formerly known as the Petroleum
Authority of Thailand, as well as the logo of the
ASEAN Council on Petroleum
Conference and Exhibition, in which the letter O is shaped
in the form of a drop of oil, similar to the PTT logo.