SAUDI ARABIA
SABIC
SAUDI ARAMCO
SAMAREC
PETROMIN

LIBYA
VEBA OIL COMPANY
SIRTE OIL COMPANY
WAHA OIL COMPANY
ZUEITINA OIL COMPANY
RASCO

UAE
ADGAS (abu Dhabi)
GASCO
ADCO
ADNOC

KUWAIT
KOC
KNPC

OMAN
OMAN OIL COMPANY
PDO

BAHRAIN
BANOCO
BANGAS

QATAR
QGPC