Glossary and Terminology

Question 1

Glossary & Terminology
Damage (Formation Damage): Changes to a reservoir rock
that have a negative impact on the ability of the reservoir to……………………………………………………………………..
commonly considered to be a reduction in ? caused by drilling operations.

Answer 1

produce gas or liquids;

permeability

Question 2

Flowback: The ? of fracture fluid back to the wellbore after

the treatment is completed.

Answer 2

flow

Question 3

Hydraulic Fracturing (aka ‘Fracing’): A method of improving
the permeability of a reservoir by pumping fluids such as water, carbon dioxide, nitrogen or propane into the reservoir at sufficient pressure to ? or ? the rock. 

The opening of natural fractures or the creation of artificial fractures to create ? by which the natural gas can flow to the wellbore.

Answer 3

crack or fracture

pathways

Question 4

Microseismic: The methods by which fracturing of the
reservoir can be ? by geophysical techniques to
determine where the fractures ? within the reservoir.

Answer 4

observed

occurred

Question 5

Multi-Stage Fracturing: The process of undertaking ? fracture stimulations in the reservoir section where parts of the reservoir are

Answer 5

multiple

isolated and fractured separately.

Question 6

Permeability: The ability of the rock to pass ? or ?
through it.

The higher the permeability number, the ?
the amount of fluid or gas that can flow through the rock over a fixed time period.

Permeability is measured in a unit called ?. Conventional reservoirs may have permeabilities in the 10’s to 100’s of millidarcies or occasionally Darcy range. Unconventional or tight reservoirs usually have permeabilitiesin the micro to nano darcy range (one millionth of a millidarcy).

Answer 6

pass fluids or gas
greater

Darcies

Question 7

Porosity: The free ? within the fine grained rock that can store hydrocarbons.

Answer 7

space

Question 8

Propping Agents/Proppants: Non-compressible material,
usually sand or ceramic beads, that is added to the fracture fluid and pumped into the open fractures to ? them ? once the fracturing pressures are removed.

Answer 8

prop them open

Question 9

Reservoir: The ? that contains potentially economic

amounts of ?.

Answer 9

rock

hydrocarbons