Subject
Natural gas Geology
Petroleum Geology
40
Geology, Stratigraphic
10
Petroleum reserves
7
Geology
6
Natural gas reserves
5
Natural gas Prospecting
4
Coal Geology
2
Gas reservoirs
2
Petroleum Prospecting
2
Appalachian Basin
1
Clay Analysis
1
Coalbed methane
1
Drill cores
1
Earth resistance (Geophysics)
1
Gas as fuel
1
Gas fields
1
Groundwater
1
Groundwater flow
1
Hydrocarbons
1
Hydrogeology
1
Maroon Formation (Colo.)
1
Mesaverde Group
1
Methane
1
National Petroleum Reserve (Alaska)
1
Natural gas
1
Natural gas Hydrates
1
Natural gas in submerged lands
1
Oil field flooding
1
Petroleum
1
Petroleum in submerged lands
1
Sandstone
1
Sediments (Geology) Analysis
1
Travis Peak Formation (Tex.)
1