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Rock Matrix
The solid part of the rock; total volume minus pore volume
TERM 2
pores
DEFINITION 2
Void space in the rock; often microscopically small
TERM 3
Reservoir
DEFINITION 3
The volume of the rock containing oil and natural gas
TERM 4
Formation
DEFINITION 4
A certain layer of rock, deposited at a certain time
TERM 5
Gravity Segregation
DEFINITION 5
Tendency of gravity to cause separation of oil, gas, and
water; the less dense the fluid, the higher elevation it
occupies
Trap
Combination of the impermeable barrier and the rock layers
containing petroleum
TERM 7
Abnormality Pressure
DEFINITION 7
A pressure greater than would be expected at a given depth
TERM 8
Porosity
DEFINITION 8
Ratio of pre volume to bulk reservoir volume viod space in
reservoir
TERM 9
Bulk Volume
DEFINITION 9
Total reservoir volume, sum of pore volume and rock matrix
volume
TERM 10
Grain Volume
DEFINITION 10
Rock matrix volume
Secondary Porosity
Porosity due to changes after initial formation
TERM 17
Poorly Sorted
DEFINITION 17
Rock sample with a large variety of grain sizes
TERM 18
Well Sorted
DEFINITION 18
Rock sample with relatively uniform grain size
TERM 19
Unconsolidated
DEFINITION 19
Loosely-compacted or poorly-cemented rock
TERM 20
Consolidated
DEFINITION 20
Well-cemented or highly-compacted rock
