Arrangement of wells for producing subsurface viscous petroleum

Array of wells with connected permeable zones for...

Block pattern method for in situ gasification of subterranean ca

Conductively heating a subterranean oil shale to create permeabi

Contained recovery of oily waste

Controlled placement of underground fluids

Enhanced oil recovery method using an inverted nine-spot pattern

Enhanced oil recovery operations

Enhanced oil recovery technique

Enhanced well production

Fluid flow control in waterflood

Foam injection into a gravity override zone for improved hydroca

Gas and oil production

Gas flooding with horizontal and vertical wells

Gas injection to inhibit migration during an in situ heat...

Gravity assisted solvent flooding process

Hasdrive with multiple offset producers

Heating hydrocarbon containing formations in a checkerboard...

Heating hydrocarbon containing formations in a spiral...

Heating tar sands formations to visbreaking temperatures