- Agip
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- Elf Exploration
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- EWI
- Fina
- Gaffney Cline Associates
- Geoquest
- Hardy
- IEDS Ltd.
- IPA Indonesian Petroleum Association
- Kerr McGee
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- Landmark
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- Nautilus
- Netherlands Geol. Surv.
- Neste
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- ProductionGeoscience Ltd.
- Ranger
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- Total
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