Earth & Environmental Sciences
permeability
100%
shale
40%
coal
35%
hydraulic fracturing
28%
rock
28%
gas
26%
enhanced geothermal system
24%
fluid
23%
effective stress
22%
pore pressure
21%
shale gas
18%
fluid pressure
18%
swelling
17%
porosity
16%
matrix
16%
experiment
15%
coalbed methane
15%
sorption
14%
fracture network
13%
friction
13%
effect
13%
rate
13%
modeling
12%
induced seismicity
12%
compaction
12%
lava dome
12%
pressure solution
11%
dissolution
11%
dual porosity
11%
hydraulics
11%
volcano
10%
evaluation
10%
longwall mining
10%
seismicity
9%
test
9%
mineral
9%
dilation
9%
conductivity
9%
borehole
9%
temperature
9%
gas production
8%
fluid flow
8%
coal seam
8%
fluid injection
8%
simulation
8%
fractured medium
8%
well
8%
reactivation
8%
fracture aperture
8%
fracture propagation
7%
Engineering & Materials Science
Coal
55%
Shale
46%
Rocks
38%
Fluids
27%
Shale gas
25%
Coal bed methane
24%
Porosity
23%
Pore pressure
23%
Swelling
22%
Gases
21%
Sorption
20%
Hydraulic fracturing
17%
Hydraulics
17%
Proppants
15%
Recovery
13%
Minerals
12%
Water
11%
Desorption
11%
Sandstone
10%
Porous materials
10%
Experiments
10%
Kerogen
10%
Hydraulic conductivity
9%
Dissolution
9%
Hot Temperature
9%
Boreholes
9%
Induced Seismicity
8%
Temperature
8%
Adsorption
7%
Compaction
7%
Granite
7%
Flow of gases
7%
Methane
6%
Longwall mining
6%
Flow of fluids
6%
Geometry
6%
Transport properties
6%
Fractals
5%
Numerical models
5%
Fracturing fluids
5%
Coal gas
5%
Carbon dioxide
5%
Pore structure
5%
Physics & Astronomy
permeability
49%
shales
32%
rocks
28%
hydraulics
26%
fracturing
19%
porosity
16%
coal
16%
stimulation
11%
slip
11%
volcanoes
11%
shear
10%
fluids
10%
lava
9%
research facilities
8%
fluid pressure
8%
injection
8%
minerals
7%
domes
7%
friction
7%
boreholes
6%
gases
6%
fluid injection
6%
water
6%
healing
6%
rock intrusions
5%
shear strength
5%
chutes
5%
