Linked from
The 30 pages that link to Fracking, each with the reason it gives.
QuartzRelated: Quartz-rich sand is commonly used as proppant to keep induced fractures open.
SandstoneRelated: Fracturing can improve fluid flow in low-permeability sandstone reservoirs.
Natural gasRelated: It releases gas trapped in low-permeability shale and other tight formations.
Joint (geology)Related: It deliberately opens fractures and may reactivate existing joints.
Effective stressRelated: Injected pressure changes effective stress on fractures and can open them.
ShaleRelated: It enables commercial production from shale formations with very low permeability.
Oil wellRelated: Fractures can connect an oil well to otherwise low-permeability formations.
Niobrara FormationRelated: Operators use it to produce oil and gas from tight Niobrara rock.
SandRelated: Specially graded sand can prop open fractures created in the rock.
Sill (geology)Related: Elevated magma pressure can wedge apart strata and create space for a sill.
Shale gasRelated: It creates pathways through shale so trapped gas can flow toward a well.
LandmanRelated: The technique helps explain the boom and its hazards in the Permian Basin.
MudrockRelated: Fracturing can connect isolated pores in gas-bearing mudrock to production wells.