Reservoir

Question 1

A naturally occurring storage area, characteristically a folded rock formation, such as an anticline, that traps and holds petroleum.

Answer 1

Reservoir

Question 2

For a rock to be a petroleum reservoir, it need only be _________— to be able to hold petroleum.

Answer 2

Porous

Question 3

What are the characteristics of an economically viable reservoir?

Answer 3

1. The rock must be permeable.
2. The volume of trap petroleum must be sufficient.
   The reservoir is not too compartmentalized.

Question 4

What are the intrinsic properties of a reservoir?

Answer 4

Net to gross
Porosity
Permeability
Hydrocarbon Saturation

Question 5

The measure of potentially productive part of a reservoir. Expressed as percentage of producible reservoir within the overall reservoir package.

Answer 5

Net to Gross

Question 6

The void spaces in the rock, measured as volume percentage or a fraction.

Answer 6

Porosity

Question 7

The ability of a material (rock) to transmit fluids.

Answer 7

Permeability

Question 8

Most commonly, reservoirs contains both oil and water. It is rare to find a reservoir with pure oil or gas.

Answer 8

Hydrocarbon Saturation

Question 9

Reservoir lithologies

Answer 9

Sandstone
Limestone
Dolomite

Question 10

Sandstone depositional environment

Answer 10

Alluvial Fans
Aeolian Dunes
Lakes
Fluvial Systems
Deltas
Shallow Marine System
Submarine Fans

Question 11

Limestone and Dolomite

Answer 11

Shelfal/Ramp Carbonates
Reefs
Deep Water Carbonates
Dolomite
Karst