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Subject
- Oil wells[remove]56
- Gas wells39
- Geology, Structural21
- Pipelines12
- Real property9
- Landowners8
- Oil fields8
- Petroleum7
- Natural gas5
- Geology4
- Mines and mineral resources2
- Petroleum industry and trade2
- Petroleum mining2
- Anticlines1
- Bituminous coal1
- Bituminous coal mines and mining1
- Coalfields1
- Faults (Geology)1
- Gas fields1
- Gas industry1
